Determination of Inorganic Anions and Melamine in Fertilizers by Ion Chromatography

Chen Liang, Miaomiao Zhang, Xiaojiao Wang, Yunli Yan and Pengfei Fu

Asian Agricultural Research, 2021, vol. 13, issue 08

Abstract: A chromatographic analysis method for determining inorganic anions and melamine in fertilizers was established using ion chromatography (IC). The fertilizer samples were extracted by ultrasonic method with 7 g/L trichloroacetic acid solution and centrifuged. The supernatant is purified by a solid phase extraction column. Then, the anions in the solution were purified using SH-AP-1 (250 mm×4.0 mm) as a separation column, and measured by a suppressed conductivity detector; the melamine in the solution was separated using SH-CC-4 (200 mm×4.0 mm) as a separation column and detected by a UV detector. The results show that the mass concentration of anions had a linear relationship with its peak area within a certain range, the linear correlation coefficient r of the standard curve was greater than 0.999, the recovery rate of spiked samples was 93.4%-104.4%, and the relative standard deviation (RSD) of the measured value (n = 6) was less than 4%. Thus, this method is widely suitable for detection of anions and cations in a variety of fertilizer samples.

Keywords: Agribusiness (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:ags:asagre:317690

DOI: 10.22004/ag.econ.317690

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