半微分吸附溶出伏安法直接测定啤酒中痕量半胱氨酸  

Semi-differential adsorptive stripping voltammetry Direct determination of trace cysteine in beer

作　　者：张燕 吕革 何建国 

机构地区：[1]益阳市产商品质量监督检验所,湖南益阳413000

出　　处：《商品与质量（学术观察）》2013年第3期259-259,263,共2页The Merchandise and Quality

摘　　要：本文通过汞膜电极研究了在铜（Cu2＋）存在下，痕量半胱氨酸的半微分吸附伏安溶出行为。发现在Britton—Robinson缓冲溶液（PH3．0）中，半胱氨酸浓度在3．0X10—9～1．0×10-6mol／L范围内其溶出峰电流呈良好线性。富集10min，检测限为5．0×10-10mol／L，相对标准偏差为3．4％。本法无需前处理即可直接测定啤酒中痕量半胱氨酸，结果满意。In this paper, through the mercury film electrode was studied in the presence of copper （ Cu2＋ ）, behavior stripping Semidifferential adsorptive voltammetric cysteine. Found in Britton-Robinson buffer solution （ PH3.0 ）, cysteine at a concentration of 3× 10-9 -1× 10-6molVL within the scope of the stripping peak current showed a good linear. Enrichment of lOmin, the detection limit is 5 ×10-10molVL, the relative standard deviation of 3.4%. This method without pretreatment for direct determination of trace cysteine in beer, with satisfactory results.

关 键 词：半胱氨酸 伏安法 

分 类 号：X132[环境科学与工程—环境科学]