Design and applications of 3D-printed whistles in gas chromatography

• Main Authors: Wu, You-Lun, 吳侑倫
• Other Authors: Lin, Cheng-Huang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/72429875538559848331

碩士 === 國立臺灣師範大學 === 化學系 === 103 === For the first time, a milli-whistle as a gas chromatography (GC) detector is manufactured by 3D printer. When the gas passes through the whistle, a sound with a fundamental frequency is produced. We use the microphone to receive the sound which produced by the whistle and record the frequency change of sound by sound card. The sound frequency is related to the mean molecular weight of the gas which passes through the whistle. Therefore, we can calculate the unknown concentration of the gas by a mathematical formula. The difference between this analysis method and others is that this device doesn’t need chemical reaction. This analysis method just needs physical reaction. Quantitative analysis can be done just by calculating the frequency change. It is suitable for detecting various kinds of gases. The first step of experiment is using ABS which is stabile over 200 degrees Celsius as material to product the whistle which design by 3ds Max. We analyze the effect of different experimental parameters on the sound frequency, scope and strength to find out the most stable whistle structure.