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Titolo:
Study of microwave digestion kinetics and establishment of a model for digestion efficiency prediction
Autore:
Ko, FH; Chen, HL;
Indirizzi:
Natl Nano Device Labs, Hsinchu 300, Taiwan Natl Nano Device Labs HsinchuTaiwan 300 evice Labs, Hsinchu 300, Taiwan
Titolo Testata:
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
fascicolo: 11, volume: 16, anno: 2001,
pagine: 1337 - 1340
SICI:
0267-9477(2001)16:11<1337:SOMDKA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLASMA-MASS SPECTROMETRY; BIOLOGICAL SAMPLES; TRACE-METALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Ko, FH Natl Nano Device Labs, 1001-1 Ta Hsueh Rd, Hsinchu 300, Taiwan NatlNano Device Labs 1001-1 Ta Hsueh Rd Hsinchu Taiwan 300 Taiwan
Citazione:
F.H. Ko e H.L. Chen, "Study of microwave digestion kinetics and establishment of a model for digestion efficiency prediction", J ANAL ATOM, 16(11), 2001, pp. 1337-1340

Abstract

The residual weight of a bottom anti-reflective coating (BARC) sample after microwave digestion was successfully used as an indicator to evaluate thedigestion kinetics. The weight degradation rate was independent of the sample weight under various temperatures, but was strongly dependent on the digestion acid volume and the digestion temperature. The temperature dependence of the weight degradation coefficient was effectively modeled by the Arrhenius equation. Furthermore, the activation energy for digestion (0.39 kcal mol(-1) for the BARC sample) was independent of the digestion acid volume. Mathematical modeling for prediction of digestion efficiency for the BARCsample was achieved by employing digestion kinetics as the backbone. With the empirical fitting of the pre-exponential factor, a novel equation incorporating the temperature, digestion acid volume, digestion time and sample weight was developed. Both gravimetric analysis and model simulation were performed to evaluate the feasibility of the one-step microwave digestion process.

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Documento generato il 03/04/20 alle ore 03:55:20