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"Telah dilakukan penelitian penetapan kadar deksametason dalam sediaan tablet campuran dengan CTM secara spektrofotometri dengan pereaksi INH dan secara spektrofotodensitometri.Pada penetapan kadar deksametason secara spektrofotometridengan pereaksi INH, terjadi reaksi antara deksametason denganINH menghasilkan senyawa hidrazon yang berwarna kuning senyawainilah yang diukur secara spektrof otometri., Sedangkan padaspek.trofotodensitometri deksametason pada lempeng KLT pada daerahpanjang gelombang ultra violet memberikan fluoresensi, hasilfluoresensi inilah yang diukur secara spektrofotodensitometri.Hasil penelitian menunjukkan bahwa kedua metode penetapan kadar deksametason tersebutmemberikan hasil yang cukup baik dan reprodusibel dan tidak- memberikan perbedaan yang bermakna secara statistik.

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A study on quantitative assay of dexamethasone in tablet

mixed with CTM spectrbfotometrically with INK as reagent and

with spectrofotodensitometry had been done.

On quantitative assay of dexamethasone spectrofotometrically with INH as reagent, there occurs a reaction between dexamethasone with INH producing hydrazone, yellow in color,

this compound is measured spectrofotometrically. While on

spectrofotodensitometry dexamethasone on. TLC sheet at ultra

violet region gives fluorescence, this fluorescence is mea

sured spectrofotodensitometry..

The result of the study, showed that the two method of

quantitative assay of dexamethasone, gave quite good result

and reproducible and did not give difference significantlystatistically."

"The determination of triprolidine hydrochloride and pseudoephedrine hydrochloride in anti influenza tablet has been performed using derivative spectrophotometry method. Triprolidine hydrochloride and pseudoephedrine hydrochloride were determined by measuring the first derivative ratio amplitudes, at 227,6 nm (zero crossing for pseudoephedrine hydrochloride) and at 230,0 nm (zero crossing for triprolidine hydrochloride) respectively. The linear calibration graphs were obtained for 5-50 ppm of triprolidine hydrochloride and for 100-800 ppm of pseudoephedrine hydrochloride. The results showed that the method is rapid, simple and can be applied successfully to assay simultaneously of two components in tablet preparation."

"Hidrokortison asetat dan kloramfenikol merupakan zat aktif yang banyak digunakan dalam sediaan krim sebagai anti infeksi kulit yang disertai peradangan. Untuk menjamin mutu dari suatu sediaan diperlukan metode anal isis yang mempunyai akurasi dan 'presisi yang tinggi, namun jika memungkinkan mudah dan murah di dalam pelaksanaannya. Salah satu metode analisis yang dapat digunakan adalah spektrofotomeri derivatif, melalui pengukuran serapan masing-masing komponen pada panjang gelombang zero crossing komponen lainnya yang terdapat dalam campuran. Penelitian ini bertujuan untuk mendapatkan metode penetapan kadar hidrokortison asetat, kloramfenikol dan campuran keduanya dalam sediaan krim dengan adanya pengawet nipagin secara spektrofotometri derivatif dan menguji validitasnya. Pad a sediaan campuran hidrokortison asetat dan kloramfenikol, masing-masing zat diukur serapannya pad a panjang gelombang 276,8 nm dan 286,0 nm (derivat pertama); sediaan tunggal hidrokortison asetat yang mengandung pengawet nipagin, diukur pada panjang gelombang 257,0 nm (derivat pertama) dan sediaan tunggal kloramfenikol yang mengandung pengawet nipagin diukur pada panjang gelombang 294,6 nm ( derivat pertama ). Dari hasil uji perolehan kembali, metode spektrofotometri derivatif dapat digunakan untuk menetapkan kadar kloramfenikol dalam sediaan krim simulasi yang mengandung hidrokortison asetat, namun metode ini tidak dapat digunakan untuk menetapkan kadar hidrokortison asetat dalam krim simulasi. Metode ini juga dapat digunakan untuk menetapkan kadar hidrokortison asetat dalam sediaan krim simulasi dan merek dagang yang mengandung nipagin dan menetapkan kadar kloramfenikol dalam sediaan krim simulasi yang mengandung pengawet nipagin.

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Hydrocortisone acetate and chloramphenicol are active ingredients mostly used in cream as local anti-infection and anti-inflamatory. The analytical method with high aqquracy and precision is needed to guarantee the quality, but if possible, it is low cost and easily implemented. One of the analytical method can be used is derivative spectrophotometry, by determining each compound at zero crossing wavelength of another compound in mixture. The purpose of this research is to find a new method to determine the concentration of hydrocortisone acetate, chloramphenicol and both of them in cream which contains nipagin as preservative by using derivative spectrophotometry and to examine the validity. In the mixture containing hydrocortisone acetate and chloramphenicol, each compound is determined at 276.8 nm and 286.0 nm (first derivative), In the mixture containing hydrocortisone acetate with nipagin as preservative, this compound is determined at 257.0 nm (first derivative), In the mixture containing chloramphenicol with nipagin as preservative, this compound is determined at 294.6 nm (first derivative). The result of recovery test shows that derivative spectrophotometry method can be used to determining chloramphenicol in cream simulation with hydrocortisone acetate, but can not be used in determining hydrocortisone acetate in this simulation cream with chloramphenicol. This method can also be used for determining the concentration hydrocortisone acetate in simulation cream with nipagin as preservative and market product and also determining chloramphenicol in simulation cream with nipagin as preservative."