| Autor: |
WANG Su-li, CAO Jun, DING Wei, PAN Xin-liang, SHI Qing-dong, LI Zhi |
| Jazyk: |
English<br />Chinese |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Shipin yu jixie, Vol 39, Iss 7, Pp 68-72,151 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1003-5788 |
| DOI: |
10.13652/j.spjx.1003.5788.2022.80933 |
| Popis: |
Objective: This study aimed to improve the safety supervision of cadmium in milk samples. Methods: A liquid-liquid microextraction method based on hydrophobic deep eutectic solvent （DES） was developed for the determination of cadmium in milk samples by graphite furnace atomic absorption spectrometry. The types of deep eutectic solvents were selected for high extraction efficiencies and it was found that DES composed of thymol and lactic acid at the molar ratio of 1∶1 provided higher extraction efficiency. In addition, several important experimental conditions including the volume of DES, sample pH value, the pretreatment methods of samples were optimized. Results: Under the optimized conditions, Cd had good linearity in the range of 0~3.0 ng/mL, and the correlation coefficient was 0.998. The detection limit was 0.02 μg/kg. The recoveries ranged from 94.7% to 113.0% with relative standard deviations （RSD） of 0.38%~7.00%. Conclusion: With the advantages of simplicity, rapidness, exactness and low detection limit, this method could be used for the detection of cadmium in milk samples. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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