ผลิตภัณฑ์อาหาร เครื่องดื่ม อาหารสัตว์
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOCS
Ca 18c-91
Lead by Graphite Furnace Atomic Absorption Spectrophotometry
2017
5
665.0288 AOCS 7th ed. 2017-2019 rev. Ref.
This method is used for the determination of trace amounts (µg/kg) of lead. The method requires the vaporization of the oil or fat in a suitable graphite furnace, with or without a platform, connected to an atomic absorption spectrometer (previously calibrated using standard solutions of an organocompound of lead), followed by the measurement of the metal content from the observed absorption at a wavelength of 283.3 nm (see References, 1 and 2). Applicable to the determination of lead in all types of crude or refined edible oils and fats. This method is equivalent to International Union of Pure and Applied Chemistry Standard Method (IUPAC) 2.632 (References, 1 and 2).