Millipore Spectroquant Multy Operating Manual page 216

Standard solution of monochloramine
Preparation of a standard solution:
Place 5.0 ml of chlorine standard solution 100 mg/l Cl
10.0 ml ammo nium standard solution 10 mg/l NH
calibrated or conformity-checked 100-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 5.00 mg/l Cl
Stability:
The standard solution is not stable and must be used
immediately.
Standard solution of nitrogen (total)
Preparation of a standard solution:
Dissolve 5.36 g of glycine 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 total nitrogen.
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 week. The diluted
standard solutions (investigational concentrations) must be
used immediately.
Standard solution of oxygen scavengers
Preparation of a standard solution:
Dissolve 1.00 g of N,N-diethylhydroxylamine 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 N,N-diethylhydroxylamine
(DEHA).
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 and the diluted standard solutions
(investigational concentrations) remain stable for one day.
and
2
-N in a
4
or 3.63 mg/l NH Cl.
2 2
Reagents required:
Chlor standard solution
100 mg/l Cl
2
Preparation see "Standard solution
of free chlorine" with hypochlorite
solution (standard solution that is
absolutely necessary for the prepa-
ration of the monochloramine
standard)
Ammonium standard solution
10 mg/l NH -N
4
Preparation with Ammonium
standard solution Certipur
Cat. No. 1.19812.0500, 1000 mg/l
NH = 777 mg/l NH -N
4 4
1.16754.9010 Water for analysis
EMSURE®
Reagents required:
1.04201.0100 Glycine GR for
analysis
1.16754.9010 Water for analysis
EMSURE®
Reagents required:
8.18473.0050 N,N-Diethylhydroxyl-
amine for synthesis
1.16754.9010 Water for analysis
EMSURE®
Chapter 5.2 | Page 16 of 23
,
®