| 双波长分光光度法测定铝合金中锌 |
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| 引用本文： | 毛陆原 郭正让. 双波长分光光度法测定铝合金中锌[J]. 冶金分析, 1993, 15(5): 1-1 |
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| 作者姓名： | 毛陆原 郭正让 |
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| 作者单位： | 郑州大学化学系 郑州450052(毛陆原，郭正让)，郑州大学化学系 郑州450052(陈亚华) |
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| 摘 要： | 应用锌试剂(2-羧基2’-羟基- 5’-磺苯甲(月替)作显色剂,以双波长分光光度法测定铝合金中的微量锌.在pH9.28的条件下,选择试剂和配合物的最大吸收峰波长(490nm、620nm)分别为参比波长和测定波长,读取吸光度差对锌浓度作图,0～2μg/ml范围内呈良好线性关系.由直线斜率计算摩尔吸光系数为4.4×10~4,是单波长光度法的2倍.样品分析结果与标准值一致,相对标准偏差<5%.
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| 关 键 词： | 双波长分光光度法 锌 锌试剂 铝合金 |
Dual-Wavelength Spectophotomctric Determination of Zinc in Aluminium Alloy |
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| Mao Luyuan,Guo Zhengrangj Chen Yahua. Dual-Wavelength Spectophotomctric Determination of Zinc in Aluminium Alloy[J]. Metallurgical Analysis, 1993, 15(5): 1-1 |
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| Authors: | Mao Luyuan Guo Zhengrangj Chen Yahua |
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| Abstract: | Zinc in cast aluminium alloy has been determined by dual-wavelength spectrophotometry with Zincon (2-carboxy-2'-2'-hydroxy-5'-sulformazylbenzene ). The absorbance difference at the wavelength of the zinc chelate ( 620nm ) and that of Zincon ( 490nm ) is measured. Beer's law is obeyed up to 2 ug/ml for zinc. The apparent molar absorptivity is 4.4x104. The sensitivity is two times greater than that for conventional coiorimetry.The relative standard deviation of results is less than 5%. |
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| Keywords: | Dual-wavelength spectrophotometry. Zinc Zincon Aluminium alloy |
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