https://www.bsbedge.com/standard/standard-test-method-for-determination-of-phosphorous-in-nickel-ferronickel-and-nickel-alloys-by-phosphovanadomolybdate-molecular-absorption-spectrometric-method/ASTM013352
ASTM E1917 : 1997 Standard Test Method for Determination of Phosphorous in Nickel, Ferronickel, and...
ASTM E1917 : 1997 Standard Test Method for Determination of Phosphorous in Nickel, Ferronickel, and Nickel Alloys by Phosphovanadomolybdate Molecular...