摘要
针对激光诱导击穿光谱技术用于水体重金属连续、自动、快速、高灵敏监测中的需求,以石墨为富集基体,采用电磁感应加热技术实现了样品的快速加热与富集,并研究了基于降温斜率的烘干判断方法。实验中以设定140℃判定定时2 s为例,测得从室温上升到140℃用时30 s,温度的误差范围为-5^+3℃,基于降温斜率准确判断了富集完成状态。研究结果表明,采用电磁感应加热技术结合基于降温斜率的富集完成判断方法可以有效实现被测样品的快速加热和准确烘干判断。
For continuous automatic, fast and high sensitive analysis of heavy metal in water by laser-induced breakdown spectroscopy technique （LIBS）, the sample solution was enriched onto graphite sheet and heated by electromagnetic induction heating technology. Finally, the rapid heating and enrichment of the sample was achieved. In addition, the dry judgment method based on the cooling slope were investigated. In the example of a set temperature 140 ℃ and timing 2 s, the rise time was measured as 30 s from room temperature to 140℃ and the temperature error range was -5 ～＋3 ℃. The completion status of enrichment was also accurately determined on the basis of the cooling slope. The results show that the rapid heating and accurate drying judgment can be effectively achieved by the use of electromagnetic induction heating technology combined with the judgment method of enrichment completion based on the cooling slope.
出处
《大气与环境光学学报》
CAS
CSCD
2015年第1期69-75,共7页
Journal of Atmospheric and Environmental Optics
基金
国家自然科学基金(60908018)
国家"863"计划资助项目(2013AA065502)
安徽省杰出青年科学基金(1108085J19)
中国科学院仪器设备功能开发技术创新项目(yg2012071)资助
关键词
激光诱导击穿光谱技术
石墨富集
电磁感应加热
降温斜率
烘干判断
laser-induced breakdown spectroscopy
graphite enrichment
electromagnetic induction heating
cooling slope
drying judgment
