Appendix

Table 1: Results of Analyses by Various Procedures
Detergent Mod. Titrimetric Procedure
(% P2O5)
Aut. Color. on Titration Solution
(% P2O5)
ASTM Procedure as written
(% P2O5)
Results Mean Results Mean Results Mean
A 3.48 3.33 3.14 3.16 3.56 3.71
3.18
3.26 3.20 3.71
3.20
3.22 3.10 3.68
3.18
3.36 3.14 3.87
3.14
B 4.51 4.52 4.60 4.53 5.10 5.04
4.56
4.40 4.50 4.94
4.50
4.61 4.54 5.23
4.58
4.57 4.54 4.82
4.46
C 4.73 4.59 4.58 4.51 4.74 5.08
4.62
4.51 4.42 5.32
4.46
4.62 4.50 5.22
4.50
4.50 4.46 5.04
4.54
D 3.56 3.70 3.60 3.61 4.21 4.25
3.60
3.64 3.54 4.42
3.66
3.80 3.58 3.74
3.62
3.80 3.62 4.61
3.66
E 4.34 4.39 4.40 4.40 5.12 5.22
4.40
4.48 4.40 4.86
4.40
4.38 4.34 5.28
4.34
4.36 4.44 5.63
4.46
F 3.92 4.02 3.88 3.90 4.11 4.39
3.76
4.15 3.96 4.61
3.86
3.95 3.92 4.39
3.86
4.05 4.00 4.43
3.96
G 3.59 3.70 3.54 3.56 3.95 4.04
3.40
3.82 3.70 4.19
3.60
3.72 3.50 4.06
3.40
3.67 3.74 3.96
3.60
H 4.68 4.71 4.44 4.52 5.08 5.28
4.44
4.75 4.70 5.44
4.60
4.70 4.58 5.23
4.52
4.70 4.44 5.36
4.44
I 4.44 4.43 4.25 4.32 5.05 5.03
4.20

4.53
4.40 4.87
4.44
4.61 4.40 5.10
4.44
4.54 4.25 5.10
4.20
Mean 4.16 4.06 4.67
The pH-titration curves of KH2PO4 solution titrated with NaOH solution alone and in the presence of NaCl at three concentrations.
Titration curve for detergent A
Titration curve for detergent B
Titration curve for detergent C
Titration curve for detergent D
Titration curve for a phosphate standard solution, analysed by the new procedure
pH variation curve for a phosphate standard solution with NaOH 0.25N solution added in 0.25 ml increments
pH variation curve for a detergent E solution with NaOH 0.25N solution added in 0.25 ml increments
Manifold of the automated molybdenum-blue colorimetric method

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