peCHECK, Minerals, Level 2
Code: QX103695

peCHECK, Minerals, Level 2

Previous QMX Code: 140-704-102

peCHECK Minerals, Level 2

peCHECK are cost effective performance evaluation standards for routine analysis compliance testing. Performance evaluation control standard are available for minerals, nutrients, and solids in water and wastewater matrices and are certified through a comprehensive round-robin study providing independent verification from multiple laboratories.

  • Cost effective to allow for an increased monitoring schedule
  • Wide mouth bottles for easy transfer and use – just dilute to volume
  • Each lot manufactured in large volume for long-term use of the same control limits
  • 3 concentration levels available
  • Includes Certificate of Analysis listing Consensus Values, Confidence and Tolerance Intervals, and Instructions for Use - complete documentation for audit purposes

peCHECK  Minerals, Level 2 is a Performance Evaluation Standard for analysis of minerals in drinking and waste water. It is specifically designed for periodic quality control verification and method development for water analyses of the listed parameters. Not intended for calibration.

Expiry: 1 year from date of shipment

peCHECK Performance Evaluation Standards are available for the determination of Nutrients, Solids and Minerals and at 3 different concentration levels.

Unit Size: 1

This Performance Evaluation Standard is supplied in 2 bottles (Alpha and Beta) in the form of a concentrate prepared by weight and does not require digestion. Dilute both bottles to 1L before use.

Typical values:

Parameter Unit Consensus Value Confidence Interval Tolerance Interval
Conductivity @ 25C uS/cm 1526 1515 - 1537 1400 - 1652
Total Hardness (as CaCO3) mg/l 228 226 - 229 210 - 245
Total Dissolved Solids mg/l 1116 1095 - 1137 940 - 1292
Calcium (Ca) mg/l 63.4 62.9 - 63.9 58.2 - 68.6
Potassium (K) mg/l 163 161 - 164 144 - 181
Magnesium (Mg) mg/l 16.5 16.3 - 16.6 14.9 - 18.0
Sodium (Na) mg/l 100 99.4 - 101 93.4 - 107
Chloride (Cl-) mg/l 94.8 94.0 - 95.5 86.1 - 103
Fluoride (F-) mg/l 4.04 3.96 - 4.11 3.34 - 4.74
Sulfate (SO42-) mg/l 150 149 -151 135 - 165

These values were the result of an inter-laboratory study involving 25 international laboratories. Each laboratory was asked to supply analysis data for a specific list of elements. Not all the laboratories supplied data for the different parameters.

Here is a summary of methods used by most of the participating laboratories for the inter-laboratory study:

Ca, K, Mg, Na:   ICP-MS, ICP-OES, AAS, IC (Cations)
Fluoride:   Colorimetric method, IC, ISE
Chloride:   IC, AgNO3 Titration, Mercuric thiocynate method
Sulfate:   IC, ICP, Turbidimetry
TDS:   Gravimetric method
Conductivity:   Conductivity meter
Total Hardness:  Calculated (with ICP for Ca & Mg), EDTA titration

Family
  • Performance Evaluation Standard
Product Type
  • Minerals
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