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用氣相色譜法測定甲氧基,乙氧基,羥丙氧基含量
用氣相色譜法測定甲氧基,乙氧基,羥丙氧基含量 詳細信息：

名稱：毛細管柱
固定相：5%苯基-95%甲基聚硅氧烷
規(guī)格：30m*0.32mm*0.25

型號：HH-5

浩瀚色譜（山東）應(yīng)用技術(shù)開發(fā)有限公司建立一個用氣相色譜法測定羥丙甲纖維素中甲氧基,羥丙氧基的含量,乙基纖維素中乙氧基的含量的方法.方法:以HH-5為固定液的毛細管柱(柱長為30m,內(nèi)徑為0.530mm,膜厚度為3.00um),起始溫度為100℃,維持8分鐘,再以每分鐘50℃的速率升溫230℃,維持2 分鐘;進樣口溫度為200℃,檢測器氫火焰離子化檢測器(FID)溫度為250℃.結(jié)果:甲氧基在6.67mg/ml-12.61mg/ml濃度范圍內(nèi)線性關(guān)系良好,得線性方程y = 0.0156x + 0.0302(r=0.9991),回歸系數(shù)大于0.999;乙氧基在10.52mg/ml-19.7mg/ml濃度范圍內(nèi)線性關(guān)系良好,得線性方程y = 0.0333x + 0.023(r=0.9992),回歸系數(shù)大于0.999;羥丙氧基在0.8017mg/ml-5.8106mg/ml濃度范圍內(nèi)線性關(guān)系良好,得線性方程y=0.0487x + 0.0017(r=0.9998),回歸系數(shù)大于0.999. 結(jié)論:該方法簡便,準(zhǔn)確,可用于乙基纖維素,羥丙甲纖維素的質(zhì)量控制.

用氣相色譜法測定甲氧基,乙氧基,羥丙氧基含量  測試譜圖：



Determination of Methoxy, Ethoxy and Hydroxypropoxy by Gas Chromatography
Determination of methoxy, ethoxy and hydroxypropoxy content by gas chromatography Details:

Name: capillary column
Stationary Phase: 5% Phenyl-95% Methylpolysiloxane
Specifications: 30m*0.32mm*0.25

Model: HH-5



Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. established a method for the determination of the content of methoxy and hydroxypropoxy in hypromellose and the content of ethoxy in ethyl cellulose by gas chromatography. Method: take HH-5 capillary column (column length is 30m, inner diameter is 0.530mm, film thickness is 3.00um), the initial temperature is 100°C, maintained for 8 minutes, and then heated to 230°C at a rate of 50°C per minute , maintained for 2 minutes; the temperature of the injection port was 200 °C, and the temperature of the flame ionization detector (FID) of the detector was 250 °C. Results: The linear relationship of methoxy was good in the concentration range of 6.67mg/ml-12.61mg/ml , the linear equation y = 0.0156x + 0.0302 (r=0.9991), the regression coefficient is greater than 0.999; the linear relationship of ethoxy is good in the concentration range of 10.52mg/ml-19.7mg/ml, the linear equation y = 0.0333x + 0.023 (r=0.9992), the regression coefficient is greater than 0.999; hydroxypropoxy has a good linear relationship in the concentration range of 0.8017mg/ml-5.8106mg/ml, the linear equation y=0.0487x + 0.0017 (r=0.9998), the regression coefficient is greater than 0.999. Conclusion: The method is simple and accurate, and can be used for the quality control of ethyl cellulose and hypromellose.

Determination of methoxy, ethoxy and hydroxypropoxy content by gas chromatography Test spectrum: