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本文叙述了用硫酸——硝酸及五氧化二钒为催化剂的消化谷物样品的方法。样品消化后再用原子吸收光度法测定含汞量。取样品5克和五氧化二钒0.25克及玻璃珠三颗置于作者特制的200毫升两颈反应瓶内。一颈接滴液漏斗,一颈接冷凝器,在颈口与冷凝器之间,尚有一指形冷凝管,内充以千冰。经滴液漏斗加硝酸6毫升于反应瓶内,在电热板上缓缓加热,当反应剧烈时关闭电源,小心加入2毫升
This paper describes a method for digestion of cereal samples using sulfuric acid-nitric acid and vanadium pentoxide as catalysts. After the sample is digested, the content of mercury is determined by atomic absorption spectrophotometry. Take 5 grams of sample and 0.25 grams of vanadium pentoxide and three glass beads placed in a special 200 ml two-necked reaction flask. A neck connected to the dropping funnel, a neck connected to the condenser, between the neck and condenser, there is a finger condenser, filled with thousands of ice. 6 ml of nitric acid was added to the reaction flask through a dropping funnel and slowly heated on a hot plate. When the reaction was violent, the power was turned off. Carefully add 2 ml