What are the characteristics of a handheld spectrometer?

A handheld spectrometer is a spectral analysis instrument based on XRF (X Ray Fluorescence) spectral analysis technology. It is mainly composed of an X-ray tube, a detector, a CPU, and a memory. Due to its portability, high efficiency, portability, and accuracy, it has important applications in the fields of alloys, ores, environment, and consumer products. A handheld spectrometer is required to have high resolution and signal-to-noise ratio, better intensity accuracy and wavelength accuracy, strong resistance to external interference, and excellent instrument stability. The instrument software is required to be able to perform complex mathematical calculations such as derivatives and deconvolution, calculate the similarity between spectra, perform pattern recognition analysis, support multivariate correction analysis, and allow users to build and search spectral libraries.

Product Principle

The handheld spectrometer is a spectral analysis instrument based on XRF spectral analysis technology. When high-energy X-rays with energy higher than the binding energy of the inner electrons of atoms collide with atoms, an inner electron is expelled to form a hole, making the entire atomic system unstable. When the outer electron jumps to the hole, a photoelectron is generated. The ejected photon may be absorbed again and expel another secondary photoelectron in the outer layer, resulting in the Auger effect, also known as the secondary photoelectric effect or the radiation-free effect. The expelled secondary photoelectron is called an Auger electron. When the outer electron jumps into the inner hole, the energy released is not absorbed by the atom, but is emitted in the form of photons, which generates X-ray fluorescence, and its energy is equal to the energy difference between the two energy levels. Therefore, the energy or wavelength of X-ray fluorescence is characteristic and has a one-to-one correspondence with the element. According to Moseley's law, as long as the wavelength of the fluorescent X-ray is measured, the type of element can be known, which is the basis of the qualitative analysis of fluorescent X-rays. In addition, the intensity of fluorescent X-rays has a certain relationship with the content of the corresponding element, based on which quantitative analysis of elements can be performed. The X-ray detector converts the optical signal of the characteristic spectrum line of the X-ray of the sample element into an easily measurable electrical signal to obtain the characteristic information of the element to be measured.

Features

——On-site testing, fast and non-destructive, no need to send to the laboratory, greatly improving efficiency

——The analysis speed is much faster than that of a desktop spectrometer, and the analysis results can be displayed in just a few seconds

——Small size, light weight, easy to carry