เคมี
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOAC
935.50
Lead: Suitability of Methods and Precautions
1935 (2023)
First Action
2
AOAC 2023 Online Ch. 9.2.12
Instrumental methods, polarography and atomic absorption (AA) spectrophotometry, are generally more reliable than colorimetric method at lower concentrations. 972.25 (see 9.2.19) is particularly applicable to products containing high Ca concentration...