Simple Nutrients in Seawater, Whole Volume, WP Proficiency Testing Material, MilliporeSigma™ Supelco™

Description

This proficiency testing sample is produced in accordance with ISO/IEC 17043:2010. All information regarding the use of this material can be found in the reporting packet supplied for each sample.

If a solution is not to be analyzed within two days after opening, preserve a sample aliquot with 0.2 mL of concentrated sulfuric acid per 100 mL of sample (pH<2) and store at 4°C until just before analysis. Analyze the preserved sample as soon as possible within the maximum 28-day holding time. NOTE: The acidification of the sample could result in the oxidation of Nitrite, so it is recommended that 100 mL is separated and not preserved if unable to test for nitrite immediately. Sample preparation: The sample is ready for immediate analysis.

Specifications

• Quantity: 500 mL
• Concentration or Composition (by Analyte or Components): Ammonia as N 0.650 - 19.0 mg/L; Nitrate as N 0.250 - 40.0 mg/L; Nitrate+nitrite as N 0.250 - 40.0 mg/L; Nitrite as N 0.400 - 4.00 mg/L; Orthophosphate as P 0.500 - 5.50 mg/L