Analytical Method: Analytical Quality Assurance, Standard for Cationic Surfactants

Reagents:
Cat.No. 102342  N-Cetyl-N,N,N-trimethylammonium bromide for analysis
Cat.No. 116754  Water for analysis
 
Preparation of a standard solution:
Dissolve 1.00 g of N-cetyl-N,N,N-trimethylammonium bromide for analysis with distilled water in a calibrated or conformity-checked 1000-ml volumetric flask and make up to the mark with distilled water. The stock solution prepared according to this procedure has a concentration of 1000 mg/l cationic surfactants.
 
Further investigational concentrations may be prepared from this stock solution by diluting accordingly.
 
Stability:
When stored in a cool place (refrigerator), the stock solution remains stable for one month. The diluted investigational solutions must be used immediately.

 

For use with test kits:

 

Measuring range
in mg/l

101764

Spectroquant® Surfactants (cation.) Cell Test

0.05 - 1.50 CTAB

 

 

 

 

Materials

     
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