高效液相色谱-线性离子阱/静电场轨道阱质谱快速筛查确证生态纺织品中22种致敏性分散染料

建立了基于高效液相色谱-线性离子阱/静电场轨道阱高分辨质谱(HPLC-LTQ/Orbitrap MS)快速筛查确证生态纺织品中22种禁用分散染料的分析方法。样品在95 ℃水浴条件下经吡啶/水(1:1, v/v)振荡提取后,以CAPCELL PAK C₁₈色谱柱分离,以乙腈和5 mmol/L乙酸铵(含体积分数为0.01%的甲酸)作为色谱流动相进行梯度洗脱,采用正、负电喷雾(ESI)离子化模式,利用一级母离子的精确质量数和保留时间对22种分散染料进行快速筛查,利用碰撞诱导解离(CID)下得到的二级碎片离子进行确证。22种分散染料在各自浓度范围内线性关系良好(r²> 0.99),方法的定量限(LOQ)为0.125~2.5 mg/kg。除分散黄49外,绝大多数染料在涤纶布、棉涤混纺布两种纺织品基质中的加标回收率在65%~120%之间,相对标准偏差小于15%。应用本方法对涉及多种纤维类型的40余件纺织品样品进行了筛查,其中一个样品检出分散橙37/76。该方法简便、快速,其选择性高,抗干扰性能好,结果准确可靠,可用于纺织品中分散染料的检测。

Rapid screening and identification of 22 allergenic disperse dyes in ecological textiles by high performance liquid chromatography-linear ion trap/orbitrap mass spectrometry

A rapid screening method based on high performance liquid chromatography-linear ion trap/orbitrap high-resolution mass spectrometry (HPLC-LTQ/Orbitrap MS) for 22 disperse dyes in ecological textiles has been established. The target compounds were extracted by pyridine/water (1:1, v/v) by shaking extraction in 90 ℃ water bath. The extracts were then separated by a CAPCELL PAK C₁₈ column (100 mm×2.0 mm, 5 μm) using gradient elution with acetonitrile-5 mmol/L ammonium acetate containing 0.01% (v/v) formic acid as mobile phases, and finally analyzed by HPLC-LTQ/Orbitrap in positive and negative ESI modes. The retention time and accurate mass of parent ion were used for fast screening of 22 disperse dyes, while the confirmatory analysis was obtained by fragments generated by collision-induced dissociation (CID) MS/MS. Target analysis exhibited high mass accuracy (< 5×10^-6). Each target showed a good linearity in its own concentration range and the correlation coefficient was higher than 0.99. The LOQs were 0.125-2.5 mg/kg. Except for Disperse Yellow 49, the average recoveries of most disperse dyes at three spiked levels were 65%-120%, and the relative standard deviations (n=6) were less than 15%. The method was applied for screening 40 different kinds of textiles, and Disperse Orange 37/76 was detected in one of them. With high selectivity and strong anti-jamming ability, this method is simple, rapid, accurate, and it can be used for the inspection of disperse dyes in textiles.