Determination of chromium in low-alloy steels by atomic-absorption spectrophotometry.
Iron causes severe depression of the signal in determination of chromium by atomic-absorption spectrophotometry in an air-acetylene flame. This effect can be eliminated by addition of hydroxylamine hydrochloride and use of a fuel-rich flame. Addition of iron to the standard solutions is not necessary for up to 300 ppm of iron in the test solution.
Pandey
L P
LP
National Metallurgical Laboratory, Jamshedpur-831007, India.
Ghose
A
A
Dasgupta
P
P
Rao
A S
AS