Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 300 (1980), S. 121-123 
    ISSN: 1618-2650
    Keywords: Abtrenn. von Antimon, Schwermetallen aus Wasser ; lonenaustausch ; Celluloseaustauscher mit Pyrogallol als Ankergruppe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Eigenschaften eines Celluloseaustauschers mit Pyrogallol als Ankergruppe werden beschrieben. Der Austauscher eignet sich für die Trennung von Sb(III) und Sb(V). Verteilungskoeffizienten für Cu2+, Fe3+, Sb3+, UO 2 2+ , und Zn2+ als Funktion des pH-Wertes in Abwesenheit und in Anwesenheit von 0,5 M NaCl werden angegeben. Der Austauscher eignet sich auch für die Abtrennung anderer Schwermetallionen (Cr3+, Cu2+, Fe3+, Ni2+, Pb2+, UO 2 2+ , Zn2+) aus Wasser. Dies wird durch die Analyse von Leitungswasser belegt.
    Notes: Summary The properties of a cellulose exchanger containing pyrogallol as anchor group are described. This exchanger permits separation of Sb(III) and Sb(V). Distribution coefficients for Cu2+, Fe3+, Sb3+, UO 2 2+ and Zn2+ as function of pH in absence and in presence of 0.5 M NaCl are given. The exchanger can also be used for separation of other heavy metal ions (Cr3+, Cu2+, Fe3+, Ni2+, Pb2+, UO 2 2+ , Zn2+) from water. This is checked by the analysis of tap water.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 0749-1581
    Keywords: Humic substances ; Quantification ; 13C NMR ; DEPT ; SEMUT-90 ; J-resolved ; Volume integration ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Partial structures of a reference groundwater humic substance were quantified by J-resolved two-dimensional 13C NMR spectroscopy applied in its phase-sensitive variant. The results agree with those obtained by the one-dimensional techniques DEPT (distortionless enhancement by polarization transfer) and SEMUT-90 (subspectral editing using a multiple quantum trap), thus demonstrating the accuracy of both methods. However, the two-dimensional technique is recommended, because quantification is based on only one spectrum. Quantification provides the ratio of different substructures (carbons belonging to ketones, carboxylic acids, different aromatics, carbohydrates, paraffinic C, CH, CH2 and CH3 groups) and, in combination with elemental analysis, the partition of hydrogen between C and O (83% bonded to C and 17% to O). Also, insight is obtained into the biogenesis of the humic acids. Aromatic moieties probably originate mainly from lignin rather than from other aromatic compounds. CH—O moieties mainly belong to carbons in ethers and alcohols and only to a small extent to carbons in carbohydrates, as shown by comparing NMR results with gas chromatographic analysis of the carbohydrate part performed by other workers. The ratio of paraffinic CH:CH2:CH3 is about 1:1:1; the high proportion of paraffinic methyl groups cannot yet be explained.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...