Quantitative and qualitative applications can be made of mass spectrometry these consist of identifying unidentified compounds, figuring out the isotopic makeup of the molecules' constituent elements, and figuring out the structure of the compound by watching it break down. Counting the number of compounds in a sample or learning the fundamentals of gas phase ion chemistry are two additional applications. By the year 1884, the word "spectrograph" had entered the language of science on a global scale. Mass spectrographs are old-style spectrometry instruments that record the spectrum of mass values on a photographic plate and measure the mass-charge ratio of ions. If the mass spectroscope doesn't look like a mass spectrograph, the ions are steered back toward the phosphor screen. Early equipment that needed to see the results of modifications right away used a mass spectroscope arrangement. The photographic plate is inserted and exposed once the apparatus has been correctly adjusted. The phrase "mass spectroscope" was still retained despite the oscilloscope being used to take indirect measurements instead of the direct brightness of the phosphor screen. In 1918 and 1919, respectively, Arthur Jeffrey Dempuster and F.W. Aston founded the modern mass spectrometry techniques. Ernest O. created the coulotrans, or sector mass spectrometers. created by Lawrence and utilised during the Manhattan Project to separate uranium isotopes. Uranium enrichment was carried out at the Y-12 plant in Oak Ridge, Tennessee, which was established during World War II, using Callatron mass spectrometers. Hans Dehmelt and Wolfgang Paul shared the 1989 Nobel Prize in Physics for their work in the 1950s and 1960s developing the ion trap technique. An analytical method for determining the mass-to-charge ratio of ions is mass spectrometry (MS). The intensity as a function of mass-to-charge ratio is plotted to show the results as the mass spectrum. The application of mass spectrometry to pure samples and complicated molecules is widespread and employed in many different fields. The ion signal is plotted as a function of the mass-to-charge ratio using the mass spectra. The mass of cells and molecules, the elemental or isotopic signature of the model, and the chemical id or structure of molecules and other chemical compounds are all determined by this spectrum. In a typical MS process, an object such as a solid, liquid, or gas is ionised, for instance by being bombarded by an electron beam. As a result, some molecules in the sample can separate into positively charged pieces or remain positively charged without splitting. These ions (fragments) are then sorted based on their mass-charge ratio, for instance by speeding them up and applying an electric or magnetic field; ions with the same mass-charge ratio are deflected in the same manner. Ions are found using a detector for charged particles, such as an electron coefficient. The findings are represented as a spectrum of ion signal intensities that are related to mass-to-charge ratio. It has a number of benefits as an analytical method, including: greater sensitivity than many other analytical techniques because the analyzer, acting as a mass-charge filter, reduces background interference, with excellent specificity, molecular weight information about typical fragmentation samples, and the ability to confirm the presence of suspicious compounds Data, tentatively fixed chemical information.