2.5次微分极谱法测定生物样品中痕量铬  

DETERMINATION OF TRACE CHROMIUM IN BIOLOGICAL SAMPLES BY 2.5TH ORDER DIFFERENTIAL POLAROGRAPHIC ANALYSIS

作　　者：张晓丽[1] 王丽增[1] 林光荣 陈荣礼[1] 

机构地区：[1]山东大学化学系,济南250100

出　　处：《营养学报》1993年第3期323-326,共4页Acta Nutrimenta Sinica

摘　　要：在氯化铵-乙二胺-EDTA底液中(pH=9.00),铬(Ⅵ)与铜铁试剂产生一灵敏的络合吸附峰,Ep=-1.45V。利用此峰可测定低至9.6×10^(-10)mol/L的铬,方法用于茶叶、粮食、自来水、指甲等中铬的测定,方法回收率在94～105％之间。In NH4Cl-NH2CH2NH2-EDTA (pH = 9.0) supporting electrolyte containing cupferron, chromium( Ⅵ) complex with cupferron has a rather sensitive adsorptive wave. The reduction peak potential is -1.45V. The determination limit is 9,6×10-10mol/L. This method has been successfully used to samples of tea, grain and water.

关 键 词：铬 极谱法测定 生物样品 

分 类 号：R155.5[医药卫生—营养与食品卫生学]