WI-023C Preparation of Pulverised CRM Jars
How to correctly fill, tamp, and register CRM jars for use as PhotonAssay™ monitoring standards — including when and how to re-jar them.
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What this note covers
Why fill accuracy matters — discrepancies between registered and actual jar mass can bias PhotonAssay™ results, particularly for CRMs run across extended periods
Step-by-step jarring procedure including tamping technique, recommended gross masses, and fill level verification
Safety requirements for working with fine pulverised materials — ventilation, respiratory protection, and PPE
Re-jarring procedure and when to schedule it — including how to monitor jar status via the Customer Daily Report
CRM jar registration in the PhotonAssay™ OperatorUI and contamination prevention between materials
