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Titolo:
ORTHOGONAL ARRAY DESIGN (OAD) FOR THE OPTIMIZATION OF MERCURY EXTRACTION FROM SOILS BY DILUTE-ACID WITH MICROWAVE-HEATING
Autore:
GU W; ZHOU CY; WONG MK; GAN LM;
Indirizzi:
NATL UNIV SINGAPORE,DEPT CHEM,LOWER KENT RIDGE RD SINGAPORE 119260 SINGAPORE NATL UNIV SINGAPORE,DEPT CHEM SINGAPORE 119260 SINGAPORE
Titolo Testata:
Talanta
fascicolo: 5, volume: 46, anno: 1998,
pagine: 1019 - 1029
SICI:
0039-9140(1998)46:5<1019:OAD(FT>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATOMIC-ABSORPTION SPECTROMETRY; BIOLOGICAL SAMPLES; ENVIRONMENTAL MATERIALS; CHEMOMETRIC METHOD; TRACE-METALS; SEDIMENTS; DIGESTION; DECOMPOSITION; DISSOLUTION;
Keywords:
DILUTE ACID; MERCURY; MICROWAVE DIGESTION; SOIL; ORTHOGONAL ARRAY DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
W. Gu et al., "ORTHOGONAL ARRAY DESIGN (OAD) FOR THE OPTIMIZATION OF MERCURY EXTRACTION FROM SOILS BY DILUTE-ACID WITH MICROWAVE-HEATING", Talanta, 46(5), 1998, pp. 1019-1029

Abstract

The use of dilute acid for mercury extraction from geological sampleswith microwave assisted heating was investigated. An orthogonal arraydesign OA(16)(4(1) x 2(12)) was applied to select the optimum conditions. The effects of the concentration of HNO3, the additions of HCl and H2SO4, the extraction time and their interactions were evaluated by the mixed-level orthogonal array design (OAD). The results indicated that the addition of small amount of HCl would improve significantly the extraction of mercury from soil matrices. From the study, it is seenthat the mercury in the soil matrices could be extracted completely by 14% (v/v) HNO3 With Small quantity of HCl. The effects of the pressure within the digestion vessel and the sample mass were studied under the optimum conditions derived from the OAD. The extraction methods with optimum conditions were evaluated by determining mercury in NIST SRM 1645 River Sediment, NIES CRM No. 2 Pond Sediment and NRCC BCSS-1 Marine Sediment. Recoveries of 78-109% were achieved. Good mean recoveries of 95-98% were also obtained from real soil samples spiked with different species of mercury. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 01:55:36