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Chinese Journal of Chromatography
2013, Vol. 31, No. 11
Online: 28 November 2013

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Preparation of a new stationary phase with s-triazine and amide embedded and its application in separation of basic compounds SHEN Conghua, LI Ping, TANG Tao, SUN Yuanshe, LEI Wu, WANG Fengyun, LI Tong 2013, 31 (11):  1035-1039.  DOI: 10.3724/SP.J.1123.2013.06021 Abstract ( 1176 )   [Full Text(HTML)] () PDF (758KB) ( 254 )   A new kind of silica-bonded reserved stationary phase with s-triazine and amide polar groups embedded for HPLC was obtained by step-wise reactions of silica gel with s-triazine, γ-aminopropyltriethoxysilane, ethanediamine and dodecanoyl chloride. The new stationary phase was characterized by elemental analysis. After that, a column packed with the new stationary phase was used to separate basic compounds. A commercial C18 column was also tested under the same chromatographic conditions for comparison. The results indicated that the ligand was successfully bonded to the surface of the silica and the maximum relative deviations of element contents were within 5% for carbon, nitrogen and hydrogen by three times. Furthermore, in the separation of five basic anilines and four basic pyridines, the excellent selectivity and symmetrical peak shapes provided a reference for advancing the commercialization of the new stationary phase.

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Determination of triclosan and triclocarban in human nails by solid-phase extraction and ultra performance liquid chromatography-tandem mass spectrometry SHI Ying, ZHANG Jing, LU Libin, SHAO Bing 2013, 31 (11):  1040-1045.  DOI: 10.3724/SP.J.1123.2013.05032 Abstract ( 935 )   [Full Text(HTML)] () PDF (804KB) ( 237 )   An analytical method was developed to simultaneously detect triclosan (TCS) and triclocarban (TCC) in human nails using solid phase extraction (SPE) with ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Nail clippings were digested by sodium hydroxide, and then concentrated and purified with C18 cartridges. Chromatographic separation was performed on a Waters ACQUITYTM UPLC HSS T3 column (100 mm×2.1 mm, 1.8 μm) with gradient elution using methanol and water at a flow rate of 0.3 mL/min. The target compounds were determined by triple quadrupole mass spectrometer operated in the negative ion mode and quantified by isotopic-dilution technique. The satisfactory linearities (r2=0.999) was obtained over the ranges of 0.5-500.0 μg/kg for TCS and 0.1-100.0 μg/kg for TCC, with the limits of quantification (LOQs) of 2.0 μg/kg for TCS and 0.2 μg/kg for TCC. The average recoveries of the two target compounds (spiked at three concentration levels) ranged from 95.9% to 110.2%, with the relative standard deviations (RSDs) between 0.6% and 9.7% (n=6). This method can be applied in rapid detection of target contaminants in nails due to its high sensitivity, high recovery and good reproducibility. Sixty collected human nail samples were analyzed by means of the developed method. TCS and TCC were detected in all samples with content ranges of

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Determination of five pyrrolizidine alkaloids in honey by liquid chromatography-tandem mass spectrometry LÜ Chen, DING Tao, MA Xin, CHEN Guosong, YUAN Fang, WU Bin, SHEN Chongyu, ZHANG Rui, FEI Xiaoqing, ZHANG Xiaoyan, CHEN Lei, LI Li 2013, 31 (11):  1046-1050.  DOI: 10.3724/SP.J.1123.2013.06010 Abstract ( 1232 )   [Full Text(HTML)] () PDF (772KB) ( 301 )   A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the determination of five pyrrolizidine alkaloids (PAs) (monocrotaline, senkirkine, retrorsine, seneciphylline and senecionine) in honey. The honey samples were dissolved in 0.1 mol/L hydrochloric acid solution and a strong-cation exchange column was used to purify and concentrate the target analytes. The separation of the analytes was carried out on a Phenomenex C18 column(100 mm×4.6 mm, 2.6 μm)using the mobile phases of acetonitrile and 5 mmol/L ammonium acetate-0.1% (volume percentage) formic acid aqueous solution with gradient elution. The separated compounds were detected in multiple reaction monitoring (MRM) mode via positive electrospray ionization (ESI+). The calibration curves were of good linearity in the range of 1-100 μg/L (r >0.99). The limit of quantification of the method was 1.0 μg/kg. The average recoveries were between 73.1% to 107.1% at three spiked levels (1, 20 and 50 μg/kg) with the relative standard deviations(RSDs)in the range of 4.1% to 17.0%. The proposed method was applied to different kinds of honey from China, New Zealand, Spain and Australia. The samples included rape, vitex, sunflower, cotton, tilia tree, date, acacia, buckwheat, manuka and eucalyptus honey. Monocrotaline, senkirkine and retrorsine were not detected in the collected honey samples. However, seneciphylline and senecionine were found in most of the honey samples. The concentrations of seneciphylline and senecionine were 11.0-31.1 μg/kg and 8.3-29.1 μg/kg, respectively.

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Systematic evaluation of retention behavior of carbohydrates in hydrophilic interaction liquid chromatography FU Qing, WANG Jun, LIANG Tu, XU Xiaoyong, JIN Yu 2013, 31 (11):  1051-1056.  DOI: 10.3724/SP.J.1123.2013.06032 Abstract ( 949 )   [Full Text(HTML)] () PDF (802KB) ( 273 )   A systematic evaluation of retention behavior of carbohydrates in hydrophilic interaction liquid chromatography (HILIC) was performed. The influences of mobile phase, stationary phase and buffer salt on the retention of carbohydrates were investigated. According to the results, the retention time of carbohydrates decreased as the proportion of acetonitrile in mobile phase decreased. Increased time of carbohydrates was observed as the concentration of buffer salt in mobile phase increased. The retention behavior of carbohydrates was also affected by organic solvent and HILIC stationary phase. Furthermore, an appropriate retention equation was used in HILIC mode. The retention equation lnk=a+blnCB+cCB could quantitatively describe the retention factors of carbohydrates of plant origin with good accuracy: the relative error of the predicted time to actual time was less than 0.3%. The evaluation results could provide guidance for carbohydrates to optimize the experimental conditions in HILIC method development especially for carbohydrate separation.

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Analysis of N-glycosylated protein and N-glycans in human plasma by hydrophilic enrichment strategy MA Cheng, PAN Yiting, ZHANG Qi, WANG Jifeng, QIAN Xiaohong, YING Wantao 2013, 31 (11):  1057-1063.  DOI: 10.3724/SP.J.1123.2013.05043 Abstract ( 1487 )   [Full Text(HTML)] () PDF (1825KB) ( 431 )   N-glycosylation of proteins is one of the most important post-translational modifications (PTM). Many diagnostic biomarkers and therapeutic targets are glycosylated proteins. However, it is still a big challenge to identify glycoproteins in human plasma, because of the high dynamic range and microheterogeneity of glycosylation. In this work, hydrophilic interaction liquid chromatography (HILIC) enrichment, high-pH reversed-phase prefractionation and high accurate mass spectrometry (MS) analysis were combined to profile the N-glycoproteins in human plasma. In total, 637 N-glycosites from 299 glycoproteins (protein groups) were identified. There were also 31 glycoforms recognized after HILIC enrichment and MS analysis. Among the results, 107 glycosylation sites (16.8%) are newly found. This study provided a simple and reliable strategy for exploring potential N-glycoprotein biomarkers from complicated biological systems.

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Determination of total protein content in soya-bean milk via visual moving reaction boundary titration GUO Chengye, WANG Houyu, ZHANG Lei, FAN Liuyin, CAO Chengxi 2013, 31 (11):  1064-1070.  DOI: 10.3724/SP.J.1123.2013.04040 Abstract ( 992 )   [Full Text(HTML)] () PDF (7470KB) ( 192 )   A visual, rapid and accurate moving reaction boundary titration (MRBT) method was used for the determination of the total protein in soya-bean milk. During the process, moving reaction boundary (MRB) was formed by hydroxyl ions in the catholyte and soya-bean milk proteins immobilized in polyacrylamide gel (PAG), and an acid-base indicator was used to denote the boundary motion. The velocity of MRB has a relationship with protein concentration, which was used to obtain a standard curve. By paired t-test, there was no significant difference of the protein content between MRBT and Kjeldahl method at 95% confidence interval. The procedure of MRBT method required about 10 min, and it had linearity in the range of 2.0-14.0 g/L, low limit of detection (0.05 g/L), good precision (RSD of intra-day<1.90% and inter-day<4.39%), and high recoveries (97.41%-99.91%). In addition, non-protein nitrogen (NPN) such as melamine added into the soya-bean milk had weak influence on MRBT results.

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Extraction of triazine herbicides from environmental water samples with magnetic graphene nanoparticles as the adsorbent followed by determination using gas chromatography-mass spectrometry ZHANG Guijiang, ZANG Xiaohuan, ZHOU Xin, WANG Lu, WANG Chun, WANG Zhi 2013, 31 (11):  1071-1075.  DOI: 10.3724/SP.J.1123.2013.05048 Abstract ( 987 )   [Full Text(HTML)] () PDF (1049KB) ( 193 )   A novel method was developed for the determination of seven triazine herbicides in environmental water samples by magnetic solid-phase extraction with graphene-based magnetic nanoparticles (G-Fe3O4 MNPs) as the adsorbent coupled with gas chromatography-mass spectrometry detection. The main factors influencing the extraction efficiency including the amount of G-Fe3O4, the extraction time, the pH and the ionic strength of sample solution and the desorption conditions were optimized. Under the optimized experimental conditions, the enrichment factors of the method for the analytes were in the range from 574 to 968; the linearities of the method ranged from 0.01 to 10.0 μg/L for simazine, propazine, metribuzin, simetryn and cyanazine, from 0.05 to 10.0 μg/L for atrazine and from 0.01 to 8.0 μg/L for prometryn, with the correlation coefficients (r) ranging from 0.9968 to 0.9998. The limits of detection were in the range between 1.0 and 5.0 ng/L. Good reproducibilities were obtained with the relative standard deviations below 10.5%. The developed method was applied to the analysis of the triazine herbicides in different water samples (lake, well and tap). The recoveries of the method were in the range from 79.8% to 118.3% at the spiked levels of 0.5 μg/L and 2.0 μg/L. The results indicated that the developed method can be used as a simple and efficient technique for the determination of the triazine herbicides in environmental water samples.

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Solvent demulsification-dispersive liquid-liquid microextraction based on solidification of floating organic drop coupled with gas chromatography-mass spectrometry for simultaneous determination of organochlorine pesticides in aqueous samples WANG Yu, ZHU Chenghua, ZOU Xiaoli, HUANG Lizhi, YAN Dong 2013, 31 (11):  1076-1080.  DOI: 10.3724/SP.J.1123.2013.06008 Abstract ( 985 )   [Full Text(HTML)] () PDF (787KB) ( 206 )   A novel method for simultaneous determination of eight organochlorine pesticides in aqueous samples by solvent demulsification-dispersive liquid-liquid microextraction based on solidification of floating organic drop coupled with gas chromatography-mass spectrometry (GC-MS) was established. A mixture of extractant (n-hexadecane) and dispersive agent (acetone) at the ratio of 1/5 (v/v) was injected into aqueous sample to form an emulsion and an extraction process was accomplished. The demulsifier (750 μ L acetone) was then injected to break up the emulsion. The two phases were separated quickly without centrifugation. After being solidified in an ice-bath, the upper layer (n-hexadecane) was transferred into an Eppendorf tube and analyzed by GC-MS after melted at room temperature. Factors affecting extraction efficiency such as the type and volume of extractant, dispersive agent and demulsifier, also ionic strength and pH value of extraction system were studied. Under the optimized conditions, the working curve of the proposed method provided a good linearity in the range of 0.025-2.00 μg/L (r=0.9995-0.9999). The detection limits of the organochlorine pesticides calculated by Hubaux-Vos method were 0.012-0.024 μg/L and the relative standard deviations (RSDs) ranged from 3.15% to 4.53%. The enrichment factors (EF) were 96-101. When the method was applied to the determination of farmland water, the average spiked recoveries were 96.77%-102.93% with the relative standard deviations of 2.68%-4.86%. The proposed method is sensitive and fast. It also has the advantage of little organic solvent consumption so that it is friendly to environment and suitable for batch analysis of organochlorine pesticides in aqueous samples. Meanwhile, it provides technical and methodological support for achieving the automation of sample pretreatment.

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Determination of 21 phenolic compounds in soil by ultrasonic extraction-gas chromatography YANG Lili, WANG Meifei, HU Enyu, LIU Jing, WU Lijuan 2013, 31 (11):  1081-1086.  DOI: 10.3724/SP.J.1123.2013.05005 Abstract ( 1309 )   [Full Text(HTML)] () PDF (776KB) ( 475 )   An effective method was developed to determine phenolic compounds in soil by ultrasonic extraction-gas chromatography (GC). The soil sample was extracted with methylene dichloride-hexane (2:1, v/v) for 3 min with the extraction temperature lower than 50 ℃ for 3 times. The extract was purified by alkaline aqueous solution (pH >12), and the phenolic compounds were dissolved in aqueous solution. After the organic solution was discarded, the aqueous solution was adjusted to pH<3 and subsequently extracted with methylene dichloride-ethyl acetate (4:1, v/v) twice. The analytes were determined by GC-FID and quantified by external standard method. The limits of quantification for all tested phenolic compounds were 0.01-0.06 mg/kg in about 10 g soil samples. The recoveries were between 62.9% and 111.4% with the relative standard deviations (RSDs) in the range of 4.3%-24.0% (n=6). The results showed that this method is sensitive, accurate, and suitable for the determination of the 21 phenolic compounds in soil.

Technical Notes

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Exploration of toxicity reducing mechanism of aconite alkaloids during decoction process using liquid chromatography-mass spectrometry CHEN Ping, CHEN Yimin, CHEN Jia, TONG Hongbin, XU Zhiliang 2013, 31 (11):  1087-1092.  DOI: 10.3724/SP.J.1123.2013.05042 Abstract ( 943 )   [Full Text(HTML)] () PDF (790KB) ( 212 )   A high performance liquid chromatography-electrospray ionization mass spectrometry method was developed for the determination of aconite alkaloids. It was used to investigate the degradation of alkaloids of Radix Aconiti Lateralis Preparata during decoction. Six alkaline degradation products were identified, and the degradation regularity of diester-diterpenoid alkaloids was confirmed during the test using standards. The dynamic changes of the amount of aconite alkaloids in the decoction of Radix Aconiti Lateralis Preparata were supervised. Along with the increase of decoction time, the concentrations of diester-diterpenoid alkaloids and lipo-alkaloid decreased significantly. The results can provide a scientific basis for the safety use of aconite.

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Determination of alditols in foods by ion chromatography-mass spectrometry ZHOU Hongbin, XIONG Zhiyu, LI Ping, LI Jing, SUN Li, ZHAO Yunxia 2013, 31 (11):  1093-1101.  DOI: 10.3724/SP.J.1123.2013.05008 Abstract ( 1046 )   [Full Text(HTML)] () PDF (2999KB) ( 237 )   A method for the determination of alditols in foods by ion chromatography-mass spectrometry (IC-MS) has been developed. The samples were extracted and cleaned up with the solid phase extraction (SPE). Then, the ion chromatographic separation was performed on a CarboPar MA1 column. The alditols were determined by MS with the selected ion monitoring (SIM) mode and quantified by the external standard method. The calibration curves showed good linearity in the certain ranges with the correlation coefficients (R2) greater than 0.99. The limits of quantification (S/N=10) of erythritol, xylitol, D-sorbitol, D-mannitol, lactitol, maltitol were 0.98, 1.99, 2.24, 5.92, 13.56, 13.21 mg/kg and the limits of detection (S/N=3) were 0.28, 0.59, 0.71, 1.74, 4.14, 4.03 mg/kg, respectively. The spiked recoveries of the alditols in the foods at different levels were in the range of 82.5%-108.0% with the relative standard deviations (RSDs) of 1.5%-7.6%. The sensitivity, accuracy and precision of the method meet the technical standards of the determination. The method can be applied to the determination of alditols in foods.

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Simultaneous determination of four common nonprotein nitrogen substances in urine by high performance liquid chromatography MA Yuhua, HUANG Dongqun, ZHANG Rui, XU Shiru, FENG Shun 2013, 31 (11):  1102-1105.  DOI: 10.3724/SP.J.1123.2013.07033 Abstract ( 1159 )   [Full Text(HTML)] () PDF (732KB) ( 372 )   A high performance liquid chromatographic (HPLC) method was proposed to simultaneously determine four common nonprotein nitrogen substances, including creatine (Cr), creatinine (Cn), uric acid (Ua) and pseudouridine (Pu) in urine. After proteins being removed by acetone precipitation method, freeze drying and redissolving, the urine samples were analyzed by HPLC. Chromatographic separation was performed on a Waters RP18 Column (150 mm×4.60 mm, 3.5 μm) in gradient elution mode using 10.0 mmol/L KH2PO4 solution (pH 4.78) and acetonitrile as mobile phases at a flow rate of 0.8 mL/min. The samples were detected at 220 nm. Rapid separation was achieved within 7 min. Under the optimized conditions, good linearities of four common nonprotein nitrogen substances were obtained in the range of 0.1-250 mg/L. The detection limits were 9.31 (Cr), 26.19 (Cn), 4.70 (Ua), and 6.30 (Pu) μg/L and the recoveries were in the range of 81%-111% with the relative standard deviations of 0.23%-2.78% (n=3). The results demonstrate that this method is simple, rapid and accurate with good reproducibility, and can provide early diagnosis and preliminary judgment for type 2 diabetes mellitus (T2DM) patients with renal damage.

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Simultaneous determination of 10 synthetic colorants in cosmetics by high performance liquid chromatography LIU Haishan, QIAN Xiaoyan, LÜ Chunhua, ZHU Xiaoyu, CHEN Xiaomei, MO Weimin 2013, 31 (11):  1106-1111.  DOI: 10.3724/SP.J.1123.2013.05018 Abstract ( 1021 )   [Full Text(HTML)] () PDF (797KB) ( 473 )   A high performance liquid chromatographic method was developed for the simultaneous determination of 10 synthetic colorants in cosmetics. The cosmetics were extracted by the ultrasonic technique with tetrahydrofuran (THF), dimethyl sulfoxide (DMSO) and methanol sequentially. Then the extracts were centrifuged for purification and separated on an Eclipse XDB-C18 column (150 mm×4.6 mm, 5 μm) with gradient elution by acetonitrile and 0.02 mol/L ammonium acetate (pH 4.60, adjusted with acetic acid). A diode array detector was used to determine the colorants with the wavelengths ranging from 417 nm to 640 nm. The linear relationships of the 10 colorants between the peak areas and the mass concentrations were obtained in the range of 0.5-20.0 mg/L (r >0.999). The limits of quantitation ranged from 10 to 20 mg/kg. The average recoveries at three concentration levels ranged from 92.9% to 108.8% with the relative standard deviations in the range of 0.5% to 6.1% (n=6). The method is simple, rapid and sensitive. It is suitable for the simultaneous determination of the 10 colorants in the oil cosmetics, cream cosmetics and powder cosmetics.

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Analysis of amines in water samples by high performance liquid chromatography-laser induced fluorescence detection LIU Fan, GAO Fangyuan, TANG Tao, SUN Yuanshe, LI Tong, ZHANG Weibing 2013, 31 (11):  1112-1115.  DOI: 10.3724/SP.J.1123.2013.09035 Abstract ( 869 )   [Full Text(HTML)] () PDF (749KB) ( 103 )   A sensitive high performance liquid chromatography (HPLC)-laser induced fluorescence detection (LIFD) method was developed for the determination of amines. The derivatization and separation conditions were investigated. Under the optimized conditions, spermidine, putrescine and histamine were analyzed. The limits of detection (LODs) of the three biogenic amines (S/N=3) were as low as 10-10 mol/L. This method showed excellent stability. The RSDs of retention times and peak areas of the three biogenic amines were lower than 0.3% and 3%, respectively. This method was applied in biogenic amine analysis in water samples, and the average recoveries were in the range of 94.99%-104.7%. Furthermore, the amines in seven tea samples were analyzed by this method, and satisfactory results were achieved. The developed assay is of excellent sensitivity and good reproducibility, which can be used in the analysis of the amines in water samples.

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Comparison of three different QuEChERS sample treatment methods in the analysis of more than one hundred pesticide residues in tobacco by gas chromatography- tandem mass spectrometry CHEN Xiaoshui, BIAN Zhaoyang, YANG Fei, LIU Shanshan, TANG Gangling, HU Qingyuan 2013, 31 (11):  1116-1128.  DOI: 10.3724/SP.J.1123.2013.03044 Abstract ( 1371 )   [Full Text(HTML)] () PDF (1565KB) ( 367 )   With a combination of QuEChERS method and gas chromatography-tandem mass spectrometry (GC-MS/MS) technique, three sample treatment methods (solvent exchange method, toluene dilution method, hexane liquid-liquid extraction method) were established to analyse more than one hundred pesticide residues in tobacco. The 155 pesticide analytes contained 58 organophosphorus, 28 organochlorine, 10 pyrethroids, 10 acyl amide, 11 carbamate, 7 dinitroaniline and 31 other family pesticides. Comparison of the three treatment methods was investigated on performances including matrix effect, co-extracted matrix, peak interference, recovery and the limit of quantification (LOQ). The hexane liquid-liquid extraction method gave the cleanest extract but poorer recovery; the solvent exchange and toluene dilution method could guarantee recoveries in the range of 70% and 120% for most of the 155 pesticides. We found that organophosphorus, acyl amide and carbamate pesticides exhibited relative strong matrix effects compared with organochlorine and pyrethroid pesticides. Toluene dilution method was recommended to analyse organophosphorus pesticides, and hexane liquid-liquid extraction (LLE) method was recommended to analyse organochlorine and pyrethroid pesticides.

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Simultaneous determination of ethyl carbamate and chloropropanols in flavorings by gas chromatography- triple quadrupole tandem mass spectrometry XU Xiaomin, HE Huali, RUAN Yudi, HUANG Baifen, ZHANG Jingshun, CAI Zengxuan, REN Yiping 2013, 31 (11):  1129-1133.  DOI: 10.3724/SP.J.1123.2013.06006 Abstract ( 1037 )   [Full Text(HTML)] () PDF (762KB) ( 287 )   A simultaneous determination method for ethyl carbamate (EC) and chloropropanols (3-monochloropropane-1,2-diol (3-MCPD) and 2-monochloropropane-1,3-diol (2-MCPD)) in flavorings was developed by gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS/MS). After spiked with internal standard, the sample was extracted by matrix solid-phase dispersion extraction technique with an ExtrelutTM NT column. Hexane was used to wash the fat soluble matrix interferences and then an ethyl acetate-ethyl ether (20:80, v/v) mixture was added to elute the analytes. The concentrated extract was detected by GC-MS/MS in multiple reaction monitoring (MRM) mode. The limits of detection (LODs) were 2, 5 and 5 μg/kg for EC, 3-MCPD and 2-MCPD, respectively. The linear ranges were 5-1000 μg/kg (r=0.9997), 10-1000 μg/kg (r=0.9991) and 10-1000 μg/kg (r=0.9995) for EC, 3-MCPD and 2-MCPD, respectively. In soy sauce, yellow rice wine, salami sauce and flavoring of instant noodle matrices, the recoveries (RSDs, n=7) in MRM mode at the levels of 20, 100 and 400 μg/kg were 87.7%-104% (4.3%-10.7%), 90.1%-109% (2.6%-10.2%), and 90.9%-103% (3.0%-9.5%), respectively. EC, 3-MCPD and 2-MCPD were found in some real samples of the soy sauce, wine and flavoring of instant noodle. EC or 3-MCPD was found in some of the salami samples. The method is accurate, fast and suitable for the simultaneous determination of EC, 3-MCPD and 2-MCPD in flavorings.

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Characterization of C5-C7 alkenes in gasoline from methanol to olefins process using gas chromatography-mass spectrometry LI Jiwen, LI Wei, WANG Chuan 2013, 31 (11):  1134-1139.  DOI: 10.3724/SP.J.1123.2013.05047 Abstract ( 885 )   [Full Text(HTML)] () PDF (772KB) ( 444 )   Gas chromatography-mass spectrometry (GC-MS) qualitative characterization of C5-C7 alkenes in gasoline from methanol to olefins (MTO) was investigated in detail. It showed that the retention indices of 49 alkenes, 11 alkadienes and 9 cycloalkenes, a total of 69 C5-C7 isomeric alkenes were determined and qualitatively confirmed. The retention indices of all C5-C7 alkenes in MTO gasoline were measured on polydimethylsiloxane as the stationary phase. According to the library of retention indices by GC-MS characterization, the contents of C5-C7 alkenes in MTO gasoline were analyzed by GC and characterized by its composition of hydrocarbon categories. The results of quantitative analysis showed that the composition of MTO gasoline mainly consisted of C5-C7 alkenes, and a small amount of alkadienes and cycloalkenes. The contents of alkanes and cycloalkanes existed in MTO gasoline were very low. The study of the composition is helpful for the comprehensive application of MTO gasoline.