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  • ISO
    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
    Edition: 1998
    $254.51
    / user per year

Content Description

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
CationTypical working range with 10 μl loop mg/l1)
Lithium0,01 to 1
Sodium0,1 to 10
Ammonium0,1 to 10
Potassium0,1 to 10
Manganese0,5 to 50
Calcium0,5 to 50
Magnesium0,5 to 50
Strontium0,5 to 50
Barium1 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 μl loopfor lower working ranges.


About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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