Determination of inorganic anions and melamine in fertilizers by ion chromatography

doi:10.14088/j.cnki.issn0439-8114.2021.13.023

Abstract

Abstract: Develop a method for the determination of norganic anions and melaminein in fertilizer by ion chromatography（IC）. The fertilizer sample was ultrasonically extracted with 7 g/L trichloroacetic acid solution and centrifuged. The supernatant was purified by a solid phase extraction column. The anion in the solution was purified with SH-AP-1 （250 mm×4.0 mm） was a separation column, measured by a suppressed conductivity detector; SH-CC-4 （200 mm×4.0 mm） was used as a separation column for melamine in solution, detected by UV detector. Results show that the mass concentration of anions and cations had a linear relationship with their peak areas within a certain range, and all correlation coefficient（r） were more than 0.999,with the average recoveries range from 93.4% to 104.4%, and the precision（n=6） values below 4%. The method can be widely applied to the detection of anions and cations in a variety of fertilizer samples.

Key words: ion chromatography, fertilizer, anion, melamine

CLC Number:

O657.7⁺5

LIANG Chen, PENG Hao, ZHENG Xiu-jin, SHAO Guang-yin, ZHANG Jin-mei, ZHANG Miao-miao. Determination of inorganic anions and melamine in fertilizers by ion chromatography[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(13): 114-118.

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