What is a Mass Spectrometer?

Mass spectrometer is also called mass spectrometer. An instrument that separates and detects different isotopes. That is, based on the principle that charged particles can be deflected in an electromagnetic field, a type of instrument that separates and detects the composition of matter according to the mass difference of matter atoms, molecules or molecular fragments. Mass spectrometers are divided into isotope mass spectrometers, inorganic mass spectrometers, and organic mass spectrometers according to their applications. It is divided into high-resolution, medium-resolution, and low-resolution mass spectrometers according to the resolution ability; it is divided into static instruments and dynamic instruments according to the working principle.

Mass spectrometer can use high energy electron flow, etc.

Organic Mass Spectrometer

The basic working principle of organic mass spectrometers: ionize the measured substance by electron bombardment or other methods to form ions of various mass-to-charge ratios (m / e), and then use electromagnetic principles to separate the ions according to different mass-to-charge ratios and Measure the strength of various ions to determine the molecular weight and structure of the test substance.

Ion trap mass spectrometry

Organic mass spectrometer is mainly used for structural identification of organic compounds. It can provide structural information such as molecular weight, elemental composition and functional groups of compounds. Divided into quadrupole mass spectrometer, ion trap mass spectrometer, time-of-flight mass spectrometer and magnetic mass spectrometer.

An important aspect of the development of organic mass spectrometers is the use of various instruments (gas chromatography, liquid chromatography, thermal analysis, etc.). Its basic working principle is: using an instrument with separation technology as the "injector" of the mass spectrometer, separating the organic mixture into pure components and entering the mass spectrometer, giving full play to the analysis expertise of the mass spectrometer, for each group It provides molecular weight and molecular structure information.

It can be widely used in organic chemistry, biology, geochemistry, nuclear industry, materials science, environmental science, medical health, food chemistry, petrochemical and other fields, as well as special analysis aspects such as space technology and public security work.

Mass spectrometer

The working principle of inorganic mass spectrometer is different from that of organic mass spectrometer. The way of ionization is different. Inorganic mass spectrometer uses inductively coupled high-frequency discharge (ICP) or other methods to ionize the test substance.

Inorganic mass spectrometers are mainly used for trace analysis of inorganic elements and isotopic analysis. Divided into spark source mass spectrometer, ion probe mass spectrometer, laser probe mass spectrometer, glow discharge mass spectrometer, inductively coupled plasma mass spectrometer. Spark source mass spectrometer can not only perform solid sample overall analysis, but also surface and layer-by-layer analysis and even liquid analysis; laser probe mass spectrometer can perform surface and depth analysis; glow discharge mass spectrometer has high resolution and high sensitivity , High-precision analysis, the scope of application includes most elements in the periodic table, fast analysis speed, convenient for solid analysis; inductively coupled plasma mass spectrometry, spectral lines are simple and easy to identify, sensitivity and measurement accuracy are very high.

Mass spectrometry is characterized by fast testing speed and accurate results. Widely used in geology, mineralogy, geochemistry, nuclear industry, materials science, environmental science, medical health, food chemistry, petrochemical and other fields, as well as special analysis aspects such as space technology and public security work.

Isotope mass spectrometer

Isotope mass spectrometry is characterized by fast test speeds, accurate results, and low sample usage (on the order of micrograms). Can accurately determine the isotope ratio of the element. Widely used in nuclear science, geological dating, isotope dilution mass spectrometry analysis, isotope tracer analysis.

Mass spectrometer ion probe

Ion probes use focused primary ion beams as microprobes to bombard the sample surface, measure the secondary ions of atoms and molecules, and separate them according to the mass-to-charge ratio (m / e) in a magnetic field. Ion images, and then qualitative and quantitative information of the elements are obtained through analysis and calculation. Different types of samples must be prepared before testing. Ion probes have the characteristics of both electronic probes and spark mass spectrometers. Electron probe microanalysis can be used to detect trace elements below the limit and study their local distribution and segregation. Can be used as an isotope analysis. It can analyze very thin surface layer and surface adsorbate, and can perform vertical concentration analysis during surface analysis. Imaging ion probes are suitable for the analysis of many different types of samples, including metal samples, semiconductor devices, non-conductor samples such as polymers and glass products. Widely used in metal, semiconductor, catalyst, surface, thin film and other fields, as well as research departments in environmental science, space science and biochemistry.