1.中车青岛四方机车车辆股份有限公司，山东青岛 266111； 2.华测检测认证集团股份有限公司，广东深圳 518101
Determination of soluble lead and cadmium in floor cloth of rail transit by inductively coupled plasma emission spectrometry
WANG Chunsheng, DU Lixin, XU Qiaohong, WANG Wei
1. CRRC Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., Qingdao 266111, China; 2. Centre Testing International Group Co., Ltd., Shenzhen 518101, China
摘要：建立电感耦合等离子体发射光谱法同时测定轨道交通地板布中可溶性铅、镉含量。以1.0 mol/L盐酸溶液为提取液浸泡样品24 h，最佳仪器工作条件：发射功率为1 200 W，雾化压力为0.22 MPa，观测高度为8 mm，各元素的分析谱线分别为铅220.35 nm，镉228.80 nm。结果表明，在最佳仪器工作条件下，可溶性铅与可溶性镉的质量浓度在0～0.5 mg/L范围内与信号强度均呈良好的线性关系，线性相关系数均为0.999 9，测定结果的相对标准偏差为4.11%～5.02%(n=7)，样品加标回收率为95.83%～99.17%。该方法简单、快速、准确，满足轨道交通地板布中可溶性铅、镉的测试要求。
Abstract：An inductively coupled plasma emission spectrometry method for simultaneous determination of soluble lead and cadmium in floor cloth of rail transit was established. 1. 0 mol/L hydrochloric acid solution was used as extraction solution for 24 h, the optimal operating conditions of the instrument were as the following: emission power was 1 200 W, atomization pressure was 0.22 MPa, and observation height was 8 mm, the analytical spectral lines of each element were 220.35 nm for lead and 228.80 nm for cadmium. The results showed that under the best working conditions of the instrument, the mass concentrations of soluble lead and soluble cadmium had a good linear relationship with the signal intensity in the range of 0-0.5 mg/L with the linear correlation coe fficients of 0.999 9, the relative standard deviation of the determination results was 4.11%-5.02%(n=7), the recoveries were 95.83%-99.17%. The method is simple, rapid and accurate, which can meet the test requirements of soluble lead and cadmium in floor cloth of rail transit.
Keywords：inductively coupled plasma emission spectrometry; soluble lead and cadmium; rail transit floor cloth
WANG Chunsheng，DU Lixin，XU Qiaohong，et al. Determination of soluble lead and cadmium in floor cloth of rail transit by inductivelycoupled plasma emission spectrometry[J]. Chemical Analysis and Meterage，2022，31(11)：59.