GB
Methods
Pre-Concentration
Pre-concentration uses exactly the same procedure as interference removal, except a
greater volume of sample is used in step 1, instead of deionised/tap water.
For calculation of the original sample concentration a concentration factor should be
considered:
If a 50 ml sample is used the concentration factor is 20/50 = 0.4
If a 100 ml sample is used the concentration factor is 20/100 = 0.2
This can be extended as required in order to concentrate the polyacrylate/polymer suf-
ficiently for analysis.
Example:
If the reading is 20 mg/l and 50 ml are taken for pre-concentration the original concentra-
tion should be calculated as
20
*
0.4 = 8 mg/l.
Note:
Samples exceeding 10,000 TDS should be diluted prior to loading onto the cartridge. Take
this dilution into consideration when working out the overall concentration factor.
Reagent / Accessories Form of reagent/Quantity Order-No.
KS255 (Polyacrylate reagent 1)
KS256 (Polyacrylate reagent 2)
KS336 (Propan-2-ol)
C18-cartridge
KS173 (2,4 Dinitrophenol)
KS183 (Nitric Acid)
Liquid reagent / 65 ml
Liquid reagent / 65 ml
Liquid reagent / 65 ml
Liquid reagent / 65 ml
Liquid reagent / 65 ml
56L025565
56L025665
56L033665
AS-K22811-KW
56L017365
56L018365
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