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On-Line SPE with the Flexcube/6460 QQQ

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Oxidative Degradation of Amines in CO 2 Capture Andrew Sexton January 10, 2008

Oxidative Degradation of Amines in CO 2 Capture Andrew Sexton January 10, 2008 Department of Chemical Engineering The University of Texas at Austin. Overview . Introduction Prior Oxidative Degradation Research Research Objectives Experimental Methods Degradation Apparatus

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Review of the previous lecture:

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Determination of Urea (BUN) in serum

Determination of Urea (BUN) in serum. ( Urease method ). DESCRIPTION. Urea is a waste product which produced in the liver , dissolved in blood (in a concentration of 2.5 - 7.5 mM), and secreted by the kidney .

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min

1. 4. mAU. 175. 2. 6. 5. 150. 3. 7. 1 4-Acetamidophenol 2 Caffeine 3 2-Acetamidophenol 4 Acetanilide 5 Acetylsalicylic Acid 6 Phenacetin 7 Salicylic Acid. 125. 100. 75. 50. 25. 0. 0. 0.25. 0.5. 0.75. 1. 1.25. 1.5. 1.75. 2. min. mAU. 1. 175. 4. 150. 2.

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Stability-indicating RP-HPLC method for the simultaneous determination of clidinium bromide and chlordiazepoxidein pharm

A novel stability indicating RP-HPLC method was developed and vali- dated for simultaneous determination of clidinium bromide and chlordiaz- epoxide in pharmaceutical dosage form. Kromasil RP- C18 (250 mm x 4.6 mm, 5 u00b5m) column was used for separation of the components. A mobile phase comprising of a mixture of methanol: acetonitrile: water in the ratio 40:50:10 (v/v) was degassed under ultrasonication before use.

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Method development and validation for simultaneous estimation of Paracetamol and Etoricoxib in pharmaceutical dosage for

A RP-HPLC method was developed for simultaneous estimation of Paracetamol and Etoricoxib tablet formulation using Phenomenex Luna C18 column (250 mm × 4.6 mm id, 5 µm particle size) and a mobile phase of methanol : water (70:30 v/v), at flow rate 1.0 ml/min with UV detection at 235 nm. The retention time (tR) of Paracetamol and Etoricoxib found to be 3.07 and 5.72 min respectively. The proposed method was validated for system suitability, specificity, linearity, accuracy, precision, LOD, LOQ and robustness. All parameters were found to be within the acceptance limit. Linearity over the concentration range 5-30 µg/ml for both Paracetamol and Etoricoxib with regression coefficient (r2 ) 0.9998 and 0.9994 respectively. Limit of detection (LOD) found to be 0.10 µg/ml and 0.04 µg/ml whereas limit of quantitation (LOQ) found to be 0.33 µg/ml and 0.13 µg/ml for Paracetamol and Etoricoxib respectively. The accuracy of the proposed method was determined by recovery studies and found to be 99.74%- 101.25% and 99.08%-99.21% for Paracetamol and Etoricoxib respectively.

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