Stationary cold-vapor atomic absorption spectrometric attachment for determination of total mercury in undigested fish samples

1980 ◽  
Vol 52 (3) ◽  
pp. 581-583 ◽  
Author(s):  
Soo Loong. Tong ◽  
Wooi Kwee. Leow
Keyword(s):  
Atomic Absorption ◽  
Total Mercury ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Fish Samples ◽  
Atomic Absorption Spectrometric

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.

scholarly journals Rapid Food Decomposition by H2O2–H2SO4 for Determination of Total Mercury by Flow Injection Cold Vapor Atomic Absorption Spectrometry

2002 ◽  
Vol 85 (1) ◽  
pp. 149-152 ◽  
Author(s):  
Odair Zenebon ◽  
Alice M Sakuma ◽  
Sergio Dovidauskas ◽  
Isaura A Okada ◽  
Franca D De Maio ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Injection ◽  
Marine Algae ◽  
Total Mercury ◽  
Absorption Spectrometry ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Limit Of Quantitation

Abstract A mixture of 50% H2O2–H2SO4 (3 + 1, v/v) was used for decomposition of food in open vessels at 80°C. The treatment allowed rapid total mercury determination by flow injection cold vapor atomic absorption spectrometry. Cabbage, potatoes, peanuts paste, hazelnuts paste, oats, tomatoes and their derivatives, oysters, shrimps, prawns, shellfish, marine algae, and many kinds of fish were analyzed by the proposed methodology with a limit of quantitation of 0.86 ± 0.08 μg/L mercury in the final solution. Reference materials tested also gave excellent recovery.

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.

Sign in / Sign up

Export Citation Format

Share Document