Spectrophotometric determination of cadmium with dithizone

3 Spectrophotometric determination of cadmium with dithizone General remarks 

In virtually neutral to alkaline solution with dithizone (HDz), cadmium ions 

Its solubility is greater in chloroform than in carbon tetrachloride. The CdDz2/ CHCL3 solution is more stable than the CdDz2/CClz solution. 

The formation of di-dithizonate takes place quickly and quantitatively in 

Where the water sample contains substantial quantities of organic substances (permanganate consumption in excess of 30 mg/1), such substances are eliminated by concentrating the sample by evaporation and fuming off with the addition of 5 mi of reagent-purity sulphuric acid (1.8 g/ml) and 5 ml 

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