Abstract：Based on the color reaction of mercury with 5-(2-hydroxy-4-sulfo-5-chlorophenol-1-azo)-thiorhodanine (HSTC) and the solid phase extraction of the colored complex with C18 cartridge, a new method for the determinations μg·L-1 level of mercury was studied. In the presence of pH 3.6 HAc-NaAc buffer solution. HSTC reacted with mercury (Ⅱ) to form a stable 2∶1 complex. This complex was enriched by solid phase extraction with C18 cartridge and the retained complex from cartridge was elｕted with DMF. An enrichment factor of 80 was achieved. In the measured solution, the molar absorptivity was 6.24×104 L·moL-1·cm-1 at 545 nm. Beer’s law was obeyed in the range of 0-1.5 μg·mL-1. This method was applied to the determination of mercury in water. The relative standard devitions were 1.8%-2.2% and the recoveries were 93％-106％. The results are satisfactory.
羊 波1, 周丽琼1, 尹家元2 . 氯磺酚偶氮硫代若丹宁固相萃取光度法测定水中的汞 [J]. 光谱学与光谱分析, 2004, 24(09): 1110-1112.
YANG Bo1, ZHOU Li-qiong1, YIN Jia-yuan2 . Study on the Solid Phase Extraction Spectrophotometric Determination of Mercury in Water with 5-(2-Hydroxy-4-Sulfo-5-Chlorophenol-1-Azo)-Thiorhodanine . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(09): 1110-1112.
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