University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Polymer -> polyethylene terephthalate

Citations 1

"Determination Of Germanium By Hydride Generation Inductively Coupled Plasma Atomic Emission Spectrometry Combined With Flow Injection"
J. Anal. At. Spectrom. 1988 Volume 3, Issue 4 Pages 579-582
Fumio Nakata, Hiroshi Sunahara, Hiroyoshi Fujimoto, Manabu Yamamoto and Takahiro Kumamaru

Abstract: The sample (20 to 40 mg) of single-crystal gallium arsenide was dissolved in HNO3 and the solution was diluted with water to 25 mL. A 1 mL aliquot was analyzed by a system (illustrated) consisting of a PTFE flow injection manifold by which the sample is mixed with sodium phosphate buffer (pH 6.5), NaBH4 solution and Ar (carrier gas), and a gas - liquid separator, constructed from micro-porous PTFE (cf. Yamamoto et al., Anal. Chem., 1987, 59, 2446), that delivers the generated hydrides directly into the sample introduction tube of the ICP torch (central orifice 0.6 mm i.d.) for determination of Ge at 265.18 nm. The calibration graph was rectilinear for 1 ng mL-1 to 10 µg mL-1 of Ge; the detection limit was 0.4 ng mL-1. By using the method of standard additions, recovery of 4 ng mL-1 of Ge from non-doped, Zn-doped and Si-doped gallium arsenide was satisfactory, but no indigenous Ge was detected. The method was also applied in the analysis of poly(ethylene terephthalate) (sample prep. described); recoveries were 90 to 120%, and 2.5 to 3.1 ng mL-1 of Ge was detected, which is better than the detection limit (5 ng mL-1) of the official method. The sample throughput was ~150 h-1.
Germanium Spectrophotometry Gas diffusion Method comparison Standard additions calibration Teflon membrane