Determination of trace level of selenium and mercury in photographic emulsions by atomic spectroscopy techniques.
Trace level of selenium and mercury in photographic emulsion are used to improve photographic properties. The presence of silver halide in photographic emulsion does not allow the application of the most common analytical methods such as Hydride Generation Atomic Absorption Spectrometry (HG-AAS) and cold vapour Atomic Absorption Spectrometry (CV-AAS). Besides, silver removal was not quantitative, leading to a significant loss of the analytes and low reproducibility. The present work suggest the use of inductively coupled plasma Atomic Emission Spectrometry (ICP-AES) equipped with Ultrasonic Nebulizer (USN) for direct aqueous samples analysis at microgram l-1 level (d.l. 5.1 ppb for Hg and 6.1 ppb for Se).
Magi
Emanuele
E
Dipartimento di Chimica e Chimica Industriale, Sezione di Chimica Analitica ed Ambientale, Università di Genova, Via Dodecaneso 31, 16146 Genova, Italy. magie@chimica.unige.it
Soggia
Francesco
F
Frache
Roberto
R
D004655:Emulsions; D008628:Mercury / Q000032:analysis*; D010781:Photography; D012643:Selenium / Q000032:analysis*; D013054:Spectrophotometry, Atomic
D004655:Emulsions; D008628:Mercury; D012643:Selenium