GB/T 21931.3-2008 (English Version) PDF

Standard No.: GB/T 21931.3-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21931.3-2008

Scope: WARNING: Personnel using this section should have practical experience in formal laboratory work. This section does not address all possible security issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. 1 Scope This part of GB/T 21931 specifies the phosphorus vanadium molybdenum yellow spectrophotometric method for the determination of phosphorus content in nickel, nickel-iron and nickel alloys. This section applies to the determination of phosphorus content in nickel, nickel-iron and nickel alloys. Measuring range (mass fraction): O.000 5% to 0.05%. Interference from elements such as arsenic, chromium, hafnium, niobium, silicon, tantalum, titanium, and tungsten can be ruled out by complexation effects and volatility (eg, chromium). When the content of interfering elements is low, the measured phosphorus content reaches a minimum of O.OOO 5% (mass fraction).

GB/T 21931.3-2008 Referenced Document

GB/T 6379.1 Accuracy(trueness and precision)of measurement methods and results Part 1:General principles and definitions
GB/T 6379.2 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method

2008 GB/T 21931.3-2008 Nickel,ferronickel and nickel alloys.Determination of phosphorus content.Phosphovanoclonolybeate molecular absorption spectrometric method