TITLE:
The Study of a Simple Pine-Oil Based Laboratory Prepared and Commercial Detergents Using Conductivity Measurements
AUTHORS:
Mosotho J. George, Ts’ukulu Motsamai
KEYWORDS:
Detergent, Pine Gel, Critical Micelle Concentration, Conductivity, Ionic Strength, Small-Scale Manufacturer
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.6 No.12,
November
19,
2015
ABSTRACT: Detergents
are very important substances in everyday life as they are used in laundry
services. This manuscript reports the study of the commercial and laboratory
prepared pine oil-based detergents employing the critical micelle concentration
(CMC) phenomenon using conductivity measurements. The two samples showed the
CMC values of 0.0725 g/cm3 and 0.0920 g/cm3 for
laboratory and commercial samples respectively. The effect of ionic strength
was investigated using NaCl and it demonstrated a drop of
CMC value of about CMC by 40% (laboratory sample) and 70% (commercial sample)
while the equi-molar naphthalene increased the CMC values by about 50%
(laboratory sample) and 12% (commercial sample) relative to their corresponding
values under distilled water. The combined
effect of equi-molar NaCl and naphthalene lowered the CMC by 5% (laboratory sample)
and 30% (commercial sample). These
differences could signify the superiority of the laboratory sample in that it is
somehow buffered against drastic changes in the CMC under different conditions.
The relationship between conductivity and the CMC values does not show
sufficient linearity (R2