The Removal of Interference from Microwave Digestion Solution of Industrial Wastewater on the Determination of Arsenic

Abstract:

In existing literature ,there is no unified time for the evaporating excessive acid to microwave digestion solution of different samples. a new method was developed .The interference from nitrite ion and volatile nitrogen oxides which were generated during digestion were quickly removed by the adding urea and heating with boiling water. The interference from nitrate was studied. Optimized conditions of determination of arsenic with hydride generation atomic absorption spectrometry. The detection limit was 0.3μg·L^-1 and minimum quantitative detection limit was 1.0μg·L^-1, the relative standard deviation of standard addition method in sample was 1.1% and recovery from 98 % to 102%.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 625-628
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.625
• Online since: July 2014
• Authors: Ming Ming Yang*, Hong Wei An
• Keywords: Arsenic, Industrial Waste Water, Interference, Microwave Digestion

References

[1] Chunhua WU, Yuanqi LV, AFS determination of arsenic and mercury in biological samples-digestion of sample by microwave heating[J]. Physical Testing and Chemical Analysis(Part B: Chemical Analysis). 2006, 42(1): 41-45.

[2] Qi DAI, Ying ZHOU. Determination of lead, arsenic and mercury in cosmetics by ICP-AES with acid lixiviation [J]. Chinese Journal of Analysis Laboratory, 2007, 26(11): 82-84.

[3] Jordi. Sardans, Fernando Montes. Determination of As, Cd, Cu, Hg and Pb in biological samples by modern electro thermal atomic absorption spectrometry[J]. Spectrographic Acta Part B, 2010, 65: 97-112.

DOI: 10.1016/j.sab.2009.11.009

[4] Xuan MA, The preparation method of determination on heavy metals[J]. Toothpaste Industry, 2006, 3: 59-60.

[5] E'rico Marlon de Moraes Flores. Minimization of volatile nitrogen oxides interference in the determination of arsenic by hydride generation atomic absorption spectrometry [J]. Spectro chimica Acta Part B, 2001, 56, 1883-1891.

DOI: 10.1016/s0584-8547(01)00335-4

[6] R. M. Brown, G. S. Wllson. Interference by Volatile Nitrogen Oxides and Transition-Metal Catalysis in the Pre concentration of Arsenic and Selenium as Hydrides [J]. Anal. Chem, 1981, 53, 1560-1566.

DOI: 10.1021/ac00234a005

[7] Xueqing, Xuefeng YIN. Rapid Removal of Interference from Nitric and Nitrous Acid on the Determination of Arsenic with Hydride Generation Atomic Fluorescence Spectrometry [J]. Chinese Journal o f Analytical Chemistry, 2009, 37(2): 288-290.