Nitrite
www.chemetrics.com | 1-800-356-3072
Methods Visual Kits
Nitrite, an intermediate in the nitrogen cycle, is
Range: 0-2 ppm as N
formed during the decomposition of organic matter
MDL: 0.25 ppm / Method: Azo Dye Formation
but readily oxidizes to form nitrate. These processes
Cat#
occur in wastewater treatment plants, water distribu-
CHEMets Kit K-7004
tion systems, and natural waters. Nitrites are useful as
CHEMets Refill, 30 ampoules R-7002
corrosion inhibitors, preservatives, pigments, and in
Comparator, Shelf-life 2 years:
0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0 ppm C-7004
manufacturing many organic preservative chemicals.
Kit comes in a plastic case and contains everything needed to perform
A Maximum Contaminant Level of 1 mg/L has been
30 tests: Refill, Comparator, 25 mL sample cup, instructions, and MSDS.
established by the USEPA for nitrite-nitrogen in drink-
ing water.
Range: 0-55 ppm as N
MDL: 8 ppm / Method: Azo Dye Formation
Azo Dye Formation Method
Cat#
Reference: APHA Standard Methods, 20
th.
ed., pp. 4-
VACUettes Kit K-7004D
112, Method 4500-NO
2
¯B (1998). USEPA Methods for
VACUettes Refill, 30 ampoules R-7002D
Chemical Analysis of Water and Wastes, Method 354.1
Comparator, Shelf-life 2 years:
0, 8, 15, 22.5, 30, 37.5, 45, 50, 55 ppm C-7004D
(1983).
Kit comes in a plastic case and contains everything needed to perform
Test kits containing CHEMets
®
, VACUettes
®
, or 30 tests (except distilled water): Refill, Comparator, dilutor snapper cup, micro
test tube, instructions, and MSDS.
Vacu-vials
®
ampoules are based on a colorimetric
chemistry in which nitrite reacts to form a pink azo
dye. The intensity of the color is directly proportional
Range: 0-110 ppm as N
MDL: 15 ppm / Method: Azo Dye Formation
to the concentration of nitrite in the sample. Nitrate
will not interfere. Results are expressed as ppm (mg/L)
Cat#
VACUettes Kit K-7004A
NO
2
-N.
VACUettes Refill, 30 ampoules R-7002A
Comparator, Shelf-life 2 years:
The Ceric Sulfate Titrimetric Method
0, 15, 30, 45, 60, 75, 90, 100, 110 ppm C-7004A
Reference: Developed by CHEMetrics, Inc.
Kit comes in a plastic case and contains everything needed to perform
30 tests (except distilled water): Refill, Comparator, dilutor snapper cup, micro
CHEMetrics’ method is particularly applicable to
test tube, instructions, and MSDS.
systems that contain nitrite corrosion inhibitors in the
presence of glycol. Ceric sulfate is the titrant and
Range: 0-220 ppm as N
ferroin is the end point indicator. The method is free
MDL: 30 ppm / Method: Azo Dye Formation
from glycol interference in samples that contain up
Cat#
to 75% glycol. Results are expressed as ppm (mg/L) VACUettes Kit K-7004B
NaNO
2
. VACUettes Refill, 30 ampoules R-7002B
Comparator, Shelf-life 2 years:
0, 30, 60, 90, 120, 145, 170, 195, 220 ppm C-7004B
Kit comes in a plastic case and contains everything needed to perform
30 tests (except distilled water): Refill, Comparator, dilutor snapper cup, micro
test tube, instructions, and MSDS.
57
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