本法系用氣相色譜法（通則0521）（（通則0521））測定酒劑或酊劑等含乙醇制劑中甲醇的含量。除另有規(guī)定外，按下列方法測定。
第二法（填充柱法）
色譜條件與系統(tǒng)適用性試驗 用直徑為0.18~0.25mm的二乙烯苯-乙基乙烯苯型高分子多孔小球作為載體；柱溫125℃。理論板數(shù)按甲醇峰計算應(yīng)不低于1500；甲醇峰、乙醇峰與內(nèi)標(biāo)物質(zhì)各相鄰色譜峰之間的分離度應(yīng)符合規(guī)定。
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傳統(tǒng)的填充柱想要達到1000以上的理論塔板數(shù)，非常困難，為了解決這一難題，
浩瀚色譜（山東）應(yīng)用技術(shù)開發(fā)有限公司，研制出《藥典0521甲醇的理論塔板數(shù)測定專用色譜柱》測定藥典中甲醇，丙酮，乙醇等的理論塔板數(shù)，甲醇高達30000以上，效果不錯。
在安捷倫，島津，賽默飛，瓦里安，布魯克，PE等儀器上均可獲得滿意的結(jié)果?！ ?br />
此柱為浩瀚色譜，經(jīng)過特殊處理而生產(chǎn)的
此柱為浩瀚色譜的特色產(chǎn)品
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名稱：不銹鋼填充柱
規(guī)格：3m*1/8
型號：HH-TBS-III
應(yīng)用：藥典0521理論塔板數(shù)的測定
適用于：安捷倫，島津，賽默飛，瓦里安，布魯克，PE
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This method uses gas chromatography (General Rule 0521) to determine the content of methanol in ethanol containing preparations such as alcoholic beverages or tinctures. Unless otherwise specified, determine according to the following methods.
The second method (filling column method)
The chromatographic conditions and system suitability test uses porous polymer beads of diethylbenzene ethylethylethylethylbenzene type with a diameter of 0.18-0.25mm as the carrier; The column temperature is 125 ℃. The number of theoretical plates calculated based on the methanol peak should not be less than 1500; The separation degree between adjacent chromatographic peaks of methanol peak, ethanol peak, and internal standard substance should comply with regulations.
It is very difficult for traditional packed columns to achieve a theoretical tray number of over 1000. To solve this problem
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed a specialized chromatographic column for determining the theoretical plate number of methanol, acetone, ethanol, etc. in Pharmacopoeia 0521. The column has been used to determine the theoretical plate number of methanol, acetone, ethanol, etc. in Pharmacopoeia 0521, with methanol reaching over 30000 and achieving good results.
Satisfactory results can be obtained on instruments such as Agilent, Shimadzu, Thermo Fisher, Varian, Bruker, PE, etc.?
This column is produced through special processing for the Haohan chromatography
This column is a characteristic product of Haohan Chromatography
Name: Stainless Steel Filled Column
Specification: 3m * 1/8
model: HH-TBS-III
Application: Determination of theoretical tray number in Pharmacopoeia 0521
Applicable to: Agilent, Shimadzu, Thermo Fisher, Varian, Brooke, PE
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