EXEMPLE
Reports of Cases Decided in the Supreme Court of the State of South Dakota Volume 3
- Livres de poche2002, ISBN: 9781234238131
Edition reliée
Hoboken, NJ, U.S.A.: John Wiley & Sons, Incorporated, 1981. 348pp. b/w diagrams. Gilt lettering on spine. Small biro line on green hardback covers.. Hard Cover. Very Good/No Jacket… Plus…
Hoboken, NJ, U.S.A.: John Wiley & Sons, Incorporated, 1981. 348pp. b/w diagrams. Gilt lettering on spine. Small biro line on green hardback covers.. Hard Cover. Very Good/No Jacket. 8vo - over 7¾" - 9¾" tall., John Wiley & Sons, Incorporated, 1981, RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 22 pages. Original publisher: Denver, Colo. : U. S. Dept. of the Interior, U. S. Geological Survey, 2002. OCLC Number: (OCoLC)50711009 Subject: Geochemistry -- Laboratory manuals. Excerpt: . . . The acetate anion elutes early during the chromatographic run. The retention time of the anions also seem to differ when large amounts of acetate are present. Therefore, this method is not recommended for leachates of solid samples when acetate is used for pH adjustments. In addition to these problems described by Pfaff and others ( 1991 ), another problem may arise from analysis of a large number of samples of low pH containing Fe and SO. The sulfate may 4 accumulate by adsorption on Fe precipitates, to be released in subsequent elutions, resulting in elevated SO concentrations. This problem can be solved by adding 100 l of concentrated ( 100x ) 4 eluent to 5ml of sample to raise the pH 4. 5. The solution is covered and allowed to sit over night, decanted and filtered through a. 45 m filter prior to running. Interference can also be caused by metal contamination on the columns. This was experienced when running samples containing 500 ppm CuSO4. The problem was not recognized until check standards were run at the end of the job. Washing the columns with 500 ml of. 01M oxalic acid solution followed by 500ml DI water removed the contamination. Scope This method is applicable to the analysis of natural waters and leachate solutions that do not contain acetate. It can be extended to include the analysis of water leachates of solid samples. o Liquid samples should be refrigerated at 4 C and stored no longer than 28 days when sulfate and nitrate are to be analyzed. For fluoride, chloride, and bromide no refrigeration is required. If nitrite and or phosphate are to be analyzed, the samples must be refrigerated and analyzed within 48 hours. In a given sample, the anion that requires the most preservation treatment and the shortest holding time will determine the preservation treatme. . . This item ships from La Vergne,TN., RareBooksClub<
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EXEMPLE
Reports of Cases Decided in the Supreme Court of the State of South Dakota Volume 3
- Livres de poche2002, ISBN: 1234238136
[EAN: 9781234238131], Neubuch, [PU: RareBooksClub], SUBJECTS, This item is printed on demand. Paperback. 22 pages. Original publisher: Denver, Colo. : U. S. Dept. of the Interior, U. S. G… Plus…
[EAN: 9781234238131], Neubuch, [PU: RareBooksClub], SUBJECTS, This item is printed on demand. Paperback. 22 pages. Original publisher: Denver, Colo. : U. S. Dept. of the Interior, U. S. Geological Survey, 2002. OCLC Number: (OCoLC)50711009 Subject: Geochemistry -- Laboratory manuals. Excerpt: . . . The acetate anion elutes early during the chromatographic run. The retention time of the anions also seem to differ when large amounts of acetate are present. Therefore, this method is not recommended for leachates of solid samples when acetate is used for pH adjustments. In addition to these problems described by Pfaff and others ( 1991 ), another problem may arise from analysis of a large number of samples of low pH containing Fe and SO. The sulfate may 4 accumulate by adsorption on Fe precipitates, to be released in subsequent elutions, resulting in elevated SO concentrations. This problem can be solved by adding 100 l of concentrated ( 100x ) 4 eluent to 5ml of sample to raise the pH 4. 5. The solution is covered and allowed to sit over night, decanted and filtered through a. 45 m filter prior to running. Interference can also be caused by metal contamination on the columns. This was experienced when running samples containing 500 ppm CuSO4. The problem was not recognized until check standards were run at the end of the job. Washing the columns with 500 ml of. 01M oxalic acid solution followed by 500ml DI water removed the contamination. Scope This method is applicable to the analysis of natural waters and leachate solutions that do not contain acetate. It can be extended to include the analysis of water leachates of solid samples. o Liquid samples should be refrigerated at 4 C and stored no longer than 28 days when sulfate and nitrate are to be analyzed. For fluoride, chloride, and bromide no refrigeration is required. If nitrite and or phosphate are to be analyzed, the samples must be refrigerated and analyzed within 48 hours. In a given sample, the anion that requires the most preservation treatment and the shortest holding time will determine the preservation treatme. . . This item ships from La Vergne,TN.<
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(*) Livre non disponible signifie que le livre est actuellement pas disponible à l'une des plates-formes associées nous recherche.