Chemical Name: Diethyldithiocarbamic acid, silver salt
Appearance: Yellow powderPurity: ≥98.0% (Titration)MW: 256.14, C5H10AgNS2 Storage Condition: ambient temperature, protect from light
Shipping Condition: ambient temperature
Arsemate is soluble in pyridine and chloroform, but insoluble in water and other organic solvents. For arsenic detection, a 0.5% Arsemate/pyridine solution is used. The sample should be treated with sulfuric acid, 15% potassium iodide, and 40% SnCl2/HCl solution to convert arsenic to AsH3. Arsemate reacts with AsH3 in pyridine and forms red colloidal silver with a maximum wavelength at 520-540 nm. The detection range of arsenic using the Arsemate/pyridine solution is 4-12 ppm. Alternatively, 0.5% Arsemate/chloroform solution with 30 mM triethylamine can be used for the assay. For the colorimetric detection of arsenic, the AsH3 gas generator is required.
1. A. G. Howard, et al., Sequential Spectrophotometric Determination of Inorganic Arsenic(III) and Arcenic(V) Species. Analyst. 1980;105:338-343.