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本文介绍了一个测定生物样品中含汞量的方法。准确称取0.7～2.0克样品于250毫升开口容量瓶中,加40毫克的五氧化二钒和8毫升浓硝酸。在预热140℃的电热板上加热5分钟,稍冷却再加15毫升的浓硫酸,在电热板上加热到140℃15分钟。取下烧瓶,放冷后,用10毫升1N硫酸洗净瓶壁,再加热5分钟。不盖塞子放置过夜或在100毫升量筒内稀释至80毫升,充分混匀,转移其中的40毫升于100毫升容量瓶中,使其温度达到室温。加5毫升硫酸亚锡还原剂(溶71克硫酸
This article describes a method for determining the amount of mercury in a biological sample. Weigh accurately 0.7 to 2.0 grams of sample in a 250 ml open volumetric flask, add 40 mg of vanadium pentoxide and 8 ml of concentrated nitric acid. Preheat the hot plate at 140 ° C for 5 minutes, slightly cool and add 15 ml of concentrated sulfuric acid and heat to 140 ° C on a hot plate for 15 minutes. Remove the flask, let cool, wash the wall with 10 ml of 1 N sulfuric acid and heat for another 5 minutes. Place the stopper overnight or in a 100 ml graduated cylinder to 80 ml, mix well and transfer 40 ml of it in a 100 ml volumetric flask to bring it to room temperature. Add 5 ml stannous sulfate reducing agent (dissolve 71 grams of sulfuric acid