Chromatography Forum

Hi everyone! I'm looking to separate nickel from a meteorite sample and I have a pretty solid plan... however I'd like to know the disadvantages of using the following methods:

Quinoxoline Complexation with Spectrophotometric Determination (using pre-separation to remove interferences)

Quinoxoline Complexation with Spectrophotometric Determination (using multiple absorbance measurements at multiple wavelengths and standards for any interfering species to determine the amounts of both nickel and interferents)

Dimethylglyoxime Precipitation and Determination by Gravimetry

anything would be appreciated!!!

Anything in the literature that you've been looking at? I would assume that these questions get asked with reference to terestrial ores.

My first thought is that dissolving in nitric acid and doing flame photometry would be a *lot* simpler.

I reckon also. It is possible to remove nickel in a stream of CO (as a volatile carbonyl complex) and re-deposit it be decomposing back to CO and nickel, not sure how quantitative that is.