Measurement Significance: Soil mercury pollution can threaten plants, animals and human health through food chain transfer and enrichment.Mine development, industrial processing, agricultural production and domestic waste often cause soil mercury pollution, so evaluating and preventing soil heavy metal pollution often requires determination of soil mercury content.

Determination principle: After the soil is digested, mercury is present in Hg2 + ionic form; Hg2 + can form an orange complex with disulfide 腙, dissolve in trichloromethane, to measure absorbance at 490 nm, can calculate S-Hg content.

Required instruments, supplies: UV spectrometer / enzyme label, trace glass cuvette / 96-well plate, constant temperature water bath, adjustable pipette, 100 mesh screen (smaller),Concentrated sulfuric acid, concentrated hydrochloric acid, concentrated nitric acid, trichloromethane and distilled water.

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