食品添加剂的梯度淋洗分离和抑制电导检测  

Determination of food additive with gradient eluent separation and suppressor conductance detector.

作　　者：张培敏[1] 朱岩[1] 徐育[1] 

机构地区：[1]浙江大学化学系,浙江杭州310028

出　　处：《浙江大学学报（理学版）》2003年第2期183-187,共5页Journal of Zhejiang University（Science Edition）

基　　金：浙江省自然科学基金资助项目 (2 0 10 89) ;浙江省分析测试基金资助项目 (0 2 164 )

摘　　要：采用新型抑制器 ,对乙酸根、甲酸根、丙酮酸根、氯离子、山梨酸根、苯甲酸根、硝酸根、磷酸根、酒石酸根、硫酸根、草酸根、柠檬酸根在流速为 1.5 m l/ min,碳酸钠 /碳酸氢钠梯度淋洗液分离 ,抑制电导检测得到理想的分离效果和较高的灵敏度 .乙酸根、甲酸根、丙酮酸根、氯离子、山梨酸根、苯甲酸根、硝酸根、磷酸根、酒石酸根、硫酸根、草酸根、柠檬酸根检测限分别为 0 .4 5 μg/ m l,0 .2 7μg/ ml,0 .60 μg/ ml,0 .4 2 μg/ ml,0 .72 μg/ ml,2 .16μg/ ml,3 .66μg/ ml,0 .3 3 μg/ m l,1.4 4 μg/ ml,1.5 3 μg/ ml,1.2 3 μg/ ml,0 .4 5 μg/ m l(S/ N=3 ) ,具有良好的线性关系和重现性 .对饮料样品进行测定 。Food additive can be separated by ion chromatography in which the eluent is a Na 2CO 3 and NaHCO 3 gradient solution at a flow rate of 1.5 ml/min, The detection limits( S/N =3) of food additives such as acetate, formate, pyruvate, Cl -, sorbate, benzoate, nitrate, phosphate, tartarate, sulfate, oxalate, and citrate are 0.45 μg/ml,0.27 μg/ml, 0.60 μg/ml ,0.42 μg/ml,0.72 μg/ml,2.16 μg/ml,3.66 μg/ml,0.33 μg/ml,1.44 μg/ml,1.53 μg/ml,1.23 μg/ml,0.45 μg/ml, respectively. Experimental results show that the linear relationship and repeatability are good. The method was used to determine food additive in drink, the results were satisfactory.

关 键 词：食品添加剂 抑制电导检测 离子色谱分离 梯度淋洗 分离效果 抑制器 

分 类 号：TS202.3[轻工技术与工程—食品科学]