Environmental testing laboratories face increasingly stringent regulatory requirements where accuracy is non-negotiable. When your continuing calibration verification (CCV) drifts outside ±10%, regulators can reject entire data packages, and clients lose confidence. Certified reference materials (CRMs) are your foundation for defensible data, but only when properly matched to your matrix, method, and target analytes.
This comprehensive guide covers everything you need to know about selecting and using CRMs for heavy metals analysis, including regulatory requirements, selection criteria, element-specific recommendations, validation protocols, and practical ordering considerations.