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汞矿中汞的测定,一般常用的是沙乌柯夫蒸馏容量法.此法在蒸馏过程中汞不能完全蒸发且冷凝不彻底,致使结果偏低,又测定范围窄、劳动强度大、汞害严重等.我们通过试验,拟定了1:1逆王水溶样,用酒石酸于碱性溶液中络合铁,在四氯化碳存在下,用铜试剂溶液萃取滴定。测定手续: 称取0.1—1克试样于50毫升锥瓶中,加1:1逆王水10毫升,盖上小漏斗,置电热板上加热至微沸10分钟。取下洗净小漏斗,快速过滤于250升锥瓶中,用水洗3—5次,控制总体积约50毫升。加5毫升10％酒石酸溶液、1毫升0.01％醋酸铜溶液,用1:1氨水调节pH>8、液色变化
Determination of mercury in mercury ores, the commonly used is the Sauvignon distillation capacity method. This method in the distillation process of mercury can not be completely evaporated and the condensation is not complete, resulting in low results, and the determination of narrow range, labor-intensive, mercury damage Serious, etc. We passed the test, developed a 1: 1 inverse aqua regia samples, tartaric acid complexed with iron in alkaline solution, in the presence of carbon tetrachloride, copper reagent solution extraction titration. Determination procedures: Weigh 0.1-1 g sample in 50 ml conical flask, add 1: 1 inverse aqua regia 10 ml, covered with a small funnel, set the heating plate to boil for 10 minutes. Remove the washing funnel, quickly filtered in 250 liters conical flask, washed with water 3-5 times, control the total volume of about 50 ml. Add 5 ml of 10% tartaric acid solution, 1 ml of 0.01% copper acetate solution, adjust pH> 8 with 1: 1 aqueous ammonia, change color