卷烟焦油测试嵌套析因设计分析

摘要

为了研究卷烟焦油测试过程中的各变异源的差异,采用完全嵌套方差分析和嵌套析因设计分析对各变期源进行分析.结果表明:①具有明确原因的变异源中,总粒相物的变异性最大,为42.0％；总粒相物和滤片含水量(W&W)的变异性较大,为30.6％；空白水分变异性为25.3％；烟碱和气相色谱仪引入的变异性仅占2.3％；在进行减小测量变异性改进时应从前3个变异源考虑；②由日期和时间引起的变异性为42.9％,在卷烟焦油比对测试时应参考日期和时间方向上的变异进行设计.%To study the differences of various variation sources in the determination of tar content in cigarette smoke, nested variance analysis and nested factorial design analysis were applied. The results showed that: 1) Of all the definite variation sources, total paniculate matter had the greatest variation of 42.0%, followed by moisture content in total paniculate matter and Cambridge filter (W&W), and that in blank filter, their variation was 30.6% and 25.3%, respectively; the variation introduced by nicotine and gas chromatography was only 2.3%. Therefore, the first three variation sources were of importance for reducing measurement variation. 2) The variation induced by time was 42.9%. So it is a factor should be taken into account in design of comparison test of cigarette' s tar content.