关键词: 聚丙烯成型品, 蒸发残渣, 不确定度

Abstract:

Sample pretreatment and analysis were performed according to GB/T 5009.60 — 2003 Hygienic standard for polypropyrene products used as food containers and tablewares in the determination of evaporation residue of polypropyrene products in contact with foodstuffs. Based on analytical data, mathematical models were developed for uncertainty evaluation for the determination. Each uncertainty component was calculated by analyzing the source of uncertainty generated during the determination steps. When the evaporation residue content (n-hexane) was 30.1 mg/L, the relative standard uncertainty was 1.99 mg/L, and the expanded uncertainty was 4.0 mg/L (k = 2).

Key words: polypropyrene products, evaporation residue content, uncertainty