Removal of copper and iron prior to water hardness titration

Silica gel was reacted with 3-aminopropyltriethoxysilane or with the N-methyl derivative of the same reagent to produce a material with an amino silyl functional group. If a water sample in the pH range of 5.0 to 7.5 is passed through a short column of this material, iron(II) and copper(II) are comp...

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Bibliographische Detailangaben
Veröffentlicht in:	Anal. Chem.; (United States) 1976-03, Vol.48 (3), p.570-572
Hauptverfasser:	Fritz, James S, King, Jefferey N
Format:	Artikel
Sprache:	eng
Schlagworte:	400105 - Separation Procedures ADSORBENTS ALKALINE EARTH METALS AMINO ACIDS CALCIUM CARBOXYLIC ACIDS CHELATING AGENTS CHROMATOGRAPHY COPPER CYANIDES EDTA ELEMENTS HYDRIDES HYDROGEN COMPOUNDS INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY INTERFERING ELEMENTS ION EXCHANGE CHROMATOGRAPHY IRON MAGNESIUM METALS ORGANIC ACIDS ORGANIC COMPOUNDS ORGANIC POLYMERS OXYGEN COMPOUNDS PETROCHEMICALS PETROLEUM PRODUCTS PH VALUE POLYMERS RESINS SAMPLE PREPARATION SEPARATION PROCESSES SILANES SILICA GEL SILICON COMPOUNDS TRANSITION ELEMENTS WATER
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Beschreibung
Zusammenfassung:	Silica gel was reacted with 3-aminopropyltriethoxysilane or with the N-methyl derivative of the same reagent to produce a material with an amino silyl functional group. If a water sample in the pH range of 5.0 to 7.5 is passed through a short column of this material, iron(II) and copper(II) are completely retained, while calcium(II) and magnesium(II) pass through. This permits an accurate water hardness titration withoug adding any cyanide. (auth)
ISSN:	0003-2700 1520-6882
DOI:	10.1021/ac60367a047