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"Instrumental thin-layer chromatography delivers comprehensive coverage of this separation tool with particular emphasis on how this tool can be used in advanced laboratories and integrated into problem-solving scenarios. Significant improvements in instrumentation have outpaced the development of information resources that describe the latest state-of-the-art and demonstrate the full capabilities of TLC. This book provides a contemporary picture of the fundamentals and practical applications of TLC at a level suitable for the needs of professional scientists with interests in project management where TLC is a common tool. Compact, highly focused chapters convey essential information that defines modern TLC and how it can be effectively implemented in most areas of laboratory science. Numerous figures and tables provide access to material not normally found in a single source yet are required by working scientists."

"Sibutramin Hidroklorida merupakan salah satu obat antiobesitas yang paling sering dicampurkan yang ditemukan di formulasi pelangsing herbal. Sibutramin HCl diindikasikan untuk membantu menurunkan dan pemeliharaan berat badan, selain itu obat ini dapat meningkatkan faktor masalah kardiovaskular, seperti hiperlipidemia dan kontrol glikemi pada pasien diabetes tipe 2. Penelitian ini bertujuan untuk melakukan analisis sibutramin HCl pada produk pelangsing herbal secara Kromatografi Lapis Tipis Densitometri. Digunakan pelarut metanol, panjang gelombang analisis pada 227 nm, dan eluen terpilihnya yaitu toluen-dietilamin (10:0,3) pada Rf 0,58. Hasil dari validasi metode analisis didapat koefisien korelasi kurva kalibrasi (r = 0,9993) berada pada rentang konsentrasi 250,2-2502,0 µg/ml, memiliki nilai batas deteksi 108,74 µg/ml dan batas kuantitasi 362,47 µg/ml. Nilai koefisien variasi pada tiga konsentrasi berbeda antara lain 1,46 %, 1,42 %, dan 1,03 %. Nilai rata-rata uji perolehan kembali pada tiga konsentrasi berbeda antara lain 99,57 %, 100,32 %, dan 99,20 %. Hasil validasi metode memenuhi kriteria yang ditetapkan. Dari tujuh sampel yang dianalisis, enam diantaranya positif mengandung sibutramin HCl. Analisis menunjukkan bahwa jumlah sibutramin HCl yang ditentukan secara KLT-Densitometri bervariasi antara 3-26 mg per satu dosis pemakaian.

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Sibutramine Hydrochloride is one of the anti-obesity drug most commonly found in herbal slimming formulations. Sibutramine HCl is indicated to help lower and weight maintenance, other than that these drugs may increase the factor of cardiovascular problems, such as hyperlipidemia and control glikemi in patients with diabetes type 2. This study aims to analyze sibutramine HCl in herbal slimming products by Thin Layer Chromatography Densitometry. The TLC system was methanol as solvent, the analytical wavelength 227 nm, and eluent is toluene-diethylamine (10:0,3) at Rf 0,58. The results from the validation, calibration curve correlation coefficient (r = 0,9993) concentrations were in the range from 250,2 to 2502,0 µg/ml, limit of detection 108,74 µg/ml and the limit of quantitation 362,47 µg/ml. Result from coefficient of variation at three different concentrations were 1,46 %, 1,42 %, and 1,03 %. The average of percent recovery tests at three different concentrations were 99,57 %, 100,32 %, and 99,20 %. The validation result comply the specified criteria. From seven of the samples analyzed, six of them tested positive for Sibutramin HCl. Analysis indicated that the amount of sibutramine HCl content determined by TLC-Densitometric varied from 3 to 26 mg per one single dosage."

"N-Asetilglukosamin GlcNAc merupakan suatu monosakarida derivat glukosa yang banyak terdapat di alam. Senyawa GlcNAc telah dimanfaatkan secara luas dalam bidang farmasi, pangan serta kosmetik, oleh sebab itu dibutuhkan suatu metode analisis optimum sebagai acuan untuk menganalisis GlcNAc. Penelitian ini bertujuan untuk memperoleh metode yang valid untuk analisis GlcNAc pada sampel suplemen secara KLT-Densitometri. Hasil optimasi menunjukkan kondisi optimum untuk analisis GlcNAc menggunakan n-propanol-air-NH4OH 70:30:1 sebagai fase gerak dan reagen anilin-difenilamin sebagai penampak noda. Panjang gelombang maksimum yang diperoleh adalah 302 nm. Metode analisis memenuhi semua persyaratan parameter validasi metode analisis dengan nilai koefisien korelasi r 0,99845, LOD 1191.38 g/mL dan LOQ 3971.27 g/mL. Kadar sampel yang diperoleh adalah sebesar 100.07 - 102.47.

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Acetylglucosamine GlcNAc is a monosaccharides glucose derivatives that is widely available in nature. GlcNAc have been used in a pharmaceutical product , food and cosmetics. This study aimed to obtain valid method for analysis GlcNAc in supplement product sample using TLC Densitometry. The optimum condition for analysis was using n propanol water NH4OH 70 30 1 as a mobile phase and sprayed with aniline diphenylamine reagent. The maximum wavelength was 302 nm. This method fulfiled all the criteria of validation with r value of 0.99845, LOD 1191.38 g mL and the LOQ 3971.27 g mL. Conformity with the label provides the results of 100.07 102.47."