Atomic-absorption determination of strontium in silicate rocks: a study of major element interferences in the nitrous oxide-acetylene flame

The Analyst ◽  
1975 ◽  
Vol 100 (1195) ◽  
pp. 721 ◽  
Author(s):  
D. Carter ◽  
J. G. T. Regan ◽  
J. Warren
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Major Element ◽  
Atomic Absorption Determination ◽  
Absorption Determination ◽  
Silicate Rocks

Atomic Absorption Determination of Tin in Foods: Collaborative Study

1979 ◽  
Vol 62 (5) ◽  
pp. 1050-1053
Author(s):  
Edgar R Elkins ◽  
Arlene Sulek
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Fruit Juice ◽  
Collaborative Study ◽  
Green Beans ◽  
Absorption Signal ◽  
Atomic Absorption Determination ◽  
Absorption Determination

Abstract Samples of green beans, applesauce, and a fruit juice were fortified with tin at 3 levels. Collaborators were asked to digest the samples, using HNO3-H2SO4, add methanol to enhance the absorption signal, and aspirate directly, using a nitrous oxide-acetylene flame. Results were received from 8 laboratories including 4 from Europe. However, only 6 laboratories used the prescribed methodology. All results were considered acceptable. The method has been adopted as interim official first action.

Atomic absorption determination of Hg (II), Cd (II), and As (III) in natural and waste water after preliminary group preconcentration

2019 ◽  
Vol 85 (2) ◽  
pp. 12-16
Author(s):  
I. V. Saunina ◽  
E. N. Gribanov ◽  
E. R. Oskotskaya
Keyword(s):  
Waste Water ◽  
Atomic Absorption ◽  
High Sensitivity ◽  
Distribution Coefficients ◽  
Neutral Medium ◽  
Atomic Absorption Determination ◽  
Absorption Determination ◽  
Relative Standard ◽  
Preliminary Group

The sorption of Hg (II), Cd (II), and As (III) by natural aluminosilicate is studied. It is shown that the mineral absorbs those toxicants in a rather wide pH range, quantitative extraction of analytes being achieved in a neutral or close to neutral medium (pH values range within 7.0 - 8.0; 6.3 - 7.5; 7.4 - 8.5 for Hg (II), As (III), and Cd (II), respectively). The effect of the time of phase contact on the degree of extraction of elements is shown. The sorption capacity of the mineral in optimal conditions of the medium acidity (0.06 mmol/g for mercury, 0.31 mmol/g for cadmium, and 0.52 mmol/g for arsenic) is determined. The distribution coefficients attain values of aboutnX 103-nX 104. A new combined method for determination of Hg (II), Cd (II), and As (III) in natural and waste water is developed and tested. The method consists in a preliminary group sorption concentration of the analytes by aluminosilicate, desorption of the analytes from the surface of the mineral and their subsequent atomic absorption determination. The correctness of the method is verified in analysis of spiked samples. The method is easy to use and exhibits high sensitivity, reproducibility and accuracy of analyte determination. The relative standard deviation does not exceed 0.13. Economic availability and possibility of using domestic sorption materials are the important advantages of the proposed procedure which can be used in the practice of laboratories monitoring the quality and safety of environmental objects.

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