| 光谱学与光谱分析 |
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| Rapid Determination of Dodecylmorpholine in Aqueous Solutions with UV-Vis Spectrophotometry |
| QUAN Chao-ming1, 2, 3, HU Yao-qiang1, 2, 3, LIU Hai-ning1, 2, LI Ming-zhen1, 2, YE Xiu-shen1, 2*, WU Zhi-jian1, 2* |
1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China
2. Key Laboratory of Salt Lake Resources Chemsitry of Qinghai Province, Xining 810008, China
3. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract A rapid UV-Vis spectrophotometric method was proposed to determine the concentration of DMP in aqueous solutions. The linear concentration range of DMP solution at the range of 250～400 nm is 0.5～70 mmol·L-1. At 275 nm, the linear fitting equation is A=0.030 7c+0.133 0 with a correlation of 0.980 9. The detection limitation is 9.46×10-5 mmol·L-1, the RSD (n=6) of the method were at the range of 0.100%～0.612%. The recovery ratio for salt solutions sample is 95%～104%. Temperature, pH, and coexisting K+, Na+, Mg2+, Cl-, Br-, I-, SO2-4 ions do not affect the detection. The coexisting CO2-3 and HCO-3 ions can be eliminated with acidification. The results showed that the proposed method is simple in pretreatment process and has high accuracy and precision. It is a quick measurement method of DMP concentration in water solution, and can be used to measure DMP concentration in reverse flotation tail liquid and reverse flotation material pulp.
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Received: 2016-01-27
Accepted: 2016-04-22
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Corresponding Authors:
YE Xiu-shen, WU Zhi-jian
E-mail: yexs@isl.ac.cn
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