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Dear NIST Standard Reference Material Customer:
This letter is to notify the users and purchasers of NIST SRM 2975 Diesel Particulate Matter (Industrial Forklift) of the revised Certificate of Analysis (COA) dated 02 July 2021. This revision includes the following changes:- updated expiration date
- changed nitro-PAHs certified values to non-certified values due to incomplete stability testing from lack of appropriate purity assessed calibrants
- converted all other measurands previously labeled as reference or information values to non-certified values
- editorial changesDear NIST Standard Reference Material Customer:
This letter is to notify the users and purchasers of NIST SRM 2975 Diesel Particulate Matter (Industrial Forklift) of the revised Certificate of Analysis (COA) dated 02 July 2021. This revision includes the following changes:- updated expiration date
- changed nitro-PAHs certified values to non-certified values due to incomplete stability testing from lack of appropriate purity assessed calibrants
- converted all other measurands previously labeled as reference or information values to non-certified values
- editorial changes
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