30
Nitrogen, Total LR
NITROGEN, TOTAL LOW RANGE
SPECIFICATIONS
Range
0.0 to 25.0 mg/L N
Resolution
0.1 mg/L
Accuracy
±1.0 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source
Tungsten lamp with narrow band interference filter @ 420 nm
Method
Chromotropic acid method. A persulfate digestion converts all forms of nitrogen to
nitrate. Then the reaction between nitrate and the reagents causes a yellow tint in
the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test
Q.ty/set
HI 93767A-B*
Digestion Vial
1 vial
50 vials
DEIONIZED120
Deionized Water
2 mL
1 bottle
PERSULFATE/N
Potassium Persulfate
1 packet
50 packets
BISULFITE/N
Sodium Metabisulfite
1 packet
50 packets
HI 93767-0
Total Nitrogen Reagent
1 packet
50 packets
HI 93766V-0LR**
Reagent Vial
1 vial
50 vials
*
Digestion Vial identification:
N LR
, green label.
**
Reagent Vial identification:
N LR
, red label.
Notes
: Store the unused vials in their container in a cool and dark place.
REAGENT SET
HI 93767A-50
Reagents for up to 49 tests. Contains:
Box 1: HI 93767A-50 Reagent Set
Box 2: HI 93767A&B-50 Reagent Set, for Total Low Range Nitrogen.
For other accessories see page 68.
REQUIRED ACCESSORIES
HI 839800-01
Hanna reactor (115 VAC)
HI 839800-02
Hanna reactor (230 VAC)
HI 740216
Test tube cooling rack (25 holes)
HI 740217
Laboratory bench safety shield
For other accessories see page 68.