Measurement Significance: HG2 + is an important toxic metal ion in the water body, which is easily absorbed and accumulated by organisms, which can be further transmitted through the food chain, thereby causing injury.Typical water is a kind of mercury poisoning.

Determination Principle: After the water S is digestion, Hg2 + can form an orange complex with dithiara and dissolve in trichloromethane, and the Hg2 + content can be calculated from chloroform and dissolve the absorbance at 490 nm.

Instruments, consumables, consumables: constant temperature water bath, adjustable pipette, concentrated sulfuric acid, trichloromethane, visible spectrophotometer / enzyme symbol, trace quantine-based cuvette / 96-well plate, and distilled water.

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