http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tiêu chuẩn Việt Nam: Dầu thô. Xác định hàm lượng Niken, Natri, Kali, Canxi và Magie bằng phương pháp quan phổ hấp thụ nguyên tử: TCVN 5383 - 1991; TCVN 5384 - 1991; TCVN 5385 - 1991
Tiêu chuẩn này qui định phương pháp xác định niken, natri, kali, canxi và magie bằng phương pháp hấp thụ nguyên tử.