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Sample Drying, Total Sulfur and Stable Sulfur Isotopic Ratio Determination in Freshwater Wetland Peat
Author(s) -
Wieder R. Kelman,
Rodríguez Dawn,
Novák Martin
Publication year - 1996
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1996.03615995006000030038x
Subject(s) - peat , δ34s , sulfur , environmental chemistry , chemistry , wetland , freeze drying , soil water , organic matter , environmental science , chromatography , ecology , soil science , geology , paleontology , quartz , organic chemistry , fluid inclusions , biology
Air drying, oven drying, and freeze‐drying of submerged or wet soils and sediments prior to chemical analysis has been implicated as affecting measurements of total S concentrations, organic and inorganic S fractions, and δ 34 S ratios. Drying effects on S chemical determinations may not be consistent across all soil types, however. We evaluated the effects of drying method on total S concentrations and δ 34 S ratios in freshwater wetland peat collected from the New Jersey Pinelands. Total S concentrations in samples that were oven dried at 100°C, freeze‐dried, oven dried at 60°C, or air dried averaged 128.9, 128.0, 126.0, and 122.4 mmol kg −1 dry mass, respectively. Total S concentrations were significantly different only between the 100°C oven‐dried and air‐dried treatments. Drying method did not affect δ 34 S ratios. Freeze‐drying samples offers distinct advantages over other drying methods and is appropriate for determinations of S chemistry in freshwater wetland peat.