Hach-Lange SI794 P User Manual - Manual (Page 106)

106
Buffer tables
-05- NIST standard buffers
NIST Standard (DIN 19266 : 2000-01)
Note:
The actual pH values of the individual batches of the reference materials are
documented in a certificate of an accredited laboratory. This certificate is sup-
plied with the respective buffers. Only these pH(S) values shall be used as
standard values for the secondary reference buffer materials. Correspondingly,
this standard does not include a table with standard pH values for practical
use. The table above only provides examples of pH(PS) values for orientation.