The determination of metal content in biochemical products by atomic absorption spectroscopy. I

1970 ◽  
Vol 58 (5) ◽  
pp. 879-883
Author(s):  
Gloria C. Toralballa ◽  
Gerald I. Spielholtz ◽  
Ralph J. Steinberg
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Metal Content

Determination of Arsenic in Beer by Dry Ashing, Hydride Generation Atomic Absorption Spectroscopy

1989 ◽  
Vol 72 (2) ◽  
pp. 282-285 ◽  
Author(s):  
Ma Luisa Cervera ◽  
Ascensio Navarro ◽  
Rosa Montoro ◽  
Ramon Catala ◽  
Nieves Ybańez
Keyword(s):  
Organic Matter ◽  
Detection Limit ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Metal Content ◽  
Hydride Generation ◽  
Dry Ashing ◽  
Spanish Legislation

Abstract A method has been developed for determination of arsenic in beer. Organic matter is destroyed by the dry-ashing technique, the ash is dissolved in HC1, and hydrides of arsenic are generated by addition of sodium borohydride prior to atomization in a flame-heated quartz cell and atomic absorption spectroscopy measurement. The analytical features of the method are detection limit 0.1 ng/g beer, precision 8%, and recovery 97 ± 7%. The arsenic contents of different brands from Spain and other European countries were analyzed. In all samples, the arsenic levels found were well below maximum levels allowed in Spanish legislation (100 ng/g). The quantities of arsenic in Spanish beers do not differ from those found in foreign beers. No differences were found between bottled and canned beers, and no correlation exists between metal content and original specific gravity of the beers.

Analysis of Organo-Metallic Fungicides and Related Compounds by Atomic Absorption Spectroscopy

1966 ◽  
Vol 49 (1) ◽  
pp. 1-8
Author(s):  
B J Gudzinowicz ◽  
V J Luciano
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Metal Content ◽  
Leaf Extract ◽  
Derivatives Of ◽  
Related Compounds ◽  
Nitrate Anions ◽  
Iron And Manganese

Abstract A method is proposed for the analysis of organo-metallic fungicides (derivatives of thiocarbamic acids) and related compounds by atomic absorption spectroscopy. The effect of chloride and nitrate anions on absorption and sensitivity was investigated. The differences in the results by use of a single Zeiss or three Beckman burners with the spectrometer’s 5-pass optical system were negligible. Yellow wax bean and cucumber leaves were stripped with chloroform and with pyridine and analyzed for their external cation content. The standard recoveries of zinc added to the leaf extract were 95–100% with chloroform and 100–102% with pyridine. Calibration curves were established for the determination of the metal content of maneb (manganous ethylenebisdithiocarbamate), manganous acetylacetonate, ferbam (ferric dimethyldithiocarbamate), iron acetylacetonate, ziram (zinc dimethyldithiocarbamate), zineb (zinc ethylenebisdithiocarbamate), and zinc acetylacetonate. The most favorable concentration ranges for the analysis of zinc, iron, and manganese (10–50% absorption) are 0.07–0.50, 0.70–5.0, and 0.4–2.0 ppm, respectively.

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