6 Minute ReadIntroduction One of the very first posts on this site introduced the basics of Absorption Spectroscopy and the concepts of Absorbance and Transmittance of light through homogeneous materials. In this article we are going to consider this topic in a little more detail through the Beer-Lambert law and use the relationship to determine the concentration […]
The Beer-Lambert Law and Spectrophotometric Analysis Read More »
7 Minute ReadIntroduction In Part I of this post we briefly described some of the properties of the iodine molecule. The position of iodine in the Periodic Table and its electron configuration was outlined. This determines many of the physical and chemical properties of iodine and its reactivity. We then described some of the spectroscopic theory that
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11 Minute ReadIntroduction Iodine. Atomic number 53. Chemical symbol I. Iodine is the rarest of the stable halogens, if we ignore the radioactive elements Astatine (At) and the recently discovered (in 2010) element Tennessine (symbol Ts). Both are extremely rare and extremely unstable. Iodine is situated in Group 17 of the Periodic Table – for older students
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5 Minute ReadMeasuring the fluorescence from highlighter pens is always an interesting educational experiment to try and is very popular in schools and colleges to demonstrate the basic principles of fluorescence and spectra. Usually, green, blue or violet laser pointers are used to excite the sample.
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