双波长分光光度法测定双组分溶液中甲基橙和乙基橙

doi:10.3964/j.issn.1000-0593(2015)10-2825-05

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Abstract The high similarity of MO and EO made it difficult to measure concentration of MOD and EOD. In this paper, dual wavelength spectrophotometry was used to determinate the concentration of MOD and EOD, which was proved to be fast and accrate. 429.00 nm and 469.50 nm were selected as deternination wavelengthes at pH 12. And the influences of Na⁺ and Cl^- on determination of MOD and EOD were surveyed. The standard equations were A₄₂₉=0.003 47+0.061 c_M+0.056 46 c_E and A_469.50=0.002 8+0.074 37 c_M+0.083 94 c_E. Recovery of standard additions of MOD and EOD were larger than 95%, and relative standard deviation of standard equations were less than 2%. The addition of NaCl has little effect on recovery of standard additions and relative standard deviation of this method.

Key words： Dye Methyl orange Ethyl orange Dual wavelength spectrophotometry

Received: 2014-01-03 Accepted: 2014-05-06

ZTFLH:

O657.3

Corresponding Authors: YE Xiu-shen, WU Zhi-jian E-mail: yexs@isl.ac.cn

Cite this article:

HU Yao-qiang,GAO Can,LIU Hai-ning, et al. Determination of Methyl Orange and Ethyl Orange in Two-Component Solution by Dual Wavelength Spectrophotometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(10): 2825-2829.

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http://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2015)10-2825-05 OR http://www.gpxygpfx.com/EN/Y2015/V35/I10/2825