2014年10月24日 · Preconcentration means to increase the concentration of a sample prior to analysis or detection. For example you can do preconcentration for an non-volatile organic sample with evaporation its solvent.

2020年6月15日 · This step in an analytical procedure is known as a preconcentration. An example from the analysis of water samples illustrates how we can simultaneously accomplish a separation and a preconcentration.

Preconcentration is the process by which the concentration of an intended species is increased to gain sensitivity for the subsequent determination.

Preconcentration is a process that involves concentrating and purifying analytes using a sorption material before detection, leading to improved sensor selectivity and lower detection limits for certain analytes in analytical systems.

2019年1月7日 · Preconcentration is the aspect of analytical method development covering the need to improve detection sensitivity. This review collects the advances in a diversity of approaches to achieve preconcentration by solvent removal.

Many isolation techniques involve the use of heat to change the analyte into a gaseous species and are conveniently referred to as thermal evolution techniques. For inorganic analytes it is possible to distinguish those that can sometimes be isolated directly from the …

2020年4月18日 · A preconcentration module operated in flow mode and integrated with a sequential injection system with spectrophotometric detection was developed. Using the system, preconcentration was performed in continuous mode and was based on a membraneless evaporation process under diminished pressure.

2024年1月20日 · This article presents an exhaustive overview of liquid- and solid-phase preconcentration techniques used in combination with ICP-MS for trace element determination in different biological samples from 2000 to the present.

Preconcentration can be absolute or relative. In absolute preconcentration, trace elements are transferred from a large mass of sample into a small mass, e.g. by evaporation or by solvent extraction into a small volume of an organic phase. Relative preconcentration

Preconcentration is the aspect of analytical method development covering the need to improve detection sensitivity. This review collects the advances in a diversity of approaches to achieve preconcentration by solvent removal.