Nonaqueous on-line simultaneous determination of metals by size exclusion chromatography with inductively coupled plasma atomic emission spectrometric detection

Abstract

The development of a simultaneous on-line detector for metal species separated by effective molecular size is described. A new spray chamber to facilitate this analysis In relatively hlgh-volatllity organic solvents and to serve as the Interface between a liquid chromatography (LC) and an inductively coupled plasma atomic emission spectrometer (ICP-AES) is evaluated. Detection limits In toluence are comparable to those found in aqueous static operation of ICP-AES. The requirements of computer-based data output and examples of the output developed are presented. The LC-ICP Interface Is demonstrated by size separation of three synthetic mixtures. Two of the mixtures are Iron and silicon organometallic species with different ligands attached, while the third mixture consists of aproximately 20 different metals in essentially the same ligand environment.

A Primer on the Analytical Aspects of Silicones at Trace Levels-Challenges and Artifacts – A Review

“…As in the case of GC, various detection systems such as a refractive index detector, light scattering, and inductively coupled plasma atomic emission spectroscopy (ICP-AES) can be used to detect the eluted components. A variety of silicones have been analyzed by GPC [51][52][53][54][55][56][57]. GPC coupled with a refractive index detector has been used to monitor degradation of silicones in soil [9,10,58].…”

“…Precautions against dust contamination, use of dust-free tubes, micropipette tips, wiping the work area with moist cloth, etc., greatly reduce the contamination problem. Recently, ICP methodology is gaining popularity mainly due to high sensitivity and multi element capability [55][56][57][119][120][121]. PDMS ranging in viscosity of 100-12500 cSt at 1-100 ppm concentration have been analyzed by ICP.…”

Silicon speciation by hyphenated techniques for environmental, biological and industrial issues: A review

“…Hausler and Taylor have achieved PDMS separation by SEC-ICP-OES with detection limits ranging between 0.03 to 3 mg L À1 of Si. 171,172 This hyphenated technique was applied in water and sludge extracts with LOD of 160 mg L À1 of Si. 158 PDMS separation with molecular mass between 550 and 500 000 g mol À1 using THF and xylene as mobile phases has been established.…”

Comparison of microconcentric and membrane-desolvation sample introduction systems for determination of low rare earth element concentrations in surface and subsurface waters using sector field inductively coupled plasma mass spectrometry

“…This can be achieved by minimizing the solvent load using a cooled spray chamber [28,29], and by transporting the aerosol produced with an ultrasonic nebulizer (USN) through a heated tube at 140°C, followed by a desolvating condenser at minus 10°C [30]. In general detection limits are substantially improved with decreasing spray chamber and increasing heating stage temperatures.…”