Review of reagents for spectrophotometric determination of gold.
The solution was heated and simmered gently after the addition of 5 mL of concentrated HNO 3 , until all carbides were decomposed.
With suitable masking, the reaction can be made highly selective and reagent blank do not show any absorbance.
Less-sensitive, Gowda et al.
It was then diluted up to the mark with de-ionized water.
Nataly Gold Anal Golden Hour
Jamaluddin Ahmed, Fax: ; Email: moc. The proposed method is very highly sensitive. The solution was stored in a polypropylene bottle. Solid phase extraction and spectrophotometric determination of Au III with 5- 2-Hydroxynitrophenylazo -thiorhodanine. Less-sensitive Methylene Blue 1. Each filtered with Whatman No. Merck Darmstadt, Germany in — mL in doubly distilled de-ionized water, sonicated for 15 min and diluted up-to the mark with de-ionized water when it became transparent.