摘要
离子抑制色谱法对化学镀液中4种有机酸（氨基乙酸、乳酸、乙酸、柠檬酸）进行了形态分析.样品分析仅需6 min.样品用Hypersil ODS柱分离,流动相为25mmol/L磷酸盐缓冲溶液（pH=2.1）,紫外检测波长为210 nm.4种有机酸回归方程的相关系数均在0.9994以上,线性范围为0.05×10^-3～5×10^-3g/mL,检出限分别为6 mg/L（氨基乙酸）、20 mg/L（乳酸）、14 mg/L（乙酸）、9 mg/L（柠檬酸）,加标回收率在98.12%～102.60%之间（RSD在0.31%～0.98%之间）.根据分布系数公式,结合原溶液pH值,算出了各有机酸在溶液中不同存在形态的含量.
A method for the analysis of 4 organic acids （aminoacetic acid, lactic acid, acetic acid, citric acid） in electroless plating solutions was developed. The analysis could be finished within 6 rain. It is based on an ion suppression chromatographic separation under the conditions of isocratic elution with 25 mmol/L phosphate buffer solution （pH =2. 1 ） on a Hypersil ODS column, and UV detection at 210 nm. Linear calibrations were obtained within 0. 0.05×10^-3～5×10^-3 g/mL （r 〉 0. 999 4）. The limits of detection （mg/L） were 6 of aminoacetic acid, 20 for lactic acid, 14 for acetic acid and 9 for citric acid, respectively. The average recovery rate was（n =6） 98. 12% - 102. 60%, and the relative standard deviation（n =6） 0. 31% - 0. 98%. Through the formula for distribution coefficient, and with the pH value of the original solution, the contents of different forms of each organic acid were figured out.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第4期386-389,共4页
Chinese Journal of Applied Chemistry
基金
陕西省自然科学基金(2003B013)
陕西省教委基金(03JK075)资助项目
关键词
离子抑制色谱
化学镀液
有机酸
形态分析
ion suppression chromatography, electroless plating solution, organic acid, form analysis
