ASTM UOP 959 : 1998
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Ammonium Determination in Aqueous Solutions by Ion Chromatography
Hardcopy , PDF
09-05-2013
English
25-07-2002
Important note : Users cannot be edited or removed once added to your Multi user PDF.Describes the concentration of ammonium ion in aqueous solutions by Ion Chromatography (IC).
| DocumentType |
Standard
|
| Pages |
8
|
| PublisherName |
American Society for Testing and Materials
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| Status |
Withdrawn
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| SupersededBy |
This method is for determining the concentration of ammonium ion in aqueous solutions by Ion Chromatography (IC). The limit of quantitation of the method is 0.0001 mass-% (1 mass-ppm). Sodium and potassium interfere with the analysis when they are present at concentrations greater than 0.1 mass-%. Acidic samples that contain greater than 50-mM hydronium ion concentration (pH less than 1.3) deteriorate the performance of the analysis (through loss of resolution). Organic contamination should also be kept to a minimum (to lengthen column life). Sample matrix effects can be avoided or minimized by sample dilution, but only at the expense of the analysis limit of quantitation. When used in conjunction with UOP Method 958 (an extraction procedure), ammonia can also be determined in hydrocarbon samples.
| ASTM UOP 958 : 1998 | Ammonia in Hydrocarbons |
| ASTM UOP 958 : 1998 | Ammonia in Hydrocarbons |
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