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原“砷”的比浊法分析是在6N盐酸溶液中,以硫酸铜作催化剂,用次磷酸钠将砷还原成红棕色胶体于50ml比色管中进行比色的,由于比色时的体积大,消耗盐酸多,操作很不方便等缺点,为此我们进行了改进。操作:称样0.2g,加2gNa_2O_2熔融后浸取于水并稀至50ml中,过夜澄清,然后取10ml清液于25ml比色管中,加0.5ml4%硫酸铜,2ml60%次亚磷
The original “arsenic” nephelometry analysis is in 6N hydrochloric acid solution, copper sulfate as a catalyst, sodium hypophosphite arsenic reduction to reddish brown colloid 50ml colorimetric tube for colorimetric, due to the colorimetric volume Large, consume more hydrochloric acid, the operation is very inconvenient and other shortcomings, for which we have made improvements. Operation: Weigh 0.2g, add 2gNa_2O_2 after leaching melted in water and dilute to 50ml, clear overnight, and then take 10ml of the supernatant in 25ml colorimetric tube, add 0.5ml4% copper sulfate, 2ml 60%