完结小说,辰东,欢乐颂小说在线阅读

Chromatography mass spectrometry spectroscopy technology platform


		1、 Chromatography Chromatography is a separation analysis method that utilizes the selective distribution of different substances in different phase states to elute a mixture relative to the stationary phase. Different substances in the mixture move along the stationary phase at different speeds, with the aim of separating the mixture into various pure substances, which are then detected separately using methods such as spectroscopy and mass spectrometry. Divided into liquid chromatography, gas chromatography, etc.
		2、 Mass spectrometry Mass spectrometry technology is an identification technique, and mass spectrometry analysis is an analytical method for measuring the mass charge ratio (mass charge ratio) of ions. It generally consists of a sample introduction system, an ion source, a mass analyzer, a detector, a data processing system, and other components. The basic principle is to ionize the components in the sample in an ion source, generating charged ions with different charge to mass ratios. Through the action of an accelerating electric field, an ion beam is formed and enters the mass analyzer. In a mass analyzer, the opposite velocity dispersion of electric and magnetic fields is utilized to focus them separately and obtain mass spectra, thereby determining their mass. Among numerous analytical and testing methods, mass spectrometry is considered to have the advantages of high specificity, high sensitivity, low sample size, fast analysis speed, and simultaneous separation and identification. It is widely used in various fields such as chemical engineering, microbiology, environment, energy, drug analysis, life sciences, materials science, and food safety.
		3、 Spectral analysis Spectrum: It is a pattern of monochromatic light that is dispersed by a dispersive system (such as a prism or grating) and arranged in sequence according to wavelength (or frequency). It is also known as optical spectrum. Spectroscopy is the analysis of specific spectra obtained through the absorption of light by substances or their own excitation. By using a spectrometer to capture light information, computerized automatic display of numerical values and analysis, it is possible to determine what elements are contained in unknown objects. Heavy metal detection is an important testing item that cannot be ignored in current food safety and environmental testing. Heavy metal pollution is closely related to people's lives, mainly in food, feed, food, vegetables, aquatic products, drinking water, oil, beverages, etc. There are many types of instruments used for detecting heavy metals nowadays, and the most commonly used ones are atomic spectroscopy instruments, mainly including atomic absorption spectroscopy (AAS), atomic fluorescence spectroscopy (AFS), etc.

Atomic absorption spectroscopy

Atomic Absorption Spectroscopy (AAS) is established by utilizing the phenomenon that gaseous atoms can absorb light radiation of a certain wavelength, causing the electrons in the outer layer of the atom to transition from the ground state to the excited state. Due to the different energy levels of electrons in various atoms, they selectively resonate and absorb radiation of a certain wavelength, which is exactly equal to the wavelength of the emission spectrum of the excited atom. This can serve as a qualitative basis for elements, while the intensity of absorbed radiation can serve as a quantitative basis. AAS has become a widely used analytical method for quantitative analysis of inorganic elements, with applications in various fields such as geology, metallurgy, machinery, chemical engineering, agriculture, food, light industry, biomedicine, environmental protection, and materials science. This method is mainly applicable for the analysis of trace and trace components in samples. Flame atomic absorption spectroscopy can measure on the order of 10-9g/mL, while graphite furnace atomic absorption spectroscopy can measure on the order of 10-13g/mL. Its hydride generator can perform micro trace determination of eight volatile elements, including mercury, arsenic, lead, selenium, tin, tellurium, antimony, germanium, etc.

Atomic absorption spectroscopy

Atomic fluorescence spectroscopy is an emission spectroscopy analysis method that quantitatively analyzes the fluorescence intensity emitted by atoms under radiation excitation. Its basic principle is that the ground state atom (usually in a vapor state) absorbs radiation of a specific frequency and is excited to a high-energy state, and then emits fluorescence of characteristic wavelengths in the form of light radiation during the excitation process. Atomic fluorescence spectroscopy is a method of determining the content of a test element by measuring the fluorescence emission intensity generated by the atomic vapor of the test element under radiation excitation. It has been widely applied in various fields such as metallurgy, geology, petroleum, agriculture, biomedicine, geochemistry, materials science, environmental science, etc.

Direction: Technical services in the areas of fungal toxins, drug residues, heavy metal residues, etc
Personnel strength: A team led by a PhD with over 5 years of experience as a quality control supervisor in a large global agricultural and animal husbandry group