摘要:
在优化的条件下,用电喷雾电离质谱(ESI-MS)检测了多种纺织品中由偶氮染料还原获得的芳香胺.当毛细管温度为100℃、鞘气流速为25单位、进样流速为10 μL/min、电压为5 kV时,信号的总离子流强度高且较稳定.实验分析了19种致癌芳香胺标准溶液的二级质谱,获得了相应物质的特征碎片离子;在此基础上,建立了基于ESI-MS对毛巾、棉布等样品中芳香胺进行快速定性分析的方法,具有灵敏度高、特异性好、检测速度快等优点.
Abstract:
Under the optimized experiment conditions, aromatic amines reduced from various azo dyes in textiles were directly detected by electrospray ionization mass spectrometry (ESI-MS). Under the following experimental conditions: temperature of the heating capillary at 100℃, the flow rate of sheath gas at 25 arb units, the sample flow rate at 10 μL/min and 5 kV ESI voltage, the total ion current of signal was stable and of the highest intensity. Thus, 19 types of carcinogenic aromatic amines were detected and identified using ESI-MS/MS and characteristic ions of all the precursor ions tested were obtained. Based on ESI-MS/MS analytical technique, a new method for rapid detection of aromatic amines in textiles was established to inspect various practical samples such as cotton clothes, silk textiles and etc. with advantages of improved sensitivity, good specificity, high sample throughput and low detection limits at sub ng/L level.
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