The GC-FID system was performed an Agilent 6890 N
Network GC equipped with a flame ionization detector,
Agilent 7683 series autosampler, Agilent chemstation and
HP-5 column with 0.25 m film thickness (30 m x 0.320
mm I.D.). Injection and detector temperature is 250 and
300 C, respectively. 2 µl was injected in splitless mode.
The carry gas (N2) flow-rate was kept constant during the
run at 2 ml min-1
. Nitrogen (30 ml min-1
), hydrogen (44 ml
min-1
) and synthetic air (400 ml min-1
) were used as
auxiliary gases for the flame ionization detector
. After injection of the sample at inlet temperature 250 C, the temperature of the GC oven
was as follows: initial temperature was 150 C, held for 1.5 min, increased to 260 C at a rate of 50 C min-1
held for 5 min, and finally to
270 C at a rate of 10 C min-1
and held for 3.3 min. Detector temperature is 300 C. 2 µl was injected in splitless mode. Calibration
curves were linear between the concentration range 0.25-50 g ml-1
. The method was validated for specificity, linearity, precision,
accuracy and limit of quantitation. Also, the method was applied to directly and easily to the analysis of the pharmaceutical preparation
(Estrofem tablet).
Keywords: 17 -estradiol, GC-FID, Pharmaceutical preparation