This review provides a thorough analysis of the most famous mass transfer models for random and structured packed-bed columns used in absorption/stripping distillation processes, providing detailed description equations to calculate parameters, i.e., gas-side coefficient per unit surface ky [kmol·m?2·s?1], liquid-side kx interfacial packing area ae [m2·m?3], which constitute ingredients assess ...

Packed beds used in absorption columns have shown to increase filter cake permeability during specific filtration processes. Their effect on compressibility is evaluated. Different model systems are characterized using dead-end equipment and a modified universal testing machine. Compression experiments conducted with different packings assess the systems' response compressive stress. The struct...

Single shot proteomics is a promising approach to high throughput proteomics analysis. In this strategy, long capillary columns are needed to perform long and shallow gradients to achieve high peak capacity and good peak width for informative mass spectrometric detection. Herein, we report that meter long capillary columns, packed with 5 μm particulate material, can be facilely fabricated based...

A new extraction procedure is applied here to radioimmunoassay of serum estradiol. Small columns packed with porous, grainy kieselguhr are loaded with the samples. The kieselguhr material acts as support for the water phase, from which the lipophilic compound estradiol is eluted with diethyl ether. With use of a specially constructed rack, several columns can be handled simultaneously, which ma...

New shell-type stationary phases are widely used in fast chromatographic measurements. These columns provide more efficient separation, when applied in a conventional high-performance liquid chromatography instrument, than columns with fully porous particles, and the volume overload of core-shell particles is 60% of the value obtained for fully porous particles. Additionally, to achieve adequat...

Previous work demonstrates that a flame ionization detector (FID) may be used as a detector for high-temperature water separation. However, the relatively high flow rate of the eluent required by standard high-performance liquid chromatography columns causes instability of the FID. In this work, micro-bore columns are packed with poly(styrene-divinylbenzene) (PRP-1) or Daiso gel octadecylsilane...

2 Introduction In the April edition of this magazine1 Ron Majors, in his annual report on new columns and accessories from the Pittsburgh conference, reported how at the 2002 conference the largest number of product introductions were for biomolecule separations and for liquid chromatography–mass spectrometry (LC–MS). He went on to state that speciality HPLC columns for chiral compounds, biomol...