Why does the vacuum desktop EDX9000B detect light elements (sodium magnesium aluminum silicon phosphorus) better

X-ray fluorescence (“XRF”) is a technique that has been used for elemental analysis of various samples, including minerals. XRF analyzers determine the chemical properties of a sample by shining an X-ray at a point on the sample and measuring the spectrum of characteristic X-ray 1 emitted by different elements in that sample. The primary source of X-rays can be an X-ray tube or a radioactive material such as a radioisotope. Ang terminong “X-ray”, as used herein, includes photons with energies between about lkeV and about 150keV, and would therefore encompass: characteristic X-rays emitted by an excited atom when it is de-excited; Bremsstrahlung x-rays, which are emitted when electrons are scattered by atoms; And the elastic and inelastic scattering of photons generally referred to as Rayleigh and Compton scattering radiation, respectively.

Why does the vacuum desktop EDX9000B detect light elements (sodium magnesium aluminum silicon phosphorus) better

When exposed to high-energy primary X-rays from a ray source, each atomic element present in one kind of sample produces a unique set of characteristic fluorescent X-rays that are essentially the fingerprint of that particular element. X-ray fluorescence analyzers determine the chemical properties of a sample by illuminating a point on the sample with X1-rays and measuring the spectrum of characteristic X-rays emitted by the various elements in that sample. The primary source of X-rays can be an X-ray tube or a radioactive material such as a radioactive isomer. At the atomic level, characteristic fluorescent X-rays are produced when a photon of sufficient energy hits an atom in that sample, ejecting an electron from one of the inner orbital layers of the atom. The atom then almost immediately regains stability by filling the vacancies left in the inner orbital layer with electrons from one of the higher-energy (outer) orbital layers of that atom. Excess energy can be released in the form of fluorescent X-rays, in the form of energy that characterizes the difference between the two quantum states of the atom. By inducing and measuring a wide range of different characteristic fluorescent X-rays emitted by different elements in the sample, the XRF analyzer is able to determine the element present in the sample and calculate its relative concentration based on the number of fluorescent X-rays 1 occurring at a specific energy. Gayunpaman, except in special cases, portable XRF analyzers are typically unable to directly measure low concentrations of lightelements (those with low atomic numbers, Z typically below 20) because fluorescent X-rays with energies below about 2.5 thousand electron volts (keV) are absorbed over short air path lengths. Kaya nga, light element XRF analysis requires nitrogen purging or vacuum detection of the environment, which may be inconvenient for portable or handheld instruments. The benchtop XRF spectrometer EDX9000A is equipped with a vacuum system, in conjunction with a specially designed optical path, which is perfect for the detection of light elements. This is particularly important for the detection of minerals, such as bauxite or some high-silicon and high-aluminum samples.