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.

Dry Ashing, Hydride Generation Atomic Absorption Spectrometric Determination of Arsenic and Selenium in Foods

1982 ◽  
Vol 65 (3) ◽  
pp. 647-650 ◽  
Author(s):  
Gerard K H Tam ◽  
Gladys Lacroix
Keyword(s):  
Detection Limit ◽  
Atomic Absorption ◽  
Reference Materials ◽  
Hydride Generation ◽  
Spectrometric Method ◽  
Flameless Atomic Absorption ◽  
Dry Ashing ◽  
Atomic Absorption Spectrometric ◽  
Certified Values

Abstract A dry ashing, flameless atomic absorption spectrometric method was evaluated to determine arsenic and selenium in foods. Samples were dry-ashed with Mg(N03)2-MgO and dissolved in HC1. Selenate was reduced to selenite by boiling in 4N HC1, and arsenate to arsenite by treatment with KI. Hydrides of arsenic and selenium were generated by the addition of NaBH4 and were swept by nitrogen and hydrogen into a thermally heated silicate tube furnace. The detection limit was about 5 ppb for each element based on a 10 g sample. Analytical results obtained for several samples of NBS reference materials agreed with the certified values. The procedure was evaluated by another laboratory and results were satisfactory.

Determination of Arsenic in Beverages and Foods by Hydride Generation Atomic Absorption Spectroscopy

1977 ◽  
Vol 10 (5) ◽  
pp. 357-369 ◽  
Author(s):  
Darryl D. Siemer ◽  
Richard K. Vitek ◽  
Prabhakaran Koteel ◽  
William C. Houser
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Hydride Generation

Comparative Research of Two Pretreatment Methods on Determination of Trace Manganese in Panax Pseudo-Ginseng Var. Notoginseng by Atomic Absorption Spectroscopy

2012 ◽  
Vol 554-556 ◽  
pp. 2064-2067
Author(s):  
Jin Yang ◽  
Wei Liu ◽  
Bao Sheng Wang ◽  
Qing Hua Li ◽  
Ping Yi ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Recovery Rate ◽  
Comparative Research ◽  
Manganese Content ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Better Than

In this research the atomic absorption spectroscopy method (the correlation coefficient was 0.9995) was employed for determination of the content of heavy metal-manganese in panax pseudo-ginseng var. notoginseng, which was chosen as the sample. The optimum conditions of two pretreatments were researched independently. In the dry ashing, the optimized temperature and time are 600°C and 4~6 hours respectively, and the manganese content determined is 53.16 ug/g and the recovery rate of manganese added in sample is 98.64%. In the wet digestion, The HNO3-H2O2 digestion system is the best one, and the content was 52.95ug/g and the recovery rate is 97.30%. So the two pretreatment methods of the sample are accurate enough on manganese content determination. But the dry ashing is better than the wet digestion relatively.

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.

Determination of cadmium in blood by use of atomic absorption spectroscopy with crucibles--and a rational procedure for dry-ashing.

1977 ◽  
Vol 23 (3) ◽  
pp. 555-559 ◽  
Author(s):  
L Vesterberg ◽  
T Bergström
Keyword(s):  
Stainless Steel ◽  
Detection Limit ◽  
Atomic Absorption ◽  
Atomic Absorption Spectroscopy ◽  
Signal Averaging ◽  
Blood Samples ◽  
Dry Ashing ◽  
Occupationally Exposed ◽  
Rational Procedure

Abstract A simple, minimal-reagent procedure for analysis of cadmium in blood is introduced. Blood samples from workers occupationally exposed to cadmium were collected with heparin. Titon X-100 surfactant was added, and 15-mul aliquots of the blood were pipetted into small nickel sampling cups and placed in a holder for 100 cups, which was enclosed in a stainless steel box. After the samples were dried and ashed in a muffle oven at various times and temperatures, cadmium was determined in an air/acetylene flame in an atomic absorption instrument with a deuterium arc background corrector. Absorbance measurements were made by signal-averaging facilities in the instrument. The conditions for analysis are specified. The method appears to be accurate and reproducible, with a CV of about 6% in the range 35-160 nmol/liter. The detection limit was 3.0 nmol/liter of blood. With the new procedure, many blood samples can be dried and ashed in parallel, which favors both simplicity and precision.

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