超高效液相色谱-串联质谱法快速测定纺织品和皮革中偶氮染料释放的致癌芳香胺

建立了超高效液相色谱-串联质谱法(UHPLC-MS/MS)快速测定纺织品和皮革中偶氮染料释放的致癌芳香胺物质的方法。样品前处理采用BS EN 14362-1:2012(纺织品)和ISO 17234-1:2010(皮革)方法,然后采用甲醇定容,再用Eclipse XDB-C18 RRHD色谱柱进行梯度洗脱分离,流动相为甲醇和水；采用电喷雾正离子模式,并用多反应监测模式(MRM)测定,外标法定量。方法优化了色谱分离条件、质谱碎裂电压、碰撞能量等,并考察了不同样品基质对回收率的影响。方法的定量限小于0.2 mg/kg;不同基质不同浓度的加标回收率在70%～120%之间(添加水平为500、1000、1500 μg/L, n=7);相对标准偏差小于15%。该方法的灵敏度远小于欧盟与我国国家标准要求的30 mg/kg,完全满足其定性定量的检测要求,并且检测速度快,选择性好。

Determination of carcinogenic aromatic amines derived from azo colorants in textiles and leather by ultra high performance liquid chromatography-tandem mass spectrometry

A rapid determination method was developed for the quantification and confirmation of 22 carcinogenic aromatic amines derived from azo colorants in textiles and leather by ultra high performance liquid chromatography-tandem electrospray ionization mass spectrometry (UHPLC-MS/MS). The methods of EN 14362-1:2012 (for textiles) and ISO 17234-1:2010 (for leather) were adopted for sample pretreatment, finally diluted with methanol. The target compounds were separated by an Eclipse XDB-C18 RRHD column and eluted with methanol and water in gradient, and then determined by positive electrospray ionization mass spectrometry under multiple reaction monitoring (MRM) mode. The external standard method was used for the quantitative analysis. The separation conditions, fragment voltages, collision energies, etc. were optimized. The limits of quantification (LOQ) were below 0.2 mg/kg for different compounds, matrix spike recoveries ranged from 70% to 120% at the spiked levels of 500, 1000 and 1500 μg/L, and the relative standard deviations (RSDs) were less than 15%. The proposed method is rapid, sensitive, accurate and selective.