氨三乙酸增敏催化光度法测定痕量锰
Sensitization Effect of NTA on the Catalytic Photometric Determination of Traces of Manganese(Ⅱ) Based on its Catalytic Action on the Oxidation of Bromophenol Blue by Potassium Periodate
摘 要
在活化剂氨三乙酸存在下,基于锰(Ⅱ)催化高碘酸钾氧化溴酚蓝的反应,拟定了测定痕量锰的催化光度法.此催化反应灵敏度高,选择性和重现性较好,线性范围为0.4~10 μg·L-1,检出限为8.5×10-8g·L-1,用于测定水样和茶叶中的锰,分析结果的相对标准偏差(n=6)分别为3.2%及1.1%，回收率依次为93%~109%和94%~108%.
催化光度法
催化氧化
锰
氨三乙酸
Catalytic photometry
Sensitization
Catalytic oxidation
Manganese(Ⅱ)
Nitrilotriacetic acid
Abstract
Photometric determination of trace amounts of manganese by its catalytic action on the color-fading oxidation of bromophenol blue with KIO4 was found sensitized by nitrilotriacetic acid (NTA). It was found that linear relationship between the decrease in intensity of absorbance measured at 590 nm (ΔA) and the concentration of Mn(Ⅱ) was held in the range from 0.4 to 10 μg·L-1 with a detection limit of 8.5×10-8g·L-1. RSD (n=6) and recovery found in the analysis of a tea sample were 1.1% and in a range of 94%-108%,and in the analysis of a well-water sample were 3.2% and in a range of 93%-109%.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2005/2/16
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备注吴秋华(1969-),女,河北省保定市人,讲师,从事光谱分析的研究工作.
引用该论文: WU Qiu-hua,YANG Li-hua,SONG Shuang-ju,TANG Ran-xiao,MA Jin-jun,BIAN Rui-huan,FENG Tao,WANG Chun. Sensitization Effect of NTA on the Catalytic Photometric Determination of Traces of Manganese(Ⅱ) Based on its Catalytic Action on the Oxidation of Bromophenol Blue by Potassium Periodate[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(1): 26～27
吴秋华,杨丽华,宋双居,唐然肖,马晶军,边瑞环,冯涛,王春. 氨三乙酸增敏催化光度法测定痕量锰[J]. 理化检验－化学分册, 2007, 43(1): 26～27
被引情况:
【1】耿卫东,张丹扬,杨亚玲, "表面活性剂增敏催化分光光度法测定痕量锰",理化检验－化学分册 47, 1313-1315(2011)
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参考文献
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【8】张志琪,李百禄.催化光度法测定痕量锰[J].分析化学,1988,16(4):334-336．
【2】刘长久,吴琦.催化动力学光度法测定痕量锰[J].分析化学,1995,23(8):907-910．
【3】郑肇生,吴和舟,林荔红.高碘酸钾氧化硫堇催化光度法测定痕量锰[J].分析化学,1991,19(12):1418-1420．
【4】Liu Renmin,Zhang Aimei,Liu Daojie. Determination of manganese in chinese tea leaves by a catalytic kinetic spectrophotometric method[J]. Analyst,1995,120:1195-1197．
【5】郑肇生,景卫国.增效试剂在动力学分析法中的应用研究2:锰(Ⅱ)-氨三乙酸-十二烷基硫酸钠-高碘酸钾-罗丹明B催化体系[J].化学学报,1996,54:1016-1022．
【6】杨志斌,黄岚,郜野牧.催化分光光度法测定食品中痕量锰[J].高等学校化学学报,1988,9(1):82-84．
【7】夏炳乐,李敏莉.二甲苯蓝FF指示催化光度法测定烟草中微量锰[J].分析试验室,1996,15(5):44-46．
【8】张志琪,李百禄.催化光度法测定痕量锰[J].分析化学,1988,16(4):334-336．
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