藥用級聚乙烯醇中甲醇和乙酸甲酯測定，液化石油氣，二甲醚，甲縮醛，乙縮醛，乙醇，室內空氣，焦爐煤氣，煉廠氣，天然氣，變壓器油，多氯聯苯，植物油，增塑劑，塑化劑，氨水，氨氣...

藥用級聚乙烯醇中甲醇和乙酸甲酯測定
藥用級聚乙烯醇中甲醇和乙酸甲酯測定 詳細信息：

名稱：毛細管色譜柱

固定相：6% 氰丙基苯基／94% 二甲基聚硅氧烷
極性：弱極性到中等極性固定相
相當于 USP 固定相 G43

型號：HH-624

規格：30m*0.53mm*3.0um

應用：藥用輔料聚乙烯醇質量標準甲醇及乙酸甲酯

藥用級聚乙烯醇 藥典標準CP版醫藥原料

中文名稱:聚乙烯醇
CAS:98002-49-4
英文名稱:VINOL 523
分子式:C₂H₄O
分子量:44.05256

聚乙烯醇樹脂系列產品系白色固體，外型分絮狀、顆粒狀、粉狀三種；無毒無味、無污染，可在80--90℃水中溶解。其水溶液有很好的粘接性和成膜性；能耐油類、潤滑劑和烴類等大多數有機溶劑；具有長鏈多元醇酯化、醚化、縮醛化等化學性質。

浩瀚色譜（山東）應用技術開發有限公司一種測定聚乙烯醇中甲醇和乙酸甲酯含量的方法，包括溶解、鹽析、過濾和測定各單元過程，所述溶解是將聚乙烯醇加入蒸餾水中，聚乙烯醇和蒸餾水的質量比為1：20-30，加熱回流的條件下使聚乙烯醇完全溶解得到聚乙烯醇溶液；所述鹽析是向所述聚乙烯醇溶液中加入無機鹽，無機鹽的添加量是聚乙烯醇質量的6-8倍，常溫攪拌使聚乙烯醇析出，過濾分離收集濾液；通過氣相色譜法測定所述濾液中甲醇和乙酸甲酯的含量。與通用的靜態頂空氣相色譜法相比，準確性和精密度高，重復性好，操作簡便。

藥用級聚乙烯醇中甲醇和乙酸甲酯測定 測試譜圖：



Determination of methanol and methyl acetate in pharmaceutical grade polyvinyl alcohol
Determination of methanol and methyl acetate in pharmaceutical grade polyvinyl alcohol

Name: Capillary Chromatographic Column

Stationary phase: 6% cyanopropyl phenyl/94% dimethyl polysiloxane
Polarity: weak to medium polarity stationary phase
Equivalent to USP stationary phase G43

Model: HH-624

Specification: 30m*0.53mm*3.0um

Application: Quality standard of polyvinyl alcohol for pharmaceutical excipients, methanol and methyl acetate

Pharmaceutical grade polyvinyl alcohol Pharmacopoeia standard CP version pharmaceutical raw material

Chinese name: polyvinyl alcohol
CAS:98002-49-4
English name: VINOL 523
Molecular formula: C2H4O
Molecular weight: 44.05256

Polyvinyl alcohol resin series products are white solid, with three appearances: flocculent, granular, and powder; non-toxic, odorless, and pollution-free, and can be dissolved in water at 80-90°C. Its aqueous solution has good adhesion and film-forming properties; it can withstand most organic solvents such as oils, lubricants and hydrocarbons; it has chemical properties such as esterification, etherification, and acetalization of long-chain polyols.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. A method for measuring the content of methanol and methyl acetate in polyvinyl alcohol, including dissolving, salting out, filtering and measuring each unit process. The dissolving is adding polyvinyl alcohol to distilled water , The mass ratio of polyvinyl alcohol and distilled water is 1:20-30, and the polyvinyl alcohol is completely dissolved under heating and refluxing conditions to obtain a polyvinyl alcohol solution; the salting out is to add inorganic salt to the polyvinyl alcohol solution. The added amount of salt is 6-8 times the mass of polyvinyl alcohol, the polyvinyl alcohol is precipitated by stirring at room temperature, and the filtrate is collected by filtration; the content of methanol and methyl acetate in the filtrate is determined by gas chromatography. Compared with the general static headspace gas chromatography, it has high accuracy and precision, good repeatability and easy operation.



Determination of methanol and methyl acetate in pharmaceutical grade polyvinyl alcohol Test spectrum:

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