RQCHECK TEST KIT FOR RQFLEX/RQFLEX PLUS (C005B-094532)

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. 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

Legal Information

REFLECTOQUANT is a registered trademark of Merck KGaA, Darmstadt, Germany

RQFLEX is a registered trademark of Merck KGaA, Darmstadt, Germany

description: quantitative. Quality Level: 100. specific analyte(s): nitrate. reaction suitability: reaction type: Griess reaction. measuring range: 5-225 . mg/L (NO₃^-). web metadata keyword.default: microbialanalysis
microbialanalysis. compatibility: RQflex^®. 10 Plus, RQflex^®. 10, RQflex^®. 20, for use with REFLECTOQUANT^®. . detection method: reflectometric. storage temp.: 2-8°C. Pictograms: GHS07. Signal Word: Warning. Hazard Statements: H319. Precautionary Statements: P264 - P280 - P305 + P351 + P338 - P337 + P313. Hazard Classifications: Eye Irrit. 2. Storage Class Code: 11 - Combustible Solids. WGK: WGK 2.