摘要
用熔融制样法将样品在铂金坩埚中与四硼酸锂熔融,熔体倒入铂金专用模具中成型为玻璃态块样。用X射线荧光光谱法测定锰锌铁氧体样品中氧化铁、四氧化三锰及氧化锌含量。经试验求得熔融时样品和无水四硼酸锂熔剂的最佳质量比为1比17.5。采用基体参数法和理论α系数法对基体效应及谱线重叠的干扰予以校正。此法用于锰锌铁氧体材料分析,3种组分的日间和日内相对标准偏差（n=7）分别小于3.5%和4.0%;用于标准样品的分析,3种组分的测定值与标准值之间的绝对误差在-0.15%-0.02%之间。
The disc-shaped glassy melt of the ferrite sample for XRFS analysis was prepared by fusion with lithium tetraborate in a Pt-Au crucible and shaped in a Pt-Au mould.Major components of the ferrite,including ferric oxide,mangano-manganic oxide（Mn2O3·MnO） and zinc oxide were determined by XRFS with the disc-shaped sample.The optimum mass ratio of the flux（Li2B4O7） to sample was found to be 17.5 to 1.Interferences due to matrix effect and spectral overlapping were eliminated by correction with the methods of fundamental parameters and theoratical α-coefficients.The proposed method was used in the analysis of unknown samples and known samples for the contents of the 3 main components.Absolute deviations between the results found by this method and the certified values of the standard samples were found in the range from-0.15% to 0.02%.Values of intraday and interday RSD′s（n=7） found were less than 3.5% and 4.0% respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2010年第8期940-942,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
