灰化消解-极谱法测定油料中五个重金属元素  

Polarographic Determination of 5 Heavy Metals in Oil with Ashing Digestion of Sample

作　　者：杨桂珍[1] 杨建男[1] 

机构地区：[1]湛江师范学院化学系,湛江524048

出　　处：《理化检验（化学分册）》2007年第4期267-269,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：建立了灰化消解-极谱法测定油样中镉、铅、铜、镍、钴等5种微量重金属元素的含量。油料样品通过灰化法消解后,用极谱法在乙酸-乙酸盐缓冲溶液和磺基水杨酸-磷酸-氨水体系中测定5种重金属元素的含量。5种微量重金属元素的检出限为1.3×10-4-9.8×10-4g.L-1,加标回收率为90%-106%,相对标准偏差为0.22%-3.16%。Five heavy metals, i. e., cadmium, lead, copper, nickel and cobalt, were determined by polarography. The oil sample was pretreated by burning, ashing and finally igniting.at 600℃. Cadmium（ Ⅱ）, lead （ Ⅱ ） and copper（ Ⅱ ） were .determined in an acetate buffer of pH 4. 6 and nickel （ Ⅱ ） as well as cobalt （ Ⅱ ） were determined in an ammoniacal solution of pH 9.5 containing phosphate and sulfosalicylate. Detection limits of the 5 elements were in range of 1.3×10^-4 -9. 8× 10^-4g· L^-1. Their values of RSD＇s were found in the range of 0. 22%-3.16 %, and values of recovery were in the range of 90 %- 106 %.

关 键 词：极谱法 灰化消解 重金属 油料 

分 类 号：O657.14[理学—分析化学]