Quantification of lead in telephone cord: use of x-ray photoelectron spectroscopy technique.
Quantification of lead in telephone cord: use of x-ray photoelectron spectroscopy technique.
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DOI：
10.1080/10473220301452
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发表时间：
2003-07-01
期刊：
影响因子：
--
通讯作者：
Ducatman, Alan M
中科院分区：
文献类型：
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作者：
Abdul-Razzaq, Wathiq N;Lee, Unchul;Ducatman, Alan M
历史上曾有人担心铅作为增塑剂存在于电话线中，造成健康危害，特别是对儿童，他们经常用嘴，咀嚼和吞咽非食物物品。口腔的酸性环境可以在非破坏性条件下将铅从表面浸出到唾液中。因此，区分覆盖电话线的聚氯乙烯（PVC）材料表面和内部的铅含量对于评估健康危害非常重要。使用X射线光电子能谱（XPS），我们测量了连接手机手持部分和底座的电话线的PVC外壳中的铅。在较旧（约12年）脐带的内外表面均检测到铅（内表面1.3原子%;外表面0.4原子%）。然而，当我们测试四种流行品牌的新电线（目前市场上有售）时，没有检测到铅。这项研究表明，XPS是一种有用的技术，可以区分铅含量之间的表面与内芯的塑化电话线。电话线和其他可能浸出铅的塑化材料应进行筛选，以确定安全性。
There have been historic concerns that lead has existed as a plasticizer in telephone lines, causing health hazards, especially for children, who frequently mouth, chew, and swallow non-food items. The acid environment of the mouth may leach lead from the surface into the saliva under non-destructive conditions. Thus, distinguishing the amount of lead in the surface versus the inside of the polyvinyl chloride (PVC) material covering the phone cord line is very important in assessing health hazards. Using X-ray Photoelectron Spectroscopy (XPS), we measured lead in the PVC covers of telephone cords that connect the handheld part of the phone to the base. Lead was detected in both the inner and outer surface of an older (approximately 12 years) cord (1.3 atomic percent in inner surface; 0.4 atomic percent in the outer surface). However, when we tested four popular brands of newer cords (currently available in the market), there was no detectable lead. This study demonstrates that XPS is a useful technique that can distinguish lead contents between surface versus inner core of plasticized telephone cords. Telephone cords and other plasticized materials that may leach lead should be screened to establish safety.