Please help analyze this sentence: This gives sodium pentosan polysulfate as a white t
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Please help analyze this sentence: This gives A as a white to off white solid which is collected by B. I’m not sure what it means. Last edited by Lailai on 2009-4-2 22:48]
Sodium pentosan polysulfate appears as a white to off-white solid, which is obtained by Buchner filtration and then washed with methanol (200 ml), acetone (200 ml) and ether (200 ml). After being filtered using the Buchner method and washed with methanol, acetone and ether, a protein known as sodium polyuronate forms on this solid.
Sodium pentosan polysulfate: This substance appears as a white to off-white solid. It is isolated using a Buchner funnel, and then washed with methanol (200 ml), acetone (200 ml), and ether (200 ml). The white sodium pentosan polysulfate is converted into a colorless solid through these washing steps, with methanol (200 ml), acetone (200 ml), and ether (200 ml) being used in that order for washing.
The whole sentence isn’t difficult; the challenge lies in understanding \"a white to off white solid\": from the original sentence, it’s clear that \"a white to off white\" is used to describe \"solid.\" A quick search online will provide the answer: \"off white\" is an adjective meaning nearly pure white (grayish or beige in color). Therefore, \"a white to off white solid\" refers to a solid that is white to off-white in color
That’s right; I stopped here before. Later I looked up “off white” and found out that it is used as an adjective to describe “solid”. Thank you.
sodium pentosan polysulfate – sodium wood polysulfide? http://www.jkzhan.com/ypcx/200706/18095.html This states that sodium pentosan polysulfate is a white to off-white solid, which is obtained through Buchner filtration and then washed with methanol (200 ml), acetone (200 ml), and ether (200 ml). My attempt: After washing with methanol (200 ml), acetone (200 ml), and ether (200 ml) respectively, the substance was filtered using a Buchner funnel, resulting in sodium pentosan polysulfate, which is a white to off-white solid. (I understand it as: first wash with methanol and then filter, then wash with propane and filter, and finally wash with ether and filter.) ）