A simple gas-liquid chromatographic method for the measurement of some of the major steroids in urine is described. The system uses conventional packed columns, automatic injection and is linked to an integrator. Calculations are all carried out by computer. The system is recommended as a simple screening procedure, producing a urinary steroid 'profile', which can process large numbers of urine...

The usability of a state of the art CFD simulation package as a tool for analyzing the fluid-dynamic performance of internals encountered in packed distillation columns, such as initial gas distributors, liquid distributors and liquid collectors is demonstrated. A 1.4 ID column hydraulics simulator was used to provide detailed experimental evidence on the gas distribution pattern imposed by var...

The separation of free fatty acids was performed with supercritical fluid chromatography (SFC) on analytical lab scale apparatus. Experiments were performed using fatty acids, which occur in vegetable oils in different amounts. Free fatty acids were analyzed without derivatization. Several stationary phases of packed columns and types of detectors were used to achieve efficient free fatty acids...

In the title complex, [PtCl2(C12H6N2O2)]·CH3CN, the Pt(II) atom lies in a slightly distorted square-planar arrangement defined by an N2Cl2 donor set. In the packed structure, columns of complex moieties are stacked such that the neighboring units are oriented at 180° and laterally displaced with respect to each other. This prevents any overlap of the phenanthroline rings and thus there is no po...

The packing of submicrometer sized silica beads inside a microchannel was enabled by a novel method which avoids the complication and limitations of generating a frit using conventional approaches and the restriction of flow using a submicrometer sized weir. A micrometer sized weir and two short columns of 5 μm and 800 nm silica beads packed in succession behind the weir together functioned as ...

On-chip liquid chromatography (LC) refers to LC technology that is miniaturized fit on a microchip enable fast, high-throughput analysis, with small sample volumes and low reagent consumption. Four different on-chip approaches have been developed date: use of open-tubular, packed-particle, monolithic, pillar array columns. These methods applied proteomics as well the analysis molecules drugs in...

Additive manufacturing is a promising tool for tailored solutions in chemical engineering. This applies particular to the design of lab-scale packed bed columns. We present experimental results characterize 3D printed structured metal packing and compare it conventional counterpart. The indicate that necessary adjustments process material have an influence on important operating parameters, res...

The flooding of packed columns is accompanied by a steep increase in liquid hold-up and pressure drop, resulting lower mass transfer efficiency potential damage to equipment. This study aims investigate, for the first time, feasibility Electrical Capacitance Tomography Convolutional Neural Networks as an intensified alternative conventional prediction methods. allows variations predominant char...