Chinese Journal of Chromatography ›› 2020, Vol. 38 ›› Issue (2): 195-205.DOI: 10.3724/SP.J.1123.2019.05045
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YANG Xiaohan, WU Wenqian, WANG Bin, LIN Feng, WU Xiaohai, LU Xin()
Received:
2019-05-30
Online:
2020-02-08
Published:
2020-12-10
Contact:
LU Xin
Supported by:
YANG Xiaohan, WU Wenqian, WANG Bin, LIN Feng, WU Xiaohai, LU Xin. Preparation of magnetic metal-organic frameworks-polydopamine for extraction and detection of cationic dyes from water samples in a fishery[J]. Chinese Journal of Chromatography, 2020, 38(2): 195-205.
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URL: https://www.chrom-china.com/EN/10.3724/SP.J.1123.2019.05045
Fig. 1 Schemes of (a) synthesis of Fe3O4@Z67D and (b) MSPE process PEG: polyethylene glycol; EG: ethylene glycol; PDA: polydopamine; MSPE: magnetic solid-phase extraction.
Fig. 3 Scanning electron microscope images of (a) Fe3O4, (b) Fe3O4@ZIF-67, (c) Fe3O4@Z67D and transmission electron microscopy images of (d) Fe3O4@ZIF-67 and (e, f) Fe3O4@Z67D
Fig. 5 X-ray photoelectron spectroscopy full-scan analysis of (a) Fe3O4@Z67D and high resolution X-ray photoelectron spectroscopy analysis of (b) Fe 2p, (c) Co 2p, (d) O 1s, (e)C 1s and (f) N 1s
Fig. 8 Effects of (a) the amount of Fe3O4@Z67D, (b) the extraction time, (c) the volume and (d) pH of sample solution, and (e) the type and (e) volume of the eluent solvents on the recoveries of the two dyes (n=3) MeOH: methanol; ACN: acetonitrile; HAc: acetic acid.
Analyte | Regression equation | Linear range/(μg/L) | R2 | LOD/(μg/L) | RSD/%(n=5) | Enrichment factor |
Y: peak area; X: mass concentrition, μg/L. | ||||||
MB | Y=6.0×104X-2.8×104 | 0.5-200 | 0.9999 | 0.04 | 1.2 | 777 |
CV | Y=1.0×105X+6.2×103 | 0.01-50 | 0.9998 | 0.008 | 3.6 | 688 |
Table 1 Analytical performance data of the MSPE-HPLC method for the determination of the two dyes
Analyte | Regression equation | Linear range/(μg/L) | R2 | LOD/(μg/L) | RSD/%(n=5) | Enrichment factor |
Y: peak area; X: mass concentrition, μg/L. | ||||||
MB | Y=6.0×104X-2.8×104 | 0.5-200 | 0.9999 | 0.04 | 1.2 | 777 |
CV | Y=1.0×105X+6.2×103 | 0.01-50 | 0.9998 | 0.008 | 3.6 | 688 |
Analyte | Added/(μg/L) | Found/(μg/L) | Recovery/% | RSD/% |
-: not applicable. | ||||
MB | 0 | 0.7 | -- | |
1 | 0.9 | 88.6 | 2.3 | |
10 | 9.0 | 90.3 | 2.9 | |
CV | 0 | 0.2 | -- | |
5 | 5.5 | 109.0 | 2.2 | |
50 | 41.0 | 82.0 | 1.4 |
Table 2 Analytical results of MB and CV in fishpond water samples and the spiked recoveries (n=5)
Analyte | Added/(μg/L) | Found/(μg/L) | Recovery/% | RSD/% |
-: not applicable. | ||||
MB | 0 | 0.7 | -- | |
1 | 0.9 | 88.6 | 2.3 | |
10 | 9.0 | 90.3 | 2.9 | |
CV | 0 | 0.2 | -- | |
5 | 5.5 | 109.0 | 2.2 | |
50 | 41.0 | 82.0 | 1.4 |
Fig. 10 Chromatograms obtained from fishpond water samples treated after MSPE a. blank sample; b. sample spiked with 10 μg/L MB and 5 μg/L CV.Conditions: SpursilTM C18 column(250 mm×4.6 mm, 5 μm); mobile phase, methanol-0.0125 mol/L ammonium acetate buffer solution (85:15, v/v)(pH adjusted to 4.5 by acetic acid); flow rate, 1.0 mL/min; detection wavelength, 580 nm; injection volume, 20 μL; column temperature, 35 ℃.
Method | Matrix | Linear range/(μg/L) | LOD/(μg/L) | Recovery/% | RSD/% | Reference | |||
MB | CV | MB | CV | ||||||
PLS-1: partial least squares method; NACE: non-aqueous capillary electrophoresis; ED: electrochemical detection; -: not available; *: μg/kg. | |||||||||
SPE-UPLC-MS-MS | silver carp | 5.0-200 | 2.5-100 | 0.30* | 0.15* | 75.4-87.8 | 4.33-10.4 | [ | |
SPE-UV/PLS-1 | stream water | 150-8000 | 120-8000 | 48 | 28 | 79.8-83.6 | 2.3-4.2 | [ | |
SPE-NACE-ED | river and lake water | 100-700 | 100-700 | 0.13 | 0.11 | 43-98 | - | [ | |
MSPE-HPLC-UV | fishpond water | 0.5-200 | 0.01-50 | 0.04 | 0.008 | 82.0-109.0 | 1.4-2.9 | this work |
Table 3 Comparison of this method with reported methods
Method | Matrix | Linear range/(μg/L) | LOD/(μg/L) | Recovery/% | RSD/% | Reference | |||
MB | CV | MB | CV | ||||||
PLS-1: partial least squares method; NACE: non-aqueous capillary electrophoresis; ED: electrochemical detection; -: not available; *: μg/kg. | |||||||||
SPE-UPLC-MS-MS | silver carp | 5.0-200 | 2.5-100 | 0.30* | 0.15* | 75.4-87.8 | 4.33-10.4 | [ | |
SPE-UV/PLS-1 | stream water | 150-8000 | 120-8000 | 48 | 28 | 79.8-83.6 | 2.3-4.2 | [ | |
SPE-NACE-ED | river and lake water | 100-700 | 100-700 | 0.13 | 0.11 | 43-98 | - | [ | |
MSPE-HPLC-UV | fishpond water | 0.5-200 | 0.01-50 | 0.04 | 0.008 | 82.0-109.0 | 1.4-2.9 | this work |
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