中国·永利y23455(股份)有限公司

XRF CORE SCANNER

The XRF (X-Ray Fluorescence) Core Scanner is originally designed for rapid and non-destructive determination of the chemical composition of sediments from seas, oceans, and lakes. For example, this sediment material is often obtained using box-cores, gravity-cores and piston-cores, and collected in plastic tubes which are subsequently split in length, providing the perfect sediment surface to analyse for its bulk geochemistry using the Avaatech XRF Core Scanner. Apart from such sediment core material, the Avaatech XRF Core Scanner has also been used on varies other materials, as long as they contain a relatively flat surface, such as coral slabs, rock cores, shell material, sediment trap filters, and loose sediment material in sample cups. The analyses with the Avaatech XRF Core Scanner are typically carried out in laboratories on land, but several Core Scanners are currently placed permanently or occasionally (containerized) onboard ships.

The XRF analysis method uses an X-ray source and detector to be positioned accurately above the surface of your sample. X-rays produced by the X-ray tube irradiate the sample. The elements present in the sample emit fluorescence X-ray radiation with discrete energies that are characteristic for the elements in the sample material. Measuring the energies and intensities it is possible to determine which and how much of these elements are present. The latest Avaatech XRF Core Scanner models are equipped with a 100W rhodium (Rh) X-Ray tube and with a cubed silicon drift detector. The state-of-the-art detectors contain a low capacity preamplifier integrated on the detector crystal, which allow an improved spectral resolution at short peaking times compared to older generation detectors.

The XRF core scanner is able to perform a complete scan for major elements in a one meter long core with a sample resolution of 1 cm within a couple of minutes. Of course, this is dependent on the goals of the user. The inhouse developed software makes it easy to adjust settings to meet the desired goals of users. For instance, to reliable measure trace elements, count times and energy settings can appropriately adjusted. On the other hand, if a very high resolution is required, the resolution can easily be adjusted to be as data dense as 0.1 mm. The core scanner is equipped with a motor actuated door which gives access to the core positioning system. The newest core positioning system allows to position up to three cores of up to 1.5 meters in length at the same time.