提高火焰原子吸收法的测量灵敏度  

Method to improve the measurement sensitivity of flame atomic absorption method

作　　者：王冰 Wang Bing(Quality and Inspection Center,PetroChina Daqing Petrochemical Company,Daqing 163714,China)

机构地区：[1]中国石油大庆石化公司质量检验中心,黑龙江大庆163714

出　　处：《炼油与化工》2025年第1期73-74,共2页Refining And Chemical Industry

摘　　要：研究无机纳米复合助剂种类和用量对聚乙烯流延膜热封层性能的影响,筛选出无机纳米复合助剂A作为聚乙烯流延膜热封层助剂,添加量为4000×10^(-6)以钛系催化剂制备出聚乙烯流延膜热封层专用料PE-LF274PC,其熔体质量流动速率为3.4~4.0g/(10min),密度0.927~0.930g/cm。制成流延薄膜雾度<6%,光泽度>86。加工应用实验表明,PE-LF274PC加工性能良好,适用于流延薄膜热封层的生产,满足用户要求。Sensitivity is an important index for evaluating instruments.Instruments with high sensitivity can measure variations in a small range more accurately and improve the measurementaccuracy.large error will occur by using low sensitivity instrument which can not meet the needs of high precision measurement.The limit of detectionis the minimum amount of an element required to produce an analytical signal capable of confirming the presence of an element in a sample.Through experiments,the limit of detection of flame atomic absorption instrument is reduced and the sensitivity of atomic absorption method is improved.

关 键 词：聚乙烯 流延膜 热封层 性能 

分 类 号：O657.31[理学—分析化学]