Determination of n-hexane in Soybean meal by Headspace Gas Chromatography

doi:10.14088/j.cnki.issn0439-8114.2019.01.024

Abstract

Abstract: In order to establish an accurate method for the determination of n-hexane solvent residues in soybean meal, the principle of gas-solid equilibrium by using headspace gas chromatography, the headspace condition was optimized in the process. The results showed that the detection limit of this method was 0.5 mg/kg and the quantitative limit was 5 mg/kg,which was lower than the limit of GB 5009.262-2016. The linear relationship was good in the range of 10~500 mg/kg,R² was 0.999 1;The precision of this method was good, the RSD was less than 2%; The accuracy was higher, the recovery rate was between 88.3%-102.3%,and the RSD was less than 2%. This method can meet the needs of different concentration samples and can provide reliable basis for the determination of solvent residues in soybean meal.

Key words: bean pulp, headspace, n-hexane, gas solid equilibrium, methodology

CLC Number:

O657.7⁺1

ZHANG Juan, XIE Yi-min, LI Kai, JIA Xin, YANG Hui-lin. Determination of n-hexane in Soybean meal by Headspace Gas Chromatography[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(1): 100-102.

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