CAJ | 학술논문

建立了蒸馏容量法测定铅基合金中的砷的分析方法。用稀硝酸溶样，以硫酸铅沉淀形式分离基体铅。砷在30％的盐酸溶液中是A s （Ⅲ）离子状态于108℃时以三氯化砷形式挥发，收集蒸馏出来的三氯化砷并中和至中性，以20％的碳酸氢钠溶液作缓冲液，用碘标准溶液滴定。使用本方法对铅基合金标准样品中的砷的测定，其相对标准偏差为2．50％～3．50％，结果准确可靠，方法切实可行。
건립료증류용량법측정연기합금중적신적분석방법。용희초산용양，이류산연침정형식분리기체연。신재30％적염산용액중시A s （Ⅲ）리자상태우108℃시이삼록화신형식휘발，수집증류출래적삼록화신병중화지중성，이20％적탄산경납용액작완충액，용전표준용액적정。사용본방법대연기합금표준양품중적신적측정，기상대표준편차위2．50％～3．50％，결과준학가고，방법절실가행。
Set up the distillation capacity analysis method for determination of arsenic in the lead alloy . With dilute nitric acid to dissolve sample , in the form of lead sulfate precipitation separation matrix of lead . Ar-senic in 30% hydrochloric acid solution is the As ( Ⅲ) ion condition at 108 ℃ in the form of arsenic trichlo-ride volatile , collect distillation of arsenic trichloride and neutralization to neutral , with 20% sodium bicar-bonate solution As a buffer , with iodine standard solution titration . Using this method for the determina-tion of arsenic in lead -based alloy standard samples , the relative standard deviation is 2 .50% ~3 .50% , the results accurate and reliable , the method is feasible .