Separating of organic and inorganic forms of metals in sediments
Separating organic forms of trace metals from their pyritic forms is a difficult problem one constantly faced when studying trace metals in a reduced soil. It is known that pyritic forms and organic forms of metals can be separated by solubilizing pyritic forms in a reducing agent while leaving the organic forms intact. The problem is that the reducing agents used in those procedures are also metals such as Cr or Sn that makes the study of trace metals impossible. If oxidation procedure is used, both pyritic anorganic forms oxidize almost at the same rate which resulted in hardly any separation. Reported here is a new procedure that oxidizes > 95% of pyritic forms and < 5% of organic forms of heavy metal using a modified hydrogen peroxide solution. The procedure is examined using mixtures of standards and salt marsh sediments. Using this procedure, we prove that rarely any added Cu retained in salt marshes is in organic form, a result has been repeatedly mistakenly reported.
- OSTI ID:
- 598185
- Report Number(s):
- CONF-950980-; TRN: 98:001165-0003
- Resource Relation:
- Conference: 109. international annual meeting and exposition of the Association of Official Analytical Chemists: for analytical science that solves today`s problems and anticipates tomorrow`s needs, Nashville, TN (United States), 17-21 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of 109th AOAC international annual meeting & exposition. Final program; PB: 110 p.
- Country of Publication:
- United States
- Language:
- English
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