October 14, 2002 MaxChelator Newsletter

Problems with Constants Part II [see mcn072802.htm first]

It turns out, thanks to Dr. Karlene Gunter of Rochester, that BOTH types of constants can be found in Martell & Smith and in the NIST database. Here was the figure from the last newsletter.

In Martell & Smith and in NIST 2nd metal constants are described in one of TWO ways:

M&S
NIST
above figure
MHL/ML.H
[MHL]/[ML][H]
MS
MHL/M.HL
[MHL]/[M][HL]
MHL

Note that in M&S that period can be very hard to see, which is probably what fooled me all these years

Switching to the log form, the equation again is MHL = MS + ML - H1

The problem was that in the last correction, I falsely assumed that ALL the 2nd metal constants were in the first form, when in fact there were some in the second form. Here is the link to the latest contants which contain two files of constants in two formats:

Standard Set [most common chelators and metals] in TCM and CCM formats
Extended Set [additional metals often asked for] in TCM and CCM formats

I am now labeling the constants files starting with CMC for chelator-metal-constants and then the next 4 characters will say the month and year of release. Finally an "S" or "E" for which set. So the above mentioned constants will be CMC1002S.TCM, CMC1002S.CCM, CMC1002E.TCM and CMC1002E.CCM

I will be working on new version of Winmaxc that uses a new file format to better keep track of all of these differences in constants. IN the mean time I will attempt to keep the constants files up to date and have included "Chelator Axioms" on the opening window of the windows and web programs [sorry DOS users].