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ISO 14911:1998
M00008921
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ISO 14911:1998 Water quality - Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography - Method for water and waste water
standard by International Organization for Standardization, 10/01/1998
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This International Standard specifies a method for the determination of the dissolved cations Li+, Na+ NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ in water (e.g. drinking water, surface water, waste water).
An appropriate pretreatment of the sample (e.g. dilution) and the application of a conductivity detector (CD) make the working ranges given in table 1 feasible.
The applicability of the method for waste water samples should be proved in each case.
| Table 1 - Working ranges of the analytical method | |
|---|---|
| Cation | Typical working range with 10 l loop mg/l1) |
| Lithium | 0,01 to 1 |
| Sodium | 0,1 to 10 |
| Ammonium | 0,1 to 10 |
| Potassium | 0,1 to 10 |
| Manganese | 0,5 to 50 |
| Calcium | 0,5 to 50 |
| Magnesium | 0,5 to 50 |
| Strontium | 0,5 to 50 |
| Barium | 1 to 100 |
| 1) The working range is limited by the ion-exchange capacity of the separator column.If necessary, the sample shall be diluted to meet the working range, or use a 100 l loopfor lower working ranges. | |