Copper, iron and sodium interferences in the determination of gold by atomic absorption spectrometry with particular reference to cyanide solutions
✍ Scribed by Dean S. Brooks; James R. Flatt
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 769 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
Gold may be determmed directly m ml11 cyamde solutions by direct atomic absorption spectrometry wth an ax-acetylene flame hi111 solutions contam many major species apart from the trace gold (of the order of 1 pg ml-' here), including sodmm, cyanide, hydromde, copper and Iron An mvestrgation mto interferences thought to be due to copper and/or iron revealed that copper causes neghglble mterferences Iron causes severe and non-hnear Interference m pure solutions contammg only gold and Iron m either acid or base, however, these are effectively nullified m artlficlal ml11 solutions due to the releasmg action of copper itself and also of cyamde Actual roll samples may therefore be aspirated directly wthout compensatory pre-treatment or standard matchmg Apparent gold absorbances were, however, found to be enhanced by sodmm Thus enhancement IS quantifiable, bemg hnear for the concentrations of speaes Investigated