1 - Scheme Overview

Assessment of accuracy – quantitative methods

Participating labs can choose to be assessed for all the analytes of this scheme, or simply a subset of analytes of interest.

2 - Assessment Frequency

Number of surveys per year: 11
Number of control samples per survey: 1 or 2
Number of samples per year: 15

The scheme includes 16 analytes. Each analyte is controled between 6 and 15 times a year.

3 - List of Analytes Assessed 

• Uric acid
• β2 microglobulin*
• Calcium
• Chlorides
• Creatinine
• Specific Gravity*
• Glucose
• Magnesium
• Microalbumin
• Osmolality
• Phosphates
• pH*
• Potassium
• Total Proteins
• Sodium
• Urea

4 - Description of the Control Samples

Lyophilized human control urines (samples to be resuspended in 5 mL of distilled water).