Chinese Journal of Chromatography ›› 2020, Vol. 38 ›› Issue (1): 143-148.DOI: 10.3724/SP.J.1123.2019.06022
PENG Zifang1, LI Qin2,3, ZHANG Guangrui1, ZHAO Wuduo1, LIAN Hongzhen3, ZHANG Shusheng1,*()
Received:
2019-06-25
Online:
2020-01-08
Published:
2020-12-11
Contact:
ZHANG Shusheng
Supported by:
PENG Zifang, LI Qin, ZHANG Guangrui, ZHAO Wuduo, LIAN Hongzhen, ZHANG Shusheng. Solid phase extraction and high performance liquid chromatography with tetraaza[2]arene[2]triazine-bonded silica gel adsorbent for determination of nitrophenols and diethylstilbestrol in river water[J]. Chinese Journal of Chromatography, 2020, 38(1): 143-148.
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URL: https://www.chrom-china.com/EN/10.3724/SP.J.1123.2019.06022
Fig. 1 Chromatogram of the mixture of four phenolic substances Conditions: C8 column (250 mm×4.6 mm, 5 μm); mobile phase A, methanol; mobile phase B, 0.1% (v/v) phosphoric acid solution; the elution program: 0-11 min, 40%B; 11-15 min, 40%B-80%B; 15-20 min, 80%B; flow rate, 1.0 mL/min; detection wavelength, 254 nm; injection volume, 20 μL; column temperature, 30 ℃.Peaks: 1. 2, 4, 6-trinitrophenol; 2. p-nitrophenol; 3. 2, 4-dinitrophenol; 4. diethylstilbestrol.
Fig. 2 Effects of (a) eluent dosage, (b)loading volume, (c) sample pH, (d) loading rate, and (e) reusable time on the recoveries of the four phenolic substances
Analyte | Regression equation | R2 | LOD/ (μg/L) | LOQ/ (μg/L) |
y: peak area; x: mass concentration, μ g/L. | ||||
p-Nitrophenol | y=55.995x-0.5002 | 0.9993 | 0.300 | 1.00 |
2, 4-Dinitrophenol | y=369.96x+1.4519 | 0.9995 | 0.100 | 0.300 |
2, 4, 6-Trinitrophenol | y=22.786x+4.1287 | 0.9999 | 0.030 | 0.100 |
Diethylstilbestrol | y=51.349x+0.2886 | 0.9998 | 0.030 | 0.100 |
Table 1 Linear regression equations, correlation coe- fficients (R2), limits of detection(LODs) and limits of quantification (LOQs)
Analyte | Regression equation | R2 | LOD/ (μg/L) | LOQ/ (μg/L) |
y: peak area; x: mass concentration, μ g/L. | ||||
p-Nitrophenol | y=55.995x-0.5002 | 0.9993 | 0.300 | 1.00 |
2, 4-Dinitrophenol | y=369.96x+1.4519 | 0.9995 | 0.100 | 0.300 |
2, 4, 6-Trinitrophenol | y=22.786x+4.1287 | 0.9999 | 0.030 | 0.100 |
Diethylstilbestrol | y=51.349x+0.2886 | 0.9998 | 0.030 | 0.100 |
Sample | Analyte | Background/ (μg/L) | Spiked level/ (μg/L) | Found/ (μg/L) | Recovery/ % | RSD/ % |
-: not detected | ||||||
Yellow River water | p-nitrophenol | 1.50 | 1.00 | 2.28 | 78.0 | 5.60 |
2.00 | 3.01 | 75.5 | 5.40 | |||
10.00 | 9.07 | 75.7 | 6.30 | |||
2, 4-dinitrophenol | - | 2.00 | 1.69 | 84.5 | 3.61 | |
5.00 | 4.25 | 85.0 | 2.20 | |||
10.00 | 8.84 | 88.4 | 4.83 | |||
2, 4, 6-trinitrophenol | 1.40 | 1.00 | 2.28 | 88.0 | 2.43 | |
2.00 | 3.08 | 84.3 | 1.90 | |||
10.00 | 9.36 | 79.6 | 3.42 | |||
diethylstilbestrol | 0.24 | 0.50 | 0.68 | 88.0 | 3.40 | |
2.00 | 2.32 | 104.2 | 5.20 | |||
10.0 | 9.59 | 93.4 | 4.11 | |||
Jinshui River water | p-nitrophenol | 1.20 | 1.00 | 2.01 | 81.2 | 3.11 |
2.00 | 2.56 | 80.1 | 5.10 | |||
5.00 | 4.80 | 77.4 | 2.00 | |||
2, 4-dinitrophenol | 2.30 | 2.00 | 2.95 | 86.2 | 3.67 | |
4.00 | 5.65 | 83.8 | 3.40 | |||
10.00 | 10.75 | 84.5 | 5.52 | |||
2, 4, 6-trinitrophenol | 2.60 | 2.00 | 4.31 | 85.5 | 2.43 | |
4.00 | 5.84 | 81.0 | 2.80 | |||
10.00 | 11.80 | 92.0 | 4.30 | |||
diethylstilbestrol | 1.60 | 0.50 | 2.04 | 87.7 | 4.22 | |
2.00 | 3.42 | 91.1 | 3.08 | |||
10.00 | 10.58 | 89.8 | 2.82 |
Table 2 Recoveries and RSDs of the four phenols in different environmental water samples(n=5)
Sample | Analyte | Background/ (μg/L) | Spiked level/ (μg/L) | Found/ (μg/L) | Recovery/ % | RSD/ % |
-: not detected | ||||||
Yellow River water | p-nitrophenol | 1.50 | 1.00 | 2.28 | 78.0 | 5.60 |
2.00 | 3.01 | 75.5 | 5.40 | |||
10.00 | 9.07 | 75.7 | 6.30 | |||
2, 4-dinitrophenol | - | 2.00 | 1.69 | 84.5 | 3.61 | |
5.00 | 4.25 | 85.0 | 2.20 | |||
10.00 | 8.84 | 88.4 | 4.83 | |||
2, 4, 6-trinitrophenol | 1.40 | 1.00 | 2.28 | 88.0 | 2.43 | |
2.00 | 3.08 | 84.3 | 1.90 | |||
10.00 | 9.36 | 79.6 | 3.42 | |||
diethylstilbestrol | 0.24 | 0.50 | 0.68 | 88.0 | 3.40 | |
2.00 | 2.32 | 104.2 | 5.20 | |||
10.0 | 9.59 | 93.4 | 4.11 | |||
Jinshui River water | p-nitrophenol | 1.20 | 1.00 | 2.01 | 81.2 | 3.11 |
2.00 | 2.56 | 80.1 | 5.10 | |||
5.00 | 4.80 | 77.4 | 2.00 | |||
2, 4-dinitrophenol | 2.30 | 2.00 | 2.95 | 86.2 | 3.67 | |
4.00 | 5.65 | 83.8 | 3.40 | |||
10.00 | 10.75 | 84.5 | 5.52 | |||
2, 4, 6-trinitrophenol | 2.60 | 2.00 | 4.31 | 85.5 | 2.43 | |
4.00 | 5.84 | 81.0 | 2.80 | |||
10.00 | 11.80 | 92.0 | 4.30 | |||
diethylstilbestrol | 1.60 | 0.50 | 2.04 | 87.7 | 4.22 | |
2.00 | 3.42 | 91.1 | 3.08 | |||
10.00 | 10.58 | 89.8 | 2.82 |
Fig. 3 Chromatograms of the real river water samples and spiked samples treated with SPE a. Yellow River water sample; b. the spiked Yellow River water sample; c. Jinshui River water sample; d. the spiked Jinshui River water sample.Conditions are the same as in Fig. 1.
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