이미지를 클릭하시면 문서를 다운받으실수 있습니다.
Dear NIST Standard Reference Material Customer:
This letter is to notify the users and purchasers of NIST SRM 1650b Diesel Particulate Matter of the revised Certificate of Analysis (COA) dated 07 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
Dear NIST Standard Reference Material Customer:
This letter is to notify the users and purchasers of NIST SRM 1650b Diesel Particulate Matter of the revised Certificate of Analysis (COA) dated 07 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
