The known interfering substances are indicated in the table shown below. In the case of complex samples, such as foods, it is particularly difficult to estimate the potential influence of the foreign substances on the analysis (matrix effect). Please refer to the links below for more details on identifying matrix effects.
1.16971
Nitrate Test Strips, reflectometric
5-225 mg/L (NO₃⁻), REFLECTOQUANT®, for use with RQflex® 20
Synonym(s):
Nitrate chemical test strips, Nitrate test strip for instrument reader
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50 TESTS
$121.00
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50 TESTS
$121.00
About This Item
UNSPSC Code:
41116116
NACRES:
NA.24
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Product Name
Nitrate Test, reflectometric, 5-225 mg/L (NO3-), for use with REFLECTOQUANT®
description
quantitative
Quality Level
specific analyte(s)
nitrate
reaction suitability
reaction type: Griess reaction
measuring range
5-225 mg/L (NO3-)
compatibility
RQflex® 20
for use with REFLECTOQUANT®
detection method
reflectometric
storage temp.
2-8°C
General description
Method: reflectometric with test strips 5 - 225 mg/l NO₃⁻ Reflectoquant®
The Reflectoquant Nitrate test strips can be used for the rapid determination of the nitrate content in water and also with fruit and vegetables to help decide whether a given delivery batch can be released for use in a specific product (e.g. baby foods). On the strip nitrate ions are reduced to nitrite ions by a reducing agent. In the presence of an acidic buffer, these nitrite ions react with an aromatic amine to form a diazonium salt, which in turn reacts with N-(1naphthyl)-ethylene-diamine to form a red-violet azo dye that is determined reflectometrically on the RQflex® 20. For pre-testing a sample in an economic and quick way to check for nitrite interferences or to estimate the nitrate concentration and a possible dilution factor prior to using this quantitative method we recommend our semi-quantitative MQuant test strips for nitrate and nitrite. Further quantitative determination methods can be found with our Spectroquant tests.
Linkage
Replaces: 16971; 16971-1
Analysis Note
function control: conforms
Assay
- standard 1:
22 - 28 mg/l
- standard 2: 90 - 110 mg/l
- standard 3: 180 - 220 mg/l
Assay
- standard 1:
22 - 28 mg/l
- standard 2: 90 - 110 mg/l
- standard 3: 180 - 220 mg/l
Legal Information
REFLECTOQUANT is a registered trademark of Merck KGaA, Darmstadt, Germany
RQFLEX is a registered trademark of Merck KGaA, Darmstadt, Germany
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Warning
hcodes
Hazard Classifications
Eye Irrit. 2
Storage Class
11 - Combustible Solids
wgk_germany
WGK 2
Certificates of Analysis (COA)
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Hello. We use your Nitrate test strips to measure Nitrate levels in whey 0- 500ppm. Can you tell me if there are any interfering substances that you know of that might give a false high reading.
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