葡萄糖干燥失重測(cè)定的操作過程
來源：http://www.eshougou.com.cn 日期：2020-05-05 發(fā)布人：admin
1樣品預(yù)處理
1 sample pretreatment
在樣品容器內(nèi)將樣品充分混勻。如果樣品容器太小,應(yīng)將樣品全部轉(zhuǎn)移容積適當(dāng)?shù)念A(yù)干燥容器內(nèi),以便混勻。
Mix the sample well in the sample container. If the sample container is too small, transfer all the samples to a pre drying container with proper volume for mixing.
2 稱量皿的準(zhǔn)備
2 preparation of weighing dish
將敞開的稱量皿(3.2)和蓋置于干燥箱(3.3)中,在100 ℃下干燥1 h后移入干燥器(3.6)內(nèi),冷卻室溫,稱量,精確0.0002 g。
Put the open weighing dish (3.2) and cover in the drying box (3.3), dry at 100 ℃ for 1 h, and then transfer them into the dryer (3.6), cool them to room temperature, weigh them to the nearest 0.0002 G.
3稱樣
3 weighing sample
稱取大約10 g無水葡萄糖或5g一水葡萄糖于稱量皿中,蓋好蓋,精確0.0002g。
Weigh about 10 g of anhydrous glucose or 5g of monohydrate glucose into the weighing dish, cover well, accurate to 0.0002g.
4測(cè)定
4 Determination
將裝有樣品、蓋好蓋的稱量皿置于干燥箱(3.3)內(nèi),移開蓋,在100 ℃士1 ℃烘干4 h,壓力不超過13500Pa，在干燥過程中,通過干燥系統(tǒng)(3.5)緩慢地向干燥箱內(nèi)注入氣流。
Place the weighing dish with the sample and cover in the drying box (3.3), remove the cover, dry for 4H at 100 ℃ ± 1 ℃, and the pressure shall not exceed 13500pa. During the drying process, slowly inject air into the drying box through the drying system (3.5).
4h后,關(guān)閉真空泵(3.4),使空氣緩慢通過干燥系統(tǒng)進(jìn)入干燥箱內(nèi)，直到干燥箱的壓力恢復(fù)常壓。取出稱量皿前蓋好蓋,放入干燥器內(nèi),冷卻室溫,稱量,精確0.0002 g。
After 4h, close the vacuum pump (3.4), and let the air enter the drying box slowly through the drying system until the pressure of the drying box returns to normal pressure. Take out the weighing dish, cover it well, put it into the dryer, cool it to room temperature, weigh it to the nearest 0.0002g.
不要同時(shí)在干燥器內(nèi)放置四個(gè)以上的稱量皿。
Do not place more than four weighing dishes in the dryer at the same time.
應(yīng)進(jìn)行平行實(shí)驗(yàn)。
Parallel experiments shall be carried out.
注:如果在實(shí)驗(yàn)的過程中或?qū)嶒?yàn)后,原料的顏色明顯變?yōu)辄S色,應(yīng)在相對(duì)較低的溫度下重復(fù)實(shí)驗(yàn),并在報(bào)告中說明。
Note: if the color of the raw material changes to yellow obviously during or after the experiment, the experiment shall be repeated at a relatively low temperature, which shall be described in the report.
關(guān)于無水葡萄糖http://www.eshougou.com.cn就先介紹到這里了，相信大家在實(shí)際的工作中會(huì)用到相關(guān)知識(shí)，如果您有這方面的需要，歡迎前來選購。
About anhydrous glucose http://www.eshougou.com.cn introduced here first, I believe you will use the relevant knowledge in the actual work, if you have this need, welcome to purchase.
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