Firestone D
U.S. Food and Drug Administration, Division of Pesticides and Industrial Chemicals, Washington, DC 20204.
J AOAC Int. 1994 Jul-Aug;77(4):951-4.
The IUPAC Commission on Oils, Fats, and Derivatives undertook development of a method and collaborative study for the determination of lead in oils and fats by direct graphite furnace-atomic absorption spectrophotometric method. Various types of graphite furnaces were used with or without platform. Twenty-three collaborators from 12 countries participated in the study. The materials tested were edible oils (soybean oil) and fats (cocoa butter) containing lead at 3 concentration levels (low, medium, and high). Each level was represented by 2 batches provided in duplicate (blind coded), so that each collaborator received a total of 24 test samples. Collaborators were instructed to analyze each in duplicate and report both results. Twenty collaborators returned the results of the study. After data from laboratories that did not follow the instructions were excluded, only 16 sets of data were evaluated statistically. The method for determination of lead in oils and fats by direct graphite furnace-atomic absorption spectrophotometry has been adopted first action by AOAC INTERNATIONAL as an IUPAC-AOCS-AOAC method.
国际纯粹与应用化学联合会（IUPAC）油脂及衍生物委员会开展了一项通过直接石墨炉原子吸收分光光度法测定油脂中铅含量的方法开发及协同研究。使用了各种类型的石墨炉，有平台或无平台。来自12个国家的23名合作者参与了该研究。所测试的材料为含铅的食用油（大豆油）和脂肪（可可脂），铅含量有3个浓度水平（低、中、高）。每个水平由2批样品代表，每批样品一式两份（盲编码），因此每个合作者共收到24个测试样品。要求合作者对每个样品进行两次分析并报告两个结果。20名合作者返回了研究结果。在排除未遵循指示的实验室的数据后，仅对16组数据进行了统计评估。通过直接石墨炉原子吸收分光光度法测定油脂中铅含量的方法已被美国官方分析化学家协会（AOAC INTERNATIONAL）首次采用，作为一种IUPAC - AOCS - AOAC方法。
