【摘要】 建立了再生聚对苯二甲酸乙二醇酯（rPET）样品中10种分散性染料的高效液相色谱-串联质谱（HPLC-MS/MS）检测方法。样品粉碎后经乙醇超声提取20 min，重复3次，选用Eclipse XDB-C₁₈色谱柱（150mm×2.1 mm,3.5μm），以甲醇-5 mmol/L乙酸铵作为流动相进行梯度洗脱，正离子模式下，采用多反应监测（MRM）模式进行测定。结果表明，10种分散性染料在各自质量浓度范围内呈良好的线性关系，相关系数（r²）不小于0.997 9，检出限（LOD）为0.1～0.5μg/L，定量下限（LOQ）为0.5～1.0μg/L。在低、中、高3个加标水平下的平均回收率为73.0%～107%，相对标准偏差（RSD）为1.7%～12%。该方法不存在明显的基质效应，具有灵敏度高、简单快捷、准确度高的特点，适用于再生聚对苯二甲酸乙二醇酯以及聚对苯二甲酸乙二醇酯（PET）样品中10种分散性染料的实验室检测。更多还原

【Abstract】 A high-performance liquid chromatography-tandem mass spectrometry（HPLC-MS/MS） method was established for the detection of ten disperse dyes in recycled polyethylene terephthalate（rPET） samples. After grinding the samples,extraction was performed three times by treating with ethanol under ultrasonic conditions for 20 minutes each time. An Eclipse XDB-C₁₈ column（150 mm×2. 1 mm,3. 5 μm） was used,and a gradient elution with methanol and 5 mmol/L ammonium acetate was employed as the mobile phase. Measurements were conducted in positive ion mode using multiple reaction monitoring（MRM）. The results showed that the ten disperse dyes exhibited a good linear relationship within their respective concentration ranges,with correlation coefficients（r²） not less than 0. 997 9. The limits of detection ranged from 0. 1 to 0. 5 μg/L,while the limits of quantification were between 0. 5 and 1. 0 μg/L. The average recoveries at low,medium,and high spiking levels ranged from 73. 0% to 107%,with relative standard deviations（RSDs） ranging from 1. 7% to 12%. Exhibiting no significant matrix effects,the method demonstrated high sensitivity,simplicity,and accuracy,making it suitable for laboratory detection of ten disperse dyes in rPET and PET samples.更多还原