Slurry preparation by high-pressure homogenization for the determination of heavy metals in zoological and botanical certified reference materials and animal feeds by electrothermal atomic absorption spectrometry

The Analyst ◽  
1996 ◽  
Vol 121 (10) ◽  
pp. 1419 ◽  
Author(s):  
Yanxi Tan ◽  
Jean-Simon Blais ◽  
William D. Marshall
Keyword(s):  
Heavy Metals ◽  
High Pressure ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
High Pressure Homogenization ◽  
Slurry Preparation

scholarly journals Determination of Chromium in Biological Material by Electrothermal Atomic Absorption Spectrometry Method

2012 ◽  
Vol 56 (4) ◽  
pp. 585-589 ◽  
Author(s):  
Agnieszka Nawrocka ◽  
Józef Szkoda
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Graphite Furnace ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Magnesium Nitrate ◽  
Spectrometry Method ◽  
Total Chromium

Abstract Procedure for determination of chromium in biological materials by Zeeman graphite furnace atomic absorption spectrometry method using a Perkin-Elmer spectrometer equipped with hollow-cathode lamp at 357.9 nm was developed. The samples of animal tissues, food, and feed were digested in muffle furnace at 450ºC. The ash was dissolved in 1 N hydrochloric acid and the final solution was diluted in 0.2% nitric acid. Magnesium nitrate (1%) was used as a matrix modifier. The method was validated in terms of basic analytical parameters. The mean recoveries of chromium was 84.4% for muscle, 79.0% for canned meat, and 80.2% for feed, and analytical detection limit was 0.003 μg/g. Certified reference materials were used for analytical quality assurance. The proposed analytical procedure is well adapted for monitoring chromium content in food and feedstuffs. Content of total chromium in the tested samples (animal muscles and liver) was low and was situated in the range of 0.031-0.101 mg/kg (muscles) and 0.047-0.052 mg/kg (liver).

scholarly journals Determination of Cadmium, Aluminium, and Copper in Beer and Products Used in Its Manufacture by Electrothermal Atomic Absorption Spectrometry

2002 ◽  
Vol 85 (3) ◽  
pp. 736-743 ◽  
Author(s):  
Pilar Viñas ◽  
Nerea Aguinaga ◽  
Ignacio López-García ◽  
Manuel Hernández-Córdoba
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Sample Digestion ◽  
Low Concentrations

Abstract Procedures were developed for determining cadmium, aluminium, and copper in beer and the products used in its manufacture by electrothermal atomic absorption spectrometry. Beer samples were injected into the furnace and solid samples were introduced as suspensions after preparation in a medium containing hydrogen peroxide, nitric acid, and ammonium dihydrogen phosphate for cadmium atomization. Calibration was performed with aqueous standards, and characteristic masses and detection limits were, respectively, 1 and 0.3 pg for cadmium, 18 and 5.4 pg for aluminium, and 5.6 and 6.8 pg for copper. Different samples of beer, wort, brewer's yeast, malt, raw grain, and hops were analyzed by the proposed procedures. Cadmium was found in low concentrations (0.001–0.08 μg/g and 0–1.3 μg/mL); copper (3–13 μg/g and 25–137 μg/mL) and aluminium (0.6–9 μg/g and 0.1–2 μg/mL) were found at higher levels. The reliability of the procedure was confirmed by comparing the results obtained with others based on microwave oven sample digestion, and by analyzing several certified reference materials.

scholarly journals Determination of Selenium in Marine Biological Tissues by Transverse Heated Electrothermal Atomic Absorption Spectrometry with Longitudinal Zeeman Background Correction and Automated Ultrasonic Slurry Sampling

2001 ◽  
Vol 84 (6) ◽  
pp. 1921-1926 ◽  
Author(s):  
Hortensia Méndez ◽  
Fausto Alava ◽  
Isela Lavilla ◽  
Carlos Bendicho
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Biological Tissues ◽  
Slurry Sampling ◽  
Hno3 Solution ◽  
Marine Biological

Abstract A fast, sensitive, and reliable method for determination of selenium in marine biological tissues by electrothermal atomic absorption spectrometry with slurry sampling was developed. Slurries were prepared from fresh and frozen seafood samples that were previously homogenized, dried, and ground; particle sizes <100 μm were taken for analysis. A 3% (v/v) HNO3 solution containing 0.01% (v/v) Triton X-100 was used as slurry diluent. Slurries were mixed on an automated ultrasonic slurry sampler at 20% amplitude for 30 s just before an aliquot was injected into the furnace. The method was successfully validated against the following certified reference materials: NRCC CRM DORM-2 (Dogfish muscle); NRCC CRM TORT-2 (Lobster hepatopancreas); NRCC CRM DOLT-2 (Dogfish liver); and BCR CRM 278 (Mussel tissue), and was subsequently applied to determination of Se in 10 marine biological samples. The influences of the drying procedure (oven-, microwave-, and freeze-drying), matrix modifier amount, mass of solid material in cup, and pipetting sequence are discussed. The limit of determination of Se was 0.16 μg/g and the repeatability, estimated as between-batch precision, was in the range of 4–8%. Se contents in the samples ranged from 0.6 to 2.8 μg/g. The proposed method should be useful for fast assessment of the daily dietary intake of Se.

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