Activation Analysis of Biological Materials

EELS and EFTEM Analysis of Biological Materials

The high sensitivity of electron energy-loss spectroscopy (EELS) for detecting light elements at the nanoscale in the analytical electron microscope makes it a valuable technique for applications to biological materials [1]. In particular, EELS provides quantitative information about elemental distributions within subcellular compartments, and the number of specific atoms that are bound to indi...

Determination of chromium in biological materials by radiochemical neutron activation analysis (RNAA) using manganese dioxide

A procedure based on radiochemical neutron activation analysis was developed for the determination of chromium in biological materials. The procedure consists of irradiation of reference and test samples in a nuclear reactor, microwave sample digestion, selective and quantitative radiochemical separations of chromium and gamma-ray spectrometric measurement of 51Cr. Separation of chromium from t...

Determination of arsenic and mercury in biological materials by neutron activation analysis.

Flotation of Biological Materials

Flotation constitutes a gravity separation process, which originated from the minerals processing field. However, it has, nowadays, found several other applications, as for example in the wastewater treatment field. Concerning the necessary bubble generation method, typically dispersed-air or dissolved-air flotation was mainly used. Various types of biological materials were tested and floated ...

Specimen Preparation and Calibration for NanoSIMS analysis of Biological Materials

In order to achieve reliable and reproducible analysis of biological materials by SIMS it is critical both that the chosen specimen preparation method does not modify substantially the in-vivo chemistry that is the focus of the study and that any chemical information obtained can be calibrated accurately by selection of appropriate standards. In Oxford we have been working with our new Cameca N...