Determination of total amount of benzoyl peroxide and benzoic acid in wheat flour by capillary gas chromatography

被引：0

作者：

Ren, Q ^{[1
]}

Huang, JL

机构：

[1] Chinese Acad Sci, Fujian Inst Struct Matter, Fuzhou 350002, Peoples R China

[2] Inst Grain & Oil Qual Supervis & Test Fujian, Fuzhou 350002, Peoples R China

来源：

CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2004年 / 32卷 / 02期

关键词：

capillary gas chromatography; wheat flour; benzoyl peroxide; benzoic acid;

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An improved method for the determination of total amount of benzoyl peroxide (BPO) and benzoic acid (BA) in wheat flour is reported. The two components were efficiently extracted from wheat flour with mixed solvent of acidic ethyl ether and petroleum ether( 60 similar to 90degreesC), and then analyzed by gas chromatography on a silica capillary column DB-WAX (60 in x 0.32 mm id. 0.25 mum) and with a flame ionization detector. External standard method was used for the quantitative analysis. The RSD of the method was 4.8% similar to 9.1%. The linear range of the method was 0.005 similar to 0.1 g/L (r = 0.996). Minimum detectable limit at a signal-to-noise of 2:1 was 2.0 mg/L. The recovery was in the range of 90.0% similar to 96.5%. The method has been used to determine total amount of BPO and BA in wheat flour with satisfactory results.

引用

页码：221 / 224

页数：4