Stationary cold-vapor atomic absorption spectrometric method for mercury determination

1978 ◽  
Vol 50 (3) ◽  
pp. 412-414 ◽  
Author(s):  
Soo-Loong. Tong
Keyword(s):  
Atomic Absorption ◽  
Spectrometric Method ◽  
Mercury Determination ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Atomic Absorption Spectrometric

scholarly journals Routine, High-Sensitivity, Cold Vapor Atomic Absorption Spectrometric Determination of Total Mercury in Foods after Low-Temperature Digestion

2002 ◽  
Vol 85 (5) ◽  
pp. 1136-1143 ◽  
Author(s):  
Robert W Dabeka ◽  
Peter Bradley ◽  
Arthur D Mckenzie
Keyword(s):  
Atomic Absorption ◽  
Potassium Dichromate ◽  
National Research Council ◽  
High Sensitivity ◽  
Spectrometric Method ◽  
Cold Vapor ◽  
Routine Manner ◽  
Cold Vapor Atomic Absorption ◽  
Atomic Absorption Spectrometric

Abstract A cold vapor atomic absorption spectrometric method was developed for the subnanogram-per-gram determination of total Hg in a wide variety of foods. Foods were weighed into 50 mL polypropylene centrifuge tubes and dried without charring at 55°C in a circulating oven. Samples were then digested at 58°C with HNO3, HCl, and H2O2. After matrix modification with solutions of 2% Mg(NO3)2, 0.01% Triton X-100, and Cu(II) at 10 μg/mL, samples were analyzed by using a CeTAC Technologies M-6000A dedicated Hg analyzer. Based on a 2 g sample weight, the detection limit of the method over 12 batches averaged 0.30 ng/g wet weight and ranged from 0.03 to 0.6 ng/g. Recoveries of Hg added to 17 different foods, analyzed in a routine manner, averaged 97%, and individual recoveries ranged from 77 to 107%. Accuracy was confirmed by analysis of 7 biological reference materials from the National Research Council of Canada and the National Institute of Standards and Technology. Stabilization of low concentrations of Hg in solutions containing no sample was required to prevent loss of Hg from blanks. In a comparison of NaCl, potassium dichromate, and Au(III), chloride was much more effective for stabilization than the other two, and HCl was used for subsequent stabilization.

Improved Apparatus for Rapid Mercury Determination by Cold Vapor Atomic Absorption Spectrometry

1983 ◽  
Vol 66 (5) ◽  
pp. 1117-1120
Author(s):  
Lawrence Kupchella ◽  
Augusta Syty ◽  
John J Mahfood
Keyword(s):  
Atomic Absorption ◽  
Analytical Signal ◽  
Absorption Spectrometry ◽  
Water Quality Control ◽  
Injection Port ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Relative Standard ◽  
Atomic Absorption Spectrometric

Abstract A glass reaction vessel is described and the convenience and simplicity of its use in cold vapor atomic absorption spectrometric determination of mercury are pointed out. The vessel is easy to construct and requires only 15 s for collection of the analytical signal. It provides for continuous flow of carrier gas, and contains a septum-covered sample injection port, a buret for rapid introduction of reagent, and a drain stopcock. Using this apparatus, the relative standard deviation is 2.9% at the 40 ng Hg/mL level. The detection limit is 1 ng/mL. Applicability of the apparatus is proved by analysis of 3 commercial waste water quality control samples.

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