A New Microwave Acid Digestion Bomb Method for the Determination of Total Fluorine

1998 ◽  
Vol 32 (5) ◽  
pp. 378-384 ◽  
Author(s):  
S.R. Grobler ◽  
A.J. Louw
Keyword(s):  
Acid Digestion ◽  
Bomb Method

scholarly journals Determination of Platinum in Wine by Graphite Furnace Atomic Absorption Spectrometry

1997 ◽  
Vol 80 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Carmen Cabrera-Vique ◽  
Pierra-Louis Teissedre ◽  
Marie-Thérèse Cabanis ◽  
Jean-Claude Cabanis
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
White Wines ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A method based on graphite furnace atomic absorption spectrometry (GFAAS) was developed for determining platinum in wine. Wine samples were prepared by microwave acid digestion or dry mineralization. The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples. Analyte modifiers and furnace conditions were optimized. Effects of cations (Mg2+, Ca2+, K+, Na+, and NH|) and anions (PO43, SO42) were tested separately and in combination. Analytical characteristics of the method were optimized for analyte recovery and signal enhancement. Recoveries ranged from 92.5 to 102%, and precision reproducibility relative standard deviation varied from 7.5 to 10%. Red, rosé, and white wines from France were analyzed. Platinum levels found in most wines were very low (<10 μg/L).

The Determination of Iodine in Biologic Material

1964 ◽  
Vol 10 (9) ◽  
pp. 799-823 ◽  
Author(s):  
H Hoch ◽  
S L Sinnett ◽  
T H McGavack
Keyword(s):  
Sulfuric Acid ◽  
Sulfate Reduction ◽  
Perchloric Acid ◽  
Healthy Subjects ◽  
Test Sample ◽  
Chloric Acid ◽  
Total Serum ◽  
Acid Digestion ◽  
Reduction Test

Abstract The chloric acid digestion of serum, followed by the ceric sulfate reduction test for iodine has been shown to give results reproducible to within ± 0.00035 µg. iodine per test sample (1) if the entire digestion tubes are kept hot during the combustion step so that products of incomplete oxidation are vaporized, (2) if the perchloric acid and sulfuric acid concentrations in the final digest are adjusted to 1.64 normal (16.5%) and 0.37 normal, respectively, (3) if attention is paid to the order of addition of the reagents, and (4) if the arsenite reagent is added within a fraction of a second. The method gave values for total serum iodine in 20 healthy subjects between 5 and 10.5 µg./100 ml.

Comparison of Different Methods for Estimating the Leaching of Heavy Metals from Coal Combustion Waste

1983 ◽  
Vol 15 (11) ◽  
pp. 193-205 ◽  
Author(s):  
Merete Reuss
Keyword(s):  
Coal Combustion ◽  
Coal Fly Ash ◽  
Strong Acid ◽  
Atomic Absorption Spectrophotometry ◽  
Leaching Test ◽  
Acid Digestion ◽  
Leaching Experiments ◽  
Leaching Methods ◽  
Digestion Methods

Literature on the different leaching methods for estimating the heavy metal content in coal fly ash was studied and is herein summarized. Attention is given to some of the practical problems which must be addressed in planning a leaching test. Strong acid digestion and several methods for the determination of total metal concentration are discussed. Results of leaching experiments with 6 different fly ashes are reported. Ag, As, Cd, Cr, Cu, Hg, Mo, Ni, Pb, Se, V, Zn, Na, K, Ca, and Mg were determined. These same metals were determined by atomic absorption spectrophotometry after both nitric acid and hydrofluoric acid digestion. The two digestion methods are compared.

Determination of trace elements in organic material by the oxygen bomb method

1968 ◽  
Vol 40 (13) ◽  
pp. 2031-2033 ◽  
Author(s):  
Shizuo. Fujiwara ◽  
Hisatake. Narasaki
Keyword(s):  
Trace Elements ◽  
Organic Material ◽  
Oxygen Bomb ◽  
Bomb Method
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