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Comparison of three aqua regia digestion methods for twenty Florida soils
Chen, M; Ma, LQ
2001-03-01
Source PublicationSOIL SCIENCE SOCIETY OF AMERICA JOURNAL
Volume65Issue:2Pages:491-499
AbstractIt is important to evaluate different digestion methods to accurately determine elemental concentrations in soils. Three commonly used digestion procedures, hotplate aqua regia, microwave aqua regia, and microwave aqua regia + HF, were compared for digestion of three standard reference materials (SRMs 2704, 2709, and 2711) and 20 Florida soils (three groups of Quartzipsammemts, one group of Alaquods, and one group of Paleudults). Sixteen elements (Al, Pa, Ca, Fe, K, Mg, Mn, P, Zn, As, Cd, Cr, Cu, Ni, Pb, and Se) were analyzed using either an inductively coupled plasma optical emission spectrometer (ICP-OES) or a graphite furnace atomic absorption spectrophotometer (GFAAS). Precise analysis was achieved for all elements except As (1.0-25%), Cd (1.8-22%), and Se (4.1-22%) in the SRMs using all three procedures, with the microwave aqua regia + HF procedure having slightly better precision (3.7%) averaged across all elements. Compared with the elemental recoveries in SRMs by the microwave aqua regia digestion (80%), microwave aqua regia + HF digestion achieved greater accuracy (94%), whereas the hotplate aqua regia digestion achieved less accuracy (74%). In general, the microwave aqua regia + HF digestion was overall the best procedure for determining concentrations of most metals in SRMs and Florida soils, followed by the microwave aqua regia and the hotplate aqua regia digestion. However, this so-called total-total digestion procedure (microwave aqua regia + HF) may underestimate total Pb concentration in Florida soils and total Al, Ca, Fe, Mg, and Ba concentrations in the Florida Paleudults.
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedAgriculture
WOS KeywordATOMIC-ABSORPTION SPECTROMETRY ; CERTIFIED REFERENCE MATERIALS ; ASSISTED SAMPLE PREPARATION ; MICROWAVE-OVEN ; DECOMPOSITION PROCEDURES ; EMISSION-SPECTROMETRY ; SEQUENTIAL EXTRACTION ; SEDIMENT SAMPLES ; TRACE-ELEMENTS ; HEAVY-METALS
Indexed BySCI
Language英语
WOS SubjectSoil Science
WOS IDWOS:000169464300028
PublisherSOIL SCI SOC AMER
Citation statistics
Cited Times:244[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68310
Collection中国科学院地理科学与资源研究所
Corresponding AuthorChen, M
Affiliation1.Chinese Acad Sci, Inst Geog & Nat Resources, Beijing 100101, Peoples R China
2.Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA
Recommended Citation
GB/T 7714
Chen, M,Ma, LQ. Comparison of three aqua regia digestion methods for twenty Florida soils[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2001,65(2):491-499.
APA Chen, M,&Ma, LQ.(2001).Comparison of three aqua regia digestion methods for twenty Florida soils.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,65(2),491-499.
MLA Chen, M,et al."Comparison of three aqua regia digestion methods for twenty Florida soils".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 65.2(2001):491-499.
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