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Related Experiment Videos

Reliability in determination of methanol concentration.

K Niisawa, J Saito, K Ogawa

    Sangyo Igaku. Japanese Journal of Industrial Health
    |May 1, 1986
    PubMed
    Summary

    Determining methanol concentration using glass containers is unreliable due to vapor decomposition. Solid sorbent sampling with silica gel offers a dependable method for accurate methanol analysis.

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    Structure-Activity Relationship of Phloroglucinol Compounds from Eucalyptus as Marine Antifoulants.

    Bioscience, biotechnology, and biochemistry·2016

    Area of Science:

    • Analytical Chemistry
    • Environmental Science

    Background:

    • Methanol vapor can decompose when stored in glass containers, particularly at low concentrations and high surface areas.
    • This decomposition compromises the accuracy of methanol concentration measurements.

    Purpose of the Study:

    • To evaluate the reliability of two distinct sampling methods for methanol concentration determination.
    • To identify a dependable method for accurate methanol analysis in various conditions.

    Main Methods:

    • Investigated methanol vapor decomposition in glass containers with varying surface areas.
    • Assessed methanol decomposition in solid sorbent sampling using silica gel.

    Main Results:

    • Methanol vapor significantly decomposed on glass surfaces, rendering this method unreliable, especially at low concentrations.
    • Solid sorbent sampling with silica gel showed negligible methanol decomposition for amounts exceeding 0.1 microliter.

    Conclusions:

    • Glass container sampling is unsuitable for reliable methanol concentration determination due to significant vapor decomposition.
    • Solid sorbent sampling using silica gel provides a reliable method for accurate methanol concentration analysis.

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