电感耦合等离子体原子发射光谱仪故障与处理

电感耦合等离子体原子发射光谱仪具有稳定性高、检出限低、线性动态范围宽、分析速度快等特点,在金属材料、水质及环境、矿产资源等众多领域实验室的检测工作中被广泛应用。以MPX-VISTA电感耦合等离子体原子发射光谱仪为例,归纳了自激式等离子体发生器中火焰监测装置、振荡电路及附属电路、控制电路、气路系统等4个仪器方面的常见故障,通过系统地分析仪器等离子体发生器的结构及原理,找到了故障原因,并介绍了处理方法。对于从总体上把握等离子体发生器结构及快速处理等离子体发生器部分的故障提供了一种思路,降低等离子体发生器故障率,确保其能稳定有效地工作,为日常测试提供准确的分析数据。

Fault analysis and treatment of inductively coupledplasma atomic emission spectrometer

Inductively coupled plasma atomic emission spectrometer (ICP-AES) has the characteristics of high stability, low limit of detection, wide linear dynamic range and fast analysis speed, and it has been widely used in laboratory detection in many fields such as metal materials, water quality, environment and mineral resources. MPX-VISTA inductively coupled plasma emission spectrometer was selected as an example. The common faults of flame monitoring device, oscillation circuit and auxiliary circuit, control circuit and gas system in self-excited plasma generator were summarized. The causes of faults were found by systematically analyzing the structure and principle of instrumental plasma generator. Moreover, the treatment methods were introduced. It provided an idea to grasp the structure of plasma generator and deal with the faults quickly. It could reduce the fault rate of plasma generator, ensure its stable and effective operation, and provide accurate analysis data for routine tests.