Instructions for the Preparation of Standard Solutions
Standard solution of surfactants (anionic)
Preparation of a standard solution:
Dissolve 1.00 g of sodium 1-dodecanesulfonate with distilled water in a
calibrated or conformity-checked 1000-ml volumetric flask and make up
to the mark with distilled water.
The standard solution prepared according to this procedure has a con-
centration of 1000 mg/l anionic surfactants.
Further investigational concentrations may be prepared from this stan-
dard solution by diluting accordingly with distilled water.
Stability:
When stored in a cool place (refrigerator), the standard solution of
1000 mg/l remains stable for one month. The diluted standard solutions
(investigational concentrations) must be used immediately.
Reagents required:
1.12146.0005 Sodium 1-dode-
canesulfonate
1.16754.9010 Water for
analysis
EMSURE
®
Standard solution of surfactants (cationic)
Preparation of a standard solution:
Dissolve 1.00 g of N-cetyl-N,N,N-trimethyl-ammonium bromide GR with
distilled water in a calibrated or conformity-checked 1000-ml volumetric
flask and make up to the mark with distilled water.
The standard solution prepared according to this procedure has a con-
centration of 1000 mg/l cat-ionic surfactants.
Further investigational concentrations may be prepared from this stan-
dard solution by diluting accordingly with distilled water.
Stability:
When stored in a cool place (refrigerator), the standard solution of
1000 mg/l remains stable for one month. The diluted standard solutions
(inves tigational concentrations) must be used immediately.
Reagents required:
1.02342.0100 N-cetyl-N,N,N-
trimethylammo-
nium bromide
GR for analysis
1.16754.9010 Water for
analysis
EMSURE
®
Release 06/2014
Spectroquant
®
photometers NOVA 60 and Pharo photometers
Standard solution of surfactants (nonionic)
Preparation of a standard solution:
Dissolve 1.00 g of Triton
®
X-100 with distilled water in a calibrated or
conformity-checked 1000-ml volumetric flask and make up to the mark
with distilled water.
The standard solution prepared according to this procedure has a con-
centration of 1000 mg/l non-ionic surfactants.
Further investigational concentrations may be prepared from this stan-
dard solution by diluting accordingly with distilled water.
Stability:
When stored in a cool place (refrigerator), the standard solution of
1000 mg/l remains stable for one week. The diluted standard solutions
(inves tigational concentrations) must be used immediately.
Reagents required:
1.12298.0101 Triton
®
X-100
1.16754.9010 Water for
analysis
EMSURE
®
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