专用型国产气相色谱仪及DNP填充柱测定白酒中的主要香味组分

Determination of Major Flavor Components in Chinese Spirits Using a Special Domestic Gas Chromatograph with DNP Packed Column

采用微机控制的国产气相色谱仪和自制的DNP填充柱测定了白酒中的主要香味组分。通过对各种操作参数的优化 ,确立了等温及程序升温时合适的色谱条件。该方法除可测定十余种主要醇、酯、醛组分外 ,还将分析对象扩大至丙酮、异戊醛、2 戊酮、2 戊醇、3 羟基 2 丁酮等组分 ,从而使采用这一技术可准确测定的组分增至 1 8种。在选定的色谱条件下 ,仪器具有良好的稳定性 ,各香味组分定量结果的重复性好。

A method using a domestic gas chromatograph controlled by computer with a homemade DNP packed column for the determination of major flavor components in Chinese spirtis is described. This chromatograph was developed under the sponsorship of the Ministry of Science and Technology. Optimizations of the operating parameters were undertaken in order to establish the chromatographic conditions suitable for isothermal and programmed temperature gas chromatography. The expanded analytical objects, including acetone, iso valeraldehyde, 2 pentanone, 2 pentanol, acetoin, could also be quantitatively determined along with more than ten major components such as alcohols, esters, aldehydes, therefore, a total of 18 flavor components were accurately determined by this method. Under the selected chromatographic conditions, the instrument showed good stability and the repeatability of quantitative results was satisfactory. The suitability of this gas chromatograph is also discussed.