催化动力学分光光度法测定痕量甲醛
Catalytic Kinetic Photometric Determination of Trace Amounts of Formaldehyde
摘 要
在稀硫酸溶液中,甲醛对溴酸钾氧化罗丹明B的褪色反应有催化作用,研究了其动力学条件,建立了测定痕量甲醛的动力学分光光度法,该方法的线性范围为0.30~3.00 mg·L-1,检出限为0.15 mg·L-1,该法用于饮料中痕量甲醛的测定,标准加入回收率为95.5%~97.0%,RSD为1.8%~2.0%.
动力学分光光度法
甲醛
罗丹明B
Catalysis
Kinetic photometry
Formaldehyde
Rhodamine B
Abstract
In dilute H2SO4 medium,the color-fading oxidation of rhodamine B by KBrO3 was catalyzed by traces of formaldehyde.Linear relationship between the magnitude of decrease in absorbance measured at 540 nm and the concentration of HCHO was held in the range of 0.30-3.00 mg·L-1,with its detection limit of 0.15 mg·L-1.Kinetic conditions of the reaction were studied,and the proposed method was applied to the determination of trace amounts of HCHO in drinks.Recovery and precision of the method were tested,giving values of recovery and RSD′s (n=6) in the ranges of 95.5%-97.0% and 1.8%-2.0% respectively.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2006/12/11
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备注方夏(1961-),女,上海人,硕士,研究方向为催化光度法.
引用该论文: FANG Xia. Catalytic Kinetic Photometric Determination of Trace Amounts of Formaldehyde[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(11): 945～946
方夏. 催化动力学分光光度法测定痕量甲醛[J]. 理化检验－化学分册, 2007, 43(11): 945～946
被引情况:
【1】王志兵,高杨,刘洋, "微波辅助衍生-离子液体分散液液微萃取-高效液相色谱法测定发酵酒和饮料中甲醛",理化检验－化学分册 51, 502-505(2015)
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参考文献
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【2】Norkus F,Vaskelis A,Pauliukatie R.Polarographic determination of formaldehyde according to the anodic oxidation wave in alkaline solutions[J].Electroanalysis,1999,11(6):447．
【3】Maeda Y,Hu X C,Itou S,et al.Continuous determination of gaseous formaldehyde by a chemilum inescence method[J].Analyst,1994,119(10):2237．
【4】Deandrade J B,Deandrade M V,Pinheiro H L C,et al.Determination of formaldehyde and acetaldehyde in urine by HPLC[J].American laboratory,1999,31(10):22．
【5】叶存玲,王新明,周庆祥,等.吖啶红动力学荧光法测定痕量甲醛[J].分析试验室,2006,25(9):10．
【6】张克钧.催化动力学光度法测定痕量甲醛[J].光谱实验室,2005,22(5):1032-1034．
【7】田林芹,张爱梅,翟继英.动力学光度法测定痕量甲醛[J].分析试验室,2004,23(2):63-65．
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