碳氫化合物

1.照氣相色譜法(通則0521)測定供試品氣體取本品,即得對照品氣體取甲烷含量為0.0020%的氣體(以氮氣為稀釋劑)。

2.色譜條件用玻璃球為填料的色譜柱(4mm×0.8m,80目);柱溫為110℃;進樣口溫度為110℃;檢測器為火焰離子化檢測器,溫度為120℃。

3.測定法

精密量取供試品氣體與對照品氣體,分別注入氣相色譜儀,在凈化溫度為360℃時測得的峰面積為相應空白值;精密量取供試品氣體與對照品氣體,分別注入氣相色譜儀,測定峰面積,減去相應空白值后的峰面積為校正峰面積限度按外標法以校正峰面積計算,含碳氫化合物(以甲烷計)不得過0.0020%。

中國藥典2020年版CO2分析  測試譜圖：



CO2 analysis of Chinese Pharmacopoeia 2020 edition
Analysis of CO2 in Chinese Pharmacopoeia 2020 Edition Details:

Name: Glass Ball Column
Specifications: 4mm×0.8m, 80 mesh (metric size); 1m*1/8 (80 mesh, Agilent, Shimadzu, Thermo Fisher, Varian, Brook, PE and other imperial sizes)
Model: HH-BLQ
Application: Chinese Pharmacopoeia 2020 Edition--Determination of Hydrocarbons in Carbon Dioxide

Hydrocarbon

1. According to gas chromatography (general rule 0521) to determine the test sample gas to take this product, that is, the reference sample gas is 0.0020% methane content gas (with nitrogen as the diluent).

2. Chromatographic conditions use a chromatographic column (4mm×0.8m, 80 mesh) filled with glass balls; the column temperature is 110℃; the temperature of the injection port is 110℃; the detector is a flame ionization detector, and the temperature is 120℃.

3. Determination method

Precisely measure the test gas and reference gas and inject them into the gas chromatograph respectively. The peak area measured when the purification temperature is 360°C is the corresponding blank value; precisely measure the test gas and reference gas and inject them into the gas phase. The chromatograph measures the peak area, and the peak area after subtracting the corresponding blank value is the calibrated peak area. The limit is calculated based on the calibrated peak area by the external standard method, and the hydrocarbon content (calculated as methane) shall not exceed 0.0020%.

Chinese Pharmacopoeia 2020 edition CO2 analysis test spectrum: