| 两性表面活性剂增敏催化动力学法测定锰的研究 |
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| 引用本文： | 谢增鸿,傅彦斌,陈国南.两性表面活性剂增敏催化动力学法测定锰的研究[J].光谱学与光谱分析,2002,22(4):623-626. |
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| 作者姓名： | 谢增鸿 傅彦斌 陈国南 |
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| 作者单位： | 福州大学化学系,福建,福州,350002 |
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| 基金项目： | 教育部《高等学校骨干教师资助计划》项目，福建省自然科学基金资助研究课题 (D9910 0 0 9)，福建省科技三项资助研究课题 (K990 3 7) |
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| 摘 要： | 本文报道了以氨三乙酸为活化剂 ,以N 十二烷基二甲基氨基乙酸 (DDMAA)为增敏剂 ,高碘酸钾氧化硫堇催化光度法测定痕量锰的新方法。本法在两性表面活性剂DDMAA存在下 ,灵敏度提高了 7 1倍 ,线性范围为 0～ 6 0ng·( 2 5mL) -1 ,相对标准偏差为 2 % (n =11) ,方法的检出限为 7 5× 10 -1 1 g·mL-1 。该法用于测定铝合金、自来水中的锰 ,结果令人满意
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| 关 键 词： | 两性表面活性剂 增敏 催化动力学法 测定 催化光度法 N－十二烷基二甲铵基乙酸 硫堇 锰 铝合金 自来水 |
| 文章编号： | 1000-0593(2002)04-0623-04 |
| 修稿时间： | 2001年6月22日 |
The Study of Amphoteric Surfacant Sensitizing Catalytic Spectrophotometric Determination of Mn(Ⅱ) |
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| Zeng-hong Xie,Yan-bin Fu,Guo-nan Chen.The Study of Amphoteric Surfacant Sensitizing Catalytic Spectrophotometric Determination of Mn(Ⅱ)[J].Spectroscopy and Spectral Analysis,2002,22(4):623-626. |
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| Authors: | Zeng-hong Xie Yan-bin Fu Guo-nan Chen |
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| Institution: | Department of Chemistry, Fuzhou University, Fuzhou 350002, China. |
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| Abstract: | A new catalytic spectrophotometric method for the determination of trace amount of Mn(II) has been developed. The method is based on the oxidation of thionine by potassium periodate in the presence of nitrilo triaceticacid as an activator and amphoteric surfactant dodecyl dimethylamino acetic acid(DDMAA) as enhancing agent. Dodecye dimethylamino acetic acid (DDMAA) micelles accelerate the reaction and hence increase the sensitivity and selectivity of the determination of Mn(II) compared to reactions taking place in an aqueous medium. The mechanism of related reaction has been discussed. The sensitivity is increased by 7.1 times in the presence of the DDMAA than that in the absence of the DDMAA. The linear ranges of determination are 0-60 ng.(25 mL)-1, the relative standard deviation is 2% (n = 11). The method can be used for the determination of Mn(II) in aluminium alloy and water samples. |
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| Keywords: | Catalytic spectrophotometry Dodecye dimethylamino acetic acid Thionie Manganese |
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