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ASTM D6919-03

Historical Revision

Standard Test Method for Determination of Dissolved Alkali and Alkaline Earth Cations and Ammonium in Water and Wastewater by Ion Chromatography

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1.1 This test method is valid for the simultaneous determination of the inorganic alkali and alkaline earth cations, lithium, sodium, potassium, magnesium, and calcium, as well as the ammonium cation in reagent water, drinking water, and wastewaters by suppressed and nonsuppressed ion chromatography.

1.2 The anticipated range of the method is 0.05-200 mg/L. The specific concentration ranges tested for this method for each cation were as follows (measured in mg/L):

Lithium0.4-10.0
Sodium4.0-40.0
Ammonium0.4-10.0
Potassium1.2-20.0
Magnesium2.4-20.0
Calcium4.0-40.0

1.2.1 The upper limits may be extended by appropriate dilution or by the use of a smaller injection volume. In some cases, using a larger injection loop may extend the lower limits.

1.3 It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For hazards statements specific to this test method, see 8.3.


This method is applicable to the simultaneous determination of dissolved alkali and alkaline earth cations and ammonium in water and wastewaters. Alkali and alkaline earth cations are traditionally determined by using spectroscopic techniques, such as AAS or ICP; whereas ammonium can be measured by using a variety of wet chemical methods, including colorimetry, ammonia-selective electrode, and titrimetry. However, ion chromatography provides a relatively straightforward method for the simultaneous determination of cations, such as lithium, sodium, potassium, calcium, magnesium, and ammonium, in fewer than 2030 min.

SDO ASTM: ASTM International
Document Number D6919
Publication Date Aug. 10, 2003
Language en - English
Page Count 9
Revision Level 03
Supercedes
Committee D19.05
Publish Date Document Id Type View
June 1, 2017 D6919-17 Revision
May 15, 2009 D6919-09 Revision
Aug. 10, 2003 D6919-03 Revision