echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Biochemistry News > Biotechnology News > Identification of cyanide.

    Identification of cyanide.

    • Last Update: 2020-10-27
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

    4 to 5 bitter almonds, grated, add 3 ml in a 50 ml conical bottle.5% sulfuric acid solution, fully mixed, stuffed, the following (1), (2) reaction.(1) sodium bitter acid test: take
    filter paper
    first drop with saturated bitter acid intrusion, slightly dry, then add 10% sodium carbonate 1 to 2 drops wet, dry, suspended in the above conical bottle, in the water bath
    heated
    10 minutes, filter paper gradually turned orange or brick red.(2) take the filter note first drop plus 3 to 4 drops of the more invasivating wood tree ester alcohol solution wetting, dry, then add 1% sodium sulfate 3 to 4 drops wetting, hanging in the same cone-shaped bottle, placed, filter paper gradually changed to bright blue (placed over-color fade).(3) iron cyanide reaction (Prussian reaction): take another grain of bitter kernels, put in
    test tube
    , add water 1 to 2 drops wet (do not overdo), immediately use has been 10% NaOH
    reagents
    1 drop of wet filter paper hanging on the tube mouth 50 degrees C water bath for about 10 minutes, the filter paper out, add 10% FeSO4 liquid 1 drop on the filter paper, plus 10% HCl1 to 2 drops and 1% FeCl3, test liquid 1 drop is blue..
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.