环境科学与技术
環境科學與技術
배경과학여기술
ENVIRONMENTAL SCIENCE & TECHNOLOGY
2001年
1期
44-45，49
,共3页
电位溶出法%微量铅%水%空气
電位溶齣法%微量鉛%水%空氣
전위용출법%미량연%수%공기
本文研究了在镀汞、银汞电极上铅的溶出行为，当pH为3.0～6 .0时，在乙酸钠——乙酸溶液中，铅的溶出电位为-0.445V，具有良好的溶出峰形。并且建 立了用微分电位溶出银汞电极分析空气和水中微量铅的方法，该法克服了玻碳电极法反复镀 汞的麻烦。本方法对四份水样进行回收率试验，其回收率均在90%以上，变异系数小于10%。 因此该法具有较好的精密度和准确性。
本文研究瞭在鍍汞、銀汞電極上鉛的溶齣行為，噹pH為3.0～6 .0時，在乙痠鈉——乙痠溶液中，鉛的溶齣電位為-0.445V，具有良好的溶齣峰形。併且建 立瞭用微分電位溶齣銀汞電極分析空氣和水中微量鉛的方法，該法剋服瞭玻碳電極法反複鍍 汞的痳煩。本方法對四份水樣進行迴收率試驗，其迴收率均在90%以上，變異繫數小于10%。 因此該法具有較好的精密度和準確性。
본문연구료재도홍、은홍전겁상연적용출행위，당pH위3.0～6 .0시，재을산납——을산용액중，연적용출전위위-0.445V，구유량호적용출봉형。병차건 립료용미분전위용출은홍전겁분석공기화수중미량연적방법，해법극복료파탄전겁법반복도 홍적마번。본방법대사빈수양진행회수솔시험，기회수솔균재90%이상，변이계수소우10%。 인차해법구유교호적정밀도화준학성。
The dissolution action,which is on the silve-mercury ele c trode while plating mercury,has been studied in this thesis.When pH is between 3 .0 and 6.0 in the CH3COONa-CH3COOH solution.The dissolution potential for th e lead is -0.445 voltage and a good shape of the dissolution peak curve can be f ormed.The method,which can analyse the trace lead in water or air with silver-m e rcury electrode by differential potential,has been established.The method gets r id of the trouble of plating mercury over and over again with glass-carbon elec tr ode.The experiment for the rate of recovery has been conducted in the four water samples.Its rate of recovery is all over 90% and the variation coefficient is l ess than 10%.So the method has the higher degree of preciseness and better accur acy.
