The development of new support and geometries of solid phase microextraction (SPME),
including metal fiber assemblies, coated-tip, and thin film microextraction (TFME)(ie self …

Silica aerogels have a rich history and offer an unusual assembly of gas-and solid-phase
properties that has lent them to many diverse applications. This review starts with a brief …

The liquid milieu in which enzymes operate when they are immobilized in solid materials
can be quite different from the milieu in bulk solution. Important differences are in the …

A low-cost, easy-to-use and portable optical colorimetric sensor determined promethazine
using the oxidation of promethazine by a potassium persulfate reagent entrapped within a …

A sol-gel urea colorimetric method was developed for the determination of urea in feedstuffs.
The sol-gel platform contained p-dimethylaminobenzaldehyde (p-DMAB) as the reagent …

Nanomaterials together with nanotechnologies bring everyday challenges to modern
material science and allow scientists worldwide to develop completely new types of unique …

Immobilized enzymes have been widely exploited because they work as heterogeneous
biocatalysts, allowing their recovery and reutilization and easing the downstream processing …

Monitoring of ammonia in the gas phase, a ubiquitous bulk chemical, is of paramount
importance to ensure the safety of industrial workers. The present paper describes a solid …

In the search for appropriate host matrices for highly luminescent molecular guest species,
an organo-silica monolithic xerogel prepared by the hydrolysis and co-condensation …

A new group of optical CO 2 sensors based on red-emitting pH-sensitive zinc
azaphthalocyanine (Zn-AzaPc) indicators embedded into polyurethane polymeric matrices …