Millipore Spectroquant Multy Operating Manual page 221

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 volu metric
flask and make up to the mark with distilled water.
The standard solution prepared according to this procedure has
a concentration of 1000 mg/l anionic surfactants.
Further investigational concentrations may be prepared from
this standard solution by diluting accordingly with distilled
water.
Stability:
When stored in a cool place (refrigerator), the standard so-
lution of 1000 mg/l remains stable for one month. The diluted
standard solutions (investigational concentrations) must be
used immediately.
Standard solution of surfactants (cationic)
Preparation of a standard solution:
Dissolve 1.00 g of N-cetyl-N,N,N-trimethylammonium bromide
GR with distilled water in a calibrated or conformity-checked
1000-ml volu metric flask and make up to the mark with
distilled water.
The standard solution prepared according to this procedure has
a concentration of 1000 mg/l cationic surfactants.
Further investigational concentrations may be prepared from
this standard solution by diluting accordingly with distilled
water.
Stability:
When stored in a cool place (refrigerator), the standard so-
lution 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-dodecane-
sulfonate
1.16754.9010 Water for analysis
EMSURE®
Reagents required:
1.02342.0100 N-cetyl-N,N,N-tri-
methylammonium
bromide GR for
analysis
1.16754.9010 Water for analysis
EMSURE®
Chapter 5.2 | Page 21 of 23