胶体MnO_2溶液-甲醛-C_2O_4^(2-)化学发光的新体系  

New Chemiluminescence System of Colloidal MnO_2 Solution-Formaldehyde-C_2O_4^(2-)

作　　者：杨育民[1] 李红[1] 杨福洲[1] 

机构地区：[1]渭南职业技术学院,陕西省渭南市杜化路4号714000

出　　处：《光谱实验室》2012年第3期1666-1669,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：陕西省渭南市科技局科技攻关项目(2010GC1-3)

摘　　要：研究发现,在酸性溶液中,当甲醛存在时,胶体二氧化锰溶液和C2O24-能够发生化学发光反应,产生强的化学发光,据此采用流动注射分析技术,建立了一种利用胶体二氧化锰-甲醛-C2O24-化学发光体系测定草酸的化学发光分析方法。该方法的检出限为8×10-8g/mL C2O42-;相对标准偏差为0.97%(8.8×10-6g/mL C2O24-,n=11);线性范围是4.4×10-7—8.8×10-5g/mL C2O42-。该方法所用的仪器设备简单,操作快捷方便,选择性好,可用于菠菜等蔬菜中C2O24-含量的测定。The chemiluminecence reaction of colloidal manganese dioxide solution and C2O42- in acidic solution occurred in the presence of formaldehyde with strong chemiluminescence,basing on which a analysis method for determination of the chemiluminescence of oxalic acid by colloidal manganese dioxide-formaldehyde-C2O42- was established.The detection limit of the method was 8×10-8g/mL,and the relative standard deviation was 0.97%（C2O42- content of 8.8×10-6g/mL,n=11）,and the linear range was between 4.4×10-7g/mL and 8.8×10-5g/mL.The method has simple instrument,fast and convenient operation with good selectivity,and can be applied to determining the contents of C2O42- in spinach and other vegetables.

关 键 词：草酸根离子 化学发光 流动注射 胶体二氧化锰 甲醛 

分 类 号：O657.39[理学—分析化学]