Sunday, February 23, 2020

Mass Spectrometry Essay Example | Topics and Well Written Essays - 500 words

Mass Spectrometry - Essay Example The first step involves production of ions of the compound by electron ionization. Each product ion is generated from the molecular ion. The result results are then displayed in a plot of a graph of ion abundance against mass to charge proportion. The ions give information concerning the structure and nature of their original molecule. However, the spectrum of a molecular ion appears at a greater value, which gives the total molecular mass of the substance. Mass spectrometry instrument consist of various components, the detector system that detects ions and record relative abundance of every compound, ion source, which produce gaseous ions and analyser, which resolve ions into their respective mass components. In addition, a computer is also required to monitor and control the instrument, get and manipulate data then use it to compare spectra. With the help of these components, a mass spectrometer can perform various processes. This includes, separating ions in accordance to the ratio of their mass to charge, producing ions from the compound, which is done in the ionization source, fragmenting and analysing ions, processing signals from detector, which are then transmitted to computer system and control the instrument via feedback and detect the ions from the last analyser and measure their abundance. This can be done using the detector, which converts the ions to electrical signals. Mass spectrometry has several advantages compared to the other analytical techniques used. It is highly accurate, can be coupled with liquid chromatography to separate samples further, and has a large mass range, fast, auto runs with sampler or direct injection. On the other hand, it has some drawbacks like it is complicated spectra, salts drown signal which takes more time to filter from the machine, a high intensity peak can eclipse smaller intensity peaks, fine tuning work. In conclusion, although Mass

Friday, February 7, 2020

S.O.A.P Analysis for the ten essays Essay Example | Topics and Well Written Essays - 750 words - 4

S.O.A.P Analysis for the ten essays - Essay Example Once being an ordinary man the narrator could enjoy sensitively the beauty of the sunset on the river but since he became an adept in steamboating he started reading rivers like signs: â€Å"Now when I have mastered the language of the water, and had come to know every trifling feature that bordered the great river as familiarly as I knew the letters of the alphabet, I had made a valuable acquisition†. (100) The author supposes that each and every person can share this experience that is why the auditory is broad. Twain refers to personal experience of every adult. As an example besides his steamboating the author mentions probably one of the most evident professions for such issues- doctors. The author thinks how doctors perceive people knowing so much about person`s body: â€Å"What does the lovely flush in a beauty`s cheek mean to a doctor but a â€Å"break† that ripples above some deadly disease?†. However, this comparison can be applied to every person with broaden consciousness and awareness (96). On the one hand, the author wants to feel compassion for his lost ability to see beauty of the most ordinary things. This observation is painful for him and he regrets that the knowledge of steamboiling made him â€Å"read† nature instead of â€Å"drinking† it. He applies his argument to the doctor`s work: â€Å"Since those days, I have pitied doctors from my heart†. On the other hand, the writer understands that such changes of perception are inevitable for human and he addresses the reader with a rhetorical question: â€Å"And doesn`t he (a doctor) sometimes wonder whether he has gained most or lost most by learning this trade?† (106). The author describes his previous pure perception of the river first. This picture is full of beautiful details: â€Å"A broad expanse of the river was turned to blood; in the middle distance the