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首页> 中文期刊> 《皮革与化工》 >微波辅助萃取-气质联用法同时测定皮革及其制品中5种限用酰胺类溶剂的残留量

微波辅助萃取-气质联用法同时测定皮革及其制品中5种限用酰胺类溶剂的残留量

         
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An effective method was established to determine the residual contents of five banned amides in leather and leather products simultaneously. Residual amides in leather and leather products were microwave-assisted extracted, using methanol as the extraction solvent. The extract was then purified by solid-phase extraction column, followed by the analysis of gas chromatography/mass spectrometry-selected ion monitoring (GC/MS-SIM) technique. The concentration of each analyte were calibrated by external standard method. The limit of detection (LOD) was 50, 10, 10, 25 and 5 g/kg for formamide, N-methylformamide, N-methylacetamide, N,N-dimethylformamide and dimethylace-tamide, respectively, under the condition of signal to noise (S/N) of 3. The spiked average recoveries changed from 86.13% to 95.67% under three different spiked levels while the relative standard deviation (RSD) varied from 1.35%to 4.28%. The proposed method was simple, rapid, accurate and sensitive, and applicable for the determination of residual amides in leather and leather products.%以甲醇为萃取溶剂，采用微波辅助萃取技术提取皮革及其制品中残留的限用酰胺类溶剂，提取液经固相萃取柱净化后进行气相色谱/质谱-选择离子监测法测定，外标法定量，从而建立了1个同时测定皮革及其制品中5种限用酰胺类溶剂的气质联用方法。在信噪比(S/N)=3的条件下，甲酰胺、N-甲基甲酰胺、N-甲基乙酰胺、N,N-二甲基甲酰胺、N,N-二甲基乙酰胺的检出限分别为50、10、10、25、5μg/kg。在3个不同加标水平下，平均加标回收率为86.13%~95.67%，相对标准偏差1.35%~4.28%(n=9)。该方法简单快捷，灵敏度高，检出限低，适用于皮革及其制品中限用酰胺类溶剂残留量的检测。

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