【Daily Question】Chemical Engineering Principles 554: Determining Dissolved Oxygen (May 11)
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The Chemical Engineering Theory section is launching the \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\" – we hope you will give it your active support~~~ Replies to the \"One Question per Day\" campaign can be viewed directly at **; the topic will be closed after 1 day! ! To encourage continued participation from everyone this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer: How many hours should the alkaline sodium indigo disulfonate buffer prepared for measuring dissolved oxygen be kept before use? 8
When measuring dissolved oxygen, the prepared alkaline sodium indigo disulfonate buffer should not be left standing for more than 8 hours.
When measuring dissolved oxygen, the prepared alkaline sodium indigo disulfonate buffer should not be left standing for more than (8) hours
When measuring dissolved oxygen, the prepared sodium alkaline indigo disulfonate buffer should not be used for more than 8 hours; otherwise, it needs to be prepared again.