What is ISO 4939- Determination of nickel about?
ISO 4939 is a safety standard for determining nickel.
ISO 4939 specifies a spectrophotometric method for the determination of nickel in steel using dimethylglyoxime.
Note: The method is applicable to the determination of nickel mass fractions in the range of 0,10 % and 2,0 %. Cobalt, copper, and manganese can cause interferences.
Who is ISO 4939- Determination of nickel for?
ISO 4939 on determining nickel is relevant to:
- Testing authorities
- Manufacturers of measuring apparatus and laboratory equipment
- Manufacturers of spectrophotometer
- Steel industries
Why should you use ISO 4939- Determination of nickel?
Nickel is a hard silver-white metal, which forms cubic crystals.
ISO 4939 assists with the test method for determining nickel from steel which consists of a dissolution of a test portion in hydrochloric, nitric, and perchloric acids, formation of a coloured complex of nickel(lll) with dimethylglyoxime in an ammoniacal solution containing iodine and potassium iodide and spectrophotometric measurement at a wavelength of about 535 nm. A planned trial of this method was carried out by five laboratories, at six levels of nickel, each laboratory making six determinations of nickel at each level and the results obtained were treated statistically.
Overall, ISO 4939 is useful as it provides guidance on determining nickel from steel using the dimethylglyoxime spectrophotometric method which can be helpful for your business.
What’s changed since the last update?
BS ISO 4939:2016 supersedes BS 6200-3.20.3:1985 which is withdrawn.
BS ISO 4939:2016 replaces the first edition (ISO 4939:1984), which has been technically revised. In particular, the specification of plotting of the calibration graphs shown in 7.4.3 has been corrected.
