Diluted, Certified Standard Solutions (CRM)
for Water and Wastewater Analysis

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No Dilution. No Doubts. No Delays. Just Precision.

Experience absolute precision with our ready-to-use diluted certified reference materials (CRMs). They are perfect for quality control for photometric methods, standards and our Spectroquant® test kits. But also for TOC analyzers, ICP-OES or Ion chromatography.

The CRMs are directly traceable to NIST primary reference materials, and offer an expanded measurement uncertainty information for every concentration. Whether you’re analyzing drinking water, process water or wastewater, you’ll have no doubts, no dilution, and no delays. Open a bottle of our certified reference materials and experience the highest standard in precision. More details

Feature and Benefits

Extended Portfolio

Complete parameters for quality control in photometric analysis of wastewater, drinking water and process water.

Traceable to Primary Standard Reference Materials from NIST

Quality control results are correct and comparable worldwide

Compatible With All
Photometric Rapid Tests

Merck's Spectroquant® test kits or those from other suppliers.
Test Kits and Photometric Methods

Certificate of Analysis (COA)

Includes batch-specific parameters, exact concentration, expanded measurement uncertainty, and more.
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Ready-to-Use

Diluted certified reference materials with exact concentrations save time and prevent dilution errors.

Perfect Combination With Spectroquant® Prove

New class of spectrophotometers for simple, secure and robust water analysis. Just Prove It.
Learn more about Spectroquant® Prove

Ideal for Validating International Norm Methods

ISO, EN, APHA, and EPA.

Conversion Table

Conversion tables for different parameters.
Download here

Guideline to Calculate your Working Tolerance

According to ISO 17025 every lab needs to calculate their working tolerance. Here is a hint for this procedure.


Ordering Information

Discover our complete range of certified standard solutions or select from the parameters below.

Certified Standard solutions (CRM) for Wastewater Analysis
Certified Standard Solutions
for Wastewater Analysis

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Certified Standard solutions (CRM) for Drinking Water Analysis
Certified Standard Solutions
for Drinking Water Analysis

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Certified Standard Solutions (CRM) for Process Water Analysis
Certified Standard Solutions
for Process Water Analysis

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