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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Chen, Zhong-lin Bu, Yuan-qin Wu, Xiang-yang Liu, Jing-fu Zhou, Kai Zhang, Zhen Shan, Zheng-jun Yang, Liu-qing |
| Copyright Year | 2012 |
| Abstract | Temperature-controlled ionic liquid dispersive liquid–liquid microextraction (TC-IL-DLLME) was introduced to analyze malachite green (MG) and crystal violet (CV) in environmental water by coupling with high performance liquid chromatography (HPLC). In the method, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8MIM][PF6]) and methanol were selected as appropriate extraction and dispersive solvents, respectively. Target compounds were extracted into the IL phase (dispersed completely in the aqueous phase) at a proper temperature. Several other parameters that could affect extraction performance were optimized, such as IL volume, sample pH, salinity, extraction time, temperature and centrifuging velocity. Under the optimum conditions (IL volume, 80 μL; sample pH, 4; salinity, 20% sodium chloride; extraction time, 50 min; temperature, 70 °C; centrifuging velocity, 1500 rpm), the established method offered: (i) good linear range (0.25–20 μg L−1); (ii) low detection limits (MG, 0.086 μg L−1; CV, 0.030 μg L−1); (iii) good reproducibility (relative standard deviation, MG, 9.4%; CV, 7.6%; n = 5) and good recoveries (91.7% for MG and 97.2% for CV, respectively; n = 5); (iv) high enrichment factor (254 for MG, 276 for CV), which makes the method suitable to monitor low concentrations of MG and CV in aqueous systems. |
| Starting Page | 429 |
| Ending Page | 433 |
| Page Count | 5 |
| File Format | HTM / HTML PDF |
| ISSN | 17599660 |
| Volume Number | 4 |
| Issue Number | 2 |
| Journal | Analytical Methods |
| DOI | 10.1039/c2ay05665h |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Hexafluorophosphate Crystal violet PH High-performance liquid chromatography Sodium chloride Coefficient of variation Malachite Ionic liquid MG Cars Methanol Salinity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Analytical Chemistry Engineering Chemical Engineering |
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