Determination of arsenic in arsenic compounds and marine biological tissues using low volume microwave digestion and electrothermal atomic absorption spectrometry

1999 ◽  
Vol 14 (8) ◽  
pp. 1193-1207 ◽  
Author(s):  
Michelle Deaker ◽  
William Maher
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Microwave Digestion ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Biological Tissues ◽  
Arsenic Compounds ◽  
Marine Biological ◽  
Low Volume

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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