Laboratory Manager · Analytical Chemist · ISO/IEC 17025
Sousse, Tunisia
Every file uses fictional data. There is no employer, client or proprietary information, and standards are cited, not copied.
Bottom-up GUM / EURACHEM estimate for a spectrophotometric method: calibration-line u(x₀), reference standard, glassware, precision, recovery significance test, contribution chart.
Download the workbook →The same calculation explained step by step, including what the budget tells a lab manager about where to invest improvement effort.
Read the example →Linearity and residuals, LOD/LOQ, repeatability and intermediate precision by ANOVA, CRM bias test, spike recovery, and a PASS/FAIL summary against pre-set criteria.
Download the workbook →The skeleton I use to write test methods that analysts can follow and assessors can audit, from sample receipt to report.
Read the guide →Example output from the uncertainty workbook
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