Table 5.

Free concentrations of various components of synthetic saliva at t = 25 and 37°C, at pH = 6.5 and 7.0.

Component (X)	[X]/mol L−1		pX		%[X](a)
	t = 25°C
	pH = 6.5	pH = 7.0	pH = 6.5	pH = 7.0	pH = 6.5	pH = 7.0
Ca2+	1.499E − 03	1.322E − 03	2.824	2.879	71.4 ± 1.4	63.0 ± 1.8
Mg2+	3.243E − 04	2.757E − 04	3.489	3.560	64.9 ± 1.8	55.1 ± 2.2
Na+	1.952E − 02	1.934E − 02	1.709	1.713	96.2 ± 0.5	95.3 ± 0.5
K+	2.800E − 02	2.784E − 02	1.553	1.555	96.9 ± 0.4	96.3 ± 0.4
NH4 +	3.347E − 03	3.292E − 03	2.475	2.483	95.6 ± 0.4	94.1 ± 0.5
SCN−	1.903E − 03	1.903E − 03	2.720	2.720	97.6 ± 0.6	97.6 ± 0.6
F−	2.401E − 06	2.406E − 06	5.620	5.619	96.0 ± 0.7	96.2 ± 0.6
Cl−	2.460E − 02	2.461E − 02	1.609	1.609	97.2 ± 0.6	97.3 ± 0.6
SO4 2−	8.604E − 04	8.657E − 04	3.065	3.063	78.2 ± 1.0	78.7 ± 1.0
HPO4 2−	1.954E − 03	3.594E − 03	2.709	2.444	23.0 ± 0.7	42.3 ± 0.8
AA	1.288E − 07	4.058E − 07	6.890	6.392	0.0 ± 0.1	0.1 ± 0.1
HCO3 −	7.166E − 03	9.270E − 03	2.145	2.033	62.6 ± 1.0	81.0 ± 0.6
Urea	3.297E − 03	3.298E − 03	2.482	2.482	99.9 ± 0.1	99.9 ± 0.1
	t = 37°C
	pH = 6.5	pH = 7.0	pH = 6.5	pH = 7.0	pH = 6.5	pH = 7.0
Ca2+	1.413E − 03	1.231E − 03	2.850	2.910	67.3 ± 1.5	58.6 ± 1.9
Mg2+	3.161E − 04	2.686E − 04	3.500	3.571	63.2 ± 1.8	53.7 ± 2.2
Na+	1.946E − 02	1.928E − 02	1.711	1.715	95.9 ± 0.4	95.0 ± 0.5
K+	2.794E − 02	2.775E − 02	1.554	1.557	96.7 ± 0.4	96.0 ± 0.4
NH4 +	3.327E − 03	3.251E − 03	2.478	2.488	95.1 ± 0.4	92.9 ± 0.5
SCN−	1.904E − 03	1.904E − 03	2.720	2.720	97.6 ± 0.6	97.6 ± 0.6
F−	2.387E − 06	2.393E − 06	5.622	5.621	95.5 ± 0.8	95.7 ± 0.7
Cl−	2.465E − 02	2.465E − 02	1.608	1.608	97.4 ± 0.5	97.4 ± 0.5
SO4 2−	8.513E − 04	8.575E − 04	3.070	3.067	77.4 ± 1.0	78.0 ± 1.0
HPO4 2−	1.966E − 03	3.541E − 03	2.706	2.451	23.1 ± 0.7	41.7 ± 0.8
AA	2.563E − 07	8.072E − 07	6.591	6.093	0.1 ± 0.1	0.2 ± 0.0
HCO3 −	7.509E − 03	9.417E − 03	2.124	2.026	65.6 ± 0.9	82.2 ± 0.5
Urea	3.297E − 03	3.298E − 03	2.482	2.482	99.9 ± 0.1	99.9 ± 0.1

^(a)±95% confidence interval on the formation percentage.