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rainspout    
n. 落水管

落水管


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  • 2. 3F: Visualizing TLC Plates - Chemistry LibreTexts
    If a compound absorbs 254 nm UV light, it will appear dark, as the compound prevents the fluorescent material from receiving the UV light This method is so quick and easy that it is often the first visualization method tried
  • Chemistry Teaching Labs - Visualising plates
    There are two ways this can work Most commonly the TLC plate being used has a fluorescent compound bound into the stationary phase of the plate The presence of any compound on the plate quenches the fluorescence, leading to a darkened area on the plate
  • Stains for Developing TLC Plates - McMaster University
    While exposing these TLC plates to UV light, you will notice that the silica gel will fluoresce, while any organic molecule which absorbs UV light will appear as a dark blue spot Circling these spots gently with a dull pencil will permit an initial method for visualization
  • Comprehensive Guide to TLC Visualization of Benzoylated Nucleosides
    Their visualization on Thin Layer Chromatography (TLC) plates requires a dual-strategy approach: exploiting the strong UV absorbance of the benzoyl nucleobase systems for non-destructive monitoring, and utilizing specific chemical stains to confirm the integrity of the carbohydrate backbone
  • TLC stains - REACH Devices
    UV light excites a fluorescent additive in TLC plate Compounds screen some of the UV, making fluorescence weaker Sometimes, visible fluorescence is exited by UV making a spot brighter, and so is colored differently than the background A compound must have a chromophore
  • TLC Plate Staining Protocols: Organic Chemistry Lab Guide
    Frequently, the organic compounds of interest contain a chromophore which may be visualized by employing either a short or a long wave UV lamp These lamps may be found as part of a standard organic chemistry research or teaching lab
  • Viewing A Plate - University of Michigan
    There are two common methods in the introductory organic lab used to view developed TLC plates -- UV light and iodine staining Seen below is a protective viewer for examing slides under ultraviolet (UV) light
  • [Solved] different ways to show stains on chromatograms UV light . . .
    Here are some common methods to show stains on chromatograms: 1 UV Light Description: Many compounds, especially aromatic ones, absorb UV light Method: Place the chromatogram under a UV lamp Compounds that absorb UV will appear as dark spots against a fluorescent background
  • Stains for developing TLC plates, the stain list
    While exposing these TLC plates to UV light, you will notice that the silica gel will fluoresce, while any organic molecule which absorbs UV light will appear as a dark blue spot Circling these spots gently with a dull pencil will permit an initial method for visualization
  • Stains for Developing TLC Plates - Docest
    While exposing these TLC plates to UV light, you will notice that the silica gel will fluoresce, while any organic molecule which absorbs UV light will appear as a dark blue spot Circling these spots gently with a dull pencil will permit an initial method for visualization





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