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

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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Determination of Mercury in Seafood by Flow Injection–Cold Vapor Atomic Absorption Spectrometry after Microwave Digestion: NMKL Interlaboratory Study

Journal of AOAC International ◽

10.1093/jaoac/85.3.626 ◽

2002 ◽

Vol 85 (3) ◽

pp. 626-631 ◽

Cited By ~ 8

Author(s):

Kaare Julshamn ◽

Jan Brenna ◽

B Åsman ◽

A Ekman ◽

A El-Ghauoui ◽

...

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Flow Injection ◽

Absorption Spectrometry ◽

Method Performance ◽

Cold Vapor ◽

Cold Vapor Atomic Absorption ◽

Relative Standard ◽

Standard Deviations

Abstract Ten laboratories participated in an interlaboratory method-performance (collaborative) study of a method for the determination of mercury in foods of marine origin by flow injection–cold vapor atomic absorption spectrometry after wet digestion using a microwave oven technique. The study was preceded by a training round of samples of known identity. The method was tested on a total of 7 seafood products: blue mussel (Mytilus edulis), cod muscle (Gadus morhua), crab (Cancer pagurus), scampi (Nephrops norwegicus), black scabbard fish (Aphnopus carbo), longnose velvet dogfish (Centroscymus crepidater), and Portuguese dogfish (Cenbroscymus coelolepis) with mercury concentrations of 0.14, 0.24, 0.35, 0.59, 1.42, 4.2, and 13.2 μg/g, respectively. The materials were presented to the participants in the study as blind duplicates, and the participants were asked to perform single determinations on each sample. Repeatability relative standard deviations (RSDr) for mercury ranged from 2.4 to 14.0%. Reproducibility relative standard deviations (RSDR) ranged from 7.7 to 16.6%. HORRAT values for all samples were <1.0.

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Preconcentration, Speciation, and Determination of Mercury by Solid Phase Extraction with Cold Vapor Atomic Absorption Spectrometry

Analytical Letters ◽

10.1080/00032719.2012.753608 ◽

2013 ◽

Vol 46 (7) ◽

pp. 1155-1170 ◽

Cited By ~ 23

Author(s):

Ali Rehber Türker ◽

Dilek Çabuk ◽

Özcan Yalçınkaya

Keyword(s):

Solid Phase Extraction ◽

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Solid Phase ◽

Absorption Spectrometry ◽

Phase Extraction ◽

Cold Vapor ◽

Cold Vapor Atomic Absorption

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

Journal of AOAC International ◽

10.1093/jaoac/85.1.149 ◽

2002 ◽

Vol 85 (1) ◽

pp. 149-152 ◽

Cited By ~ 2

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.

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Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Nickel after Extraction and Preconcentration onto Natural Modified Analcime Zeolite Loaded with 2-(5-Bromo-2-Pyridylazo)-5-Diethylaminophenol

Journal of AOAC International ◽

10.1093/jaoac/88.3.842 ◽

2005 ◽

Vol 88 (3) ◽

pp. 842-846 ◽

Cited By ~ 1

Author(s):

Darush Afzali ◽

Mohammad Ali Taher ◽

Ali Mostafavi ◽

Mohammad Khayatzadeh Mahani

Keyword(s):

Atomic Absorption ◽

Absorption Spectrometry ◽

Spectrometric Method ◽

Final Solution ◽

Flame Atomic Absorption ◽

Relative Standard ◽

Analytical Approaches ◽

Atomic Absorption Spectrometric ◽

Reference Samples

Abstract Nickel is a moderately toxic element compared with other transition metals. However, inhalation of nickel and its compounds leads to serious problems, including cancer of the respiratory system and a skin disorder, nickel-eczema. Thus, attention has focused on the toxicity of nickel at low concentrations, and the development of reliable, analytical approaches for the determination of trace amounts of nickel is needed. This paper describes a simple, rapid, and sensitive flame atomic absorption spectrometric method for the determination of trace amounts of nickel in various samples after adsorption of its 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol complex on a modified Analcime column in the pH range of 7.5–10.5. The retained analyte on the Analcime is recovered with 5.0 mL 2M nitric acid and determined by flame atomic absorption spectrometry. The detection limit is 20 ng/mL, and the calibration curve is linear for analyte concentrations in the range of 0.1–8 μg/mL final solution, with a correlation coefficient of 0.9993. Eight replicate determinations of nickel at 2 μg/mL in the final solution gave an absorbance of 0.1222, with a relative standard deviation (RSD) of ±1.2%. The interference of a large number of anions and cations was studied, and the proposed method was used for the determination of nickel in various standard reference samples. The accuracy of the proposed method was evaluated by analyzing standard reference samples, and the results were satisfactory (recoveries of >96%; RSD of <3.5%).

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