D 664 – 07
SUMMARY OF CHANGES
Subcommittee D02.06 has identified the location of selected changes to this standard since the last issue
(D 664–06ae1) that may impact the use of this standard. (Approved July 1, 2007.)
(1) Added Note 3 stating a few laboratories observed discrepancies
in results between aqueous and nonaqueous buffers.
Subcommittee D02.06 has identified the location of selected changes to this standard since the last issue
(D 664–06) that may impact the use of this standard. (Approved Nov. 1, 2006.)
(1) Clarified requirement for purity of water in 7.2.
Subcommittee D02.06 has identified the location of selected changes to this standard since the last issue
(D 664–04e1) that may impact the use of this standard. (Approved Jan. 1, 2006.)
(1) Added Appendix X1 to provide a possible procedure for
checking the electrode performance.