摘要
研究了惰气熔融-红外吸收法测定药芯焊丝药粉中高含量氧的可行性,确立了氧氮氢分析仪的最佳工作条件。结果表明:在分析功率为5.5kW,称样量为20~60mg,加入0.3~0.5g纯铁做助熔剂的条件下,以重铬酸钾校准仪器,选用手动投样-间歇加热模式,可以得到满意的分析结果。方法应用于药芯焊丝药粉实际样品中氧的测定,结果与差减法测得值基本一致,相对标准偏差(n=5~7)小于5.5%,加标回收率为90%~103%。
The feasibility of inert gas fusion-infrared absorption determination of high content oxygen in flux-cored wire(FCW)powder was investigated and the optimal working conditions of oxygen/nitrogen/hydrogen analyzer were established.It was found that,satisfactory results could be obtained with20-60 mg of sample,0.3-0.5g of pure iron as flux and a potassium dichromate-calibrated analyzer operating at analysis powder of 5.5kW under manual sample loading-intermittent heating mode.When the method was applied to the determination of oxygen in flux-cored powders actual samples,the results were accordant with those obtained by subtraction method with the relative standard deviation(RSD,n=5-7)less than 5.5%and the standard addition recovery of 90%-103%.
出处
《冶金分析》
CAS
CSCD
北大核心
2014年第9期53-57,共5页
Metallurgical Analysis
关键词
惰气熔融
红外吸收法
手动投样
间歇加热
药芯焊丝药粉
高含量氧
重铬酸钾
烧结焊剂
inert gas fusion
infrared absorption
manual sample loading
intermittent heating
fluxcored powder
high content oxygen
potassium dichromate
agglomerated flux
