如何計算ppm? - 酒精
By Harry
at 2014-04-14T00:00
at 2014-04-14T00:00
Table of Contents
小白目前有1g的萘乙酸(NAA),然後用500mL的95%酒精溶解,再加入499g的滑石粉,均勻攪拌後,曬乾磨粉。請問他自製的發根粉含有幾ppm的NAA?
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酒精
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By Callum
at 2014-04-18T20:24
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