A simple assay method for theophylline in plasma using thin layer chromatography (TLC) was developed. The method involves extraction of the drug and internal standard (acetaminophen) by chloroform-isopropanol (75:25) followed by separation on TLC silica plates using a mixture of acetic acid, isopropanol, toluene (1: 12: 6), as the eluting solvent. Both peak height ratios and peak are ratios sho...

In this study, a reactive distillation column for production of isopropanol was investigated. Firstly, dynamic model developed the process. The process then programmed, and simulated using base case obtained from literature. Results showed that distillate contained more than 58 mol% propylene-free<br /> isopropanol. next step, optimization some operating variables performed to<br maxim...

In order to improve the adsorption performance of molecular sieve honeycomb ceramics for VOCs, author proposes a research method VOCs based on loaded with sieves. The prepared cordierite ceramic-supported HY, Na Y, USY, ZSM-5-300, and ZSM-5-360 monolithic materials by coating method. Using toluene, ethyl acetate, isopropanol, acetone as adsorbates, properties single-component mixed-component or...

Hybrid materials, i.e., the organically modified silicates (ORMOSIL) based on zincphthalocyanine (ZnPc) and silica glass matrix were synthesized by sol-gel method using protic solvents (methanol, ethanol, isopropanol, butanol) aprotic solvent (N,N-dimethylformamide; DMF). The effect of an alkaline environment with NaOH addition (a single-stage process) acid–alkaline CH3COOH-NH4OH HCl-NaOH two-s...

In order to understand the rheological properties of cementitious suspensions at early stages, among other phases, formation ettringite and its time-dependent influence, whether by amount or morphology, has be examined in detail using a suitable method stop hydration process. It is state-of-the-art exchange water with isopropanol, however, initially remains system possibly leading reduced time ...

A single-site Fe catalyst was prepared from bio-based precursors: xylose and haemoglobin. Its catalytic activity, selectivity, recyclability for nitroarene transfer hydrogenation using isopropanol, benzimidazole preparation, is reported.