电感耦合等离子体发射光谱法(ICP-OES)检测电解二氧化锰痕量杂质时基体效应影响的研究
Influence of Matrix Effect on Determination of Trace Impurities in Electrolytic Manganese Dioxide by ICP-OES Spectroscopy
张修华 1苏广源 1李坚 1韦秋宋 1黄小波 1陈奇志1
作者信息
- 1. 广西汇元锰业有限责任公司,广西来宾 546130
- 折叠
摘要
电解二氧化锰有去极化作用,作为正极活性物质可有效提高放电容量,其质量的优劣对电池性能至关重要.随着电池生产销售在2006年实现无汞化,电池中不再含有能屏蔽重金属的腐蚀、减少自放电的汞齐,多数电池用电解二氧化锰要求铁、钴、镍、钒、铅、铜、钼、砷、锑含量低于一定限值,以防止这些有害金属杂质引起电池内部自放电、气涨、枝晶穿刺隔膜和漏液等不良反应.这些有害金属杂质常使用电感耦合等离子体发射光谱法(ICP-OES)同时进行分析,方法精确度高、分析速度快,但操作过程中受到基体效应干扰严重,尤其当杂质元素含量低至痕量范围内时,干扰信号可能会增强、削弱或覆盖待测元素信号,造成检测结果不准确.研究以SPECTRO ARCOS型号ICP-OES光谱仪为例,结合仪器特性和实际工作经验,对检测过程中出现的干扰特点进行分析,探讨基体效应消除或扣除的方法,以保障检测结果的准确性.
Abstract
Electrolytic manganese dioxide has a depolarizing effect and it can effectively increase the discharge capacity as a positive active material.Its quality is crucial to the performance of the battery.With the mercury-free production and sales of batteries in 2006,batteries are no longer of amalgam,which can shield heavy metals from corrosion and reduce self-discharge.Most batteries require electrolytic manganese dioxide with iron,cobalt,nickel,vanadium,lead,copper,molybdenum,arsenic,and antimony contents below certain limits to prevent these harmful metal impurities from causing adverse reactions such as internal self-discharge,gas expansion,dendritic penetration of the diaphragm and leakage of the battery.These harmful metal impurities are often analyzed simultaneously using inductively coupled plasma optical emission spectrometry(ICP-OES),which has high accuracy and fast analysis speed,but is seriously affected by matrix effects during operation,especially when the content of impurity elements is as low as the trace range.The interference signal may be enhanced,weakened,or cover the signal of the element to be detected,resulting in inaccurate detection results.This article takes the SPECTRO ARCOS model ICP-OES spectrometer as an example.It combines the instrument characteristics and practical work experience in analyzing the interference characteristics that occurs during the detection process.We have discussed the methods to eliminate or deduct the matrix effects to ensure the accuracy of the detection results.
关键词
电解二氧化锰/电感耦合等离子体发射光谱仪/基体效应/痕量Key words
Electrolytic manganese dioxide/Inductively coupled plasma emission spectrometer/Matrix effect/Trace amount引用本文复制引用
基金项目
广西壮族自治区重点研发计划(桂科AB23075211)
出版年
2024
NETL
NSTL
万方数据