258
C. De Stefano· C. Foti . A. Gianguzza . D. Piazzese . S. Sammartano
Table A9.4. Apparent protonation constants' of amino acids in artificial sea water at different salinities,
at t= 25°C
LogrJ:*
5
Glycine
Alanine
Histidine
Glutammic acid Aspartic acid
5
9.58
9.71
9.08
9.67
9.58
2
11.90
12.06
15.03
13.86
13.28
3
16.62
16.00
15.18
15
9.49
9.65
9.00
9.50
9.35
2
11.80
12.00
14.98
13.60
12.96
3
16.61
15.72
14.86
25
1
9.46
9.64
8.96
9.41
9.21
2
11.77
11.99
15.02
13.47
12.80
3
16.69
15.59
14.71
35
9.46
9.64
8.96
9.36
9.12
2
11.76
11.99
15.09
13.40
12.71
3
16.81
15.53
14.63
45
9.46
9.65
8.98
9.32
9.06
2
11.77
11.99
15.19
13.36
12.66
3
16.95
15.51
14.60
a Refer to the reaction: A
Z - + iH+ H H;Az-'.