Determination of Glycerin from a Marketed Personal Care Product Using Gas Chromatography

Table 3

Recovery study.

% of nominal value	Estimated; concentration of final solution in mL/100 mL^*	Estimated recovery; %	Actual concentration of final solution (mg/mL)^*	Average assay^*; (mL/100 mL)	Actual; recovery; %	Accuracy; %	%RSD
100	9.62	—	4.89	9.62	—	—	0.01
80	8.08	83.99	4.10	8.07	83.88	99.91	0.67
110	10.48	108.94	5.37	10.57	109.87	100.80
120	11.35	117.98	5.78	11.38	118.29	100.20

Average from three replicate injections from sample preparations.
The recovery study is carried out over three-concentration range.