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EC number: -
CAS number: -
temperatures and the corresponding calibration factors for glass
double-distilled water are shown in the following table:
Literature Value (mN/m)
Calibration Factor (φ)
Mean Calibration Factor = 0.994
The readings, times
and temperatures for the sample solution are shown in the following
Mean reading :
Surface tension :
reading x calibration factor
73.0 x 0.994
21.5 +/- 0.5oC
pH of sample solution :
72.6 mN/m (1.03 x 103g/l
solution) at 21.5 +/- 0.5oC, using a ring method based on ISO
304, Method A5 Surface Tension of Commission Regulation (EC) No 440/2008
of 30 May 2008. The test material is considered not to be a
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