The purpose of this research is not utilizing low temperature concentrated-recharged column analysis method of the original TMA but directly injecting a simplified condensed sample that is analysed with SPME equipment and an efficient way to study through Headspace-GC analysing method in terms of li...
The purpose of this research is not utilizing low temperature concentrated-recharged column analysis method of the original TMA but directly injecting a simplified condensed sample that is analysed with SPME equipment and an efficient way to study through Headspace-GC analysing method in terms of linearity and analysis accuracy, and the other is finding the difference of the TMA concentration, setting up the cornerstone of foul odor's environment analysis as the method of sample acquirement and the length of remaining time inside passes by. This study is to compare the way of a linearity and made a certain amount of standard diluted solution which are 1, 6, 12 ㎍/ℓ, and of the samples, we used 6㎍/ℓ to compare the accuracy of the analysis. And the analytical method using SPME and Headspace-GC was conducted with leaving them on room temperature, desorpting them later. Also they were stirred and absorbed subsequently separated from the previous form. Moreover, constantly leaving them in a 50℃ area before separation, and the forth method of the experiment was separating after absorbing through the stirring process. To determine the most efficient way of the minimum detection limits, we diluted a certain amount of standard solution which was 0.03㎍/ℓ, and repeated the experiment 7 times. The results showed the linearity's temperature was stabled in room temperature by SPME, and both stirring method had R²=0.98 or a better result, and with the repeatable method by utilizing SPME stabled with the room temperature and stirring to meet the standard by about 7%, while results showed were the best. So to say, SPME method could achieve best results when calculating properly with a stable temperature in the stirring analysis. Moreover, by using the best analysis of linearity and reproducibility in terms of the minimum detection limits, manufactured 0.03㎍/ℓ standard solution's diluted TMA weight of ingredients were converted to 50L of stock samples and satisfied the standard that is below 0.5ppb with a result of 0.47ppb in the odor detection test. Next, we went into the experiment on the changes of TMA concentration when time passes by that were gathered in a sample extraction method. First, we used Tedlar bags to observe the changes of concentration according to the sample extractionn method, and the other way was conducted by not using Tedlar bags but gathering TMA with sulphuric liquid. The results showed that the experiment using Tedlar bags showed 0.46ppb, while the one without it showed 0.52ppb, in which the difference was negligible but the one without Tedlar bags had a higher density. Also we put the Tedlar bags at a place in a room temperature for 1, 6, 12, and 24 hours to analyse the changes of density. The results showed a slight difference in 6 hours when the figures were rounded up in the second decimal digit, but the density decreased by 50% when they were left for more than 12 hours. By combining the analysed results of sampling method and changes in residence time according to concentration showed that the internal parts of the Tedlar bags had a lost due to absorption of the sample, decreasing the concentration(density) when using the bags. And as the residence time lengthens, the lost amount of samples increases. Since odor is affected by pressure state, the velocity of wind, temperature and weather conditions, we could expect development on much more accurate data analysis method in terms of weather and seasonal changes that require environmental analysis in variables.
The purpose of this research is not utilizing low temperature concentrated-recharged column analysis method of the original TMA but directly injecting a simplified condensed sample that is analysed with SPME equipment and an efficient way to study through Headspace-GC analysing method in terms of linearity and analysis accuracy, and the other is finding the difference of the TMA concentration, setting up the cornerstone of foul odor's environment analysis as the method of sample acquirement and the length of remaining time inside passes by. This study is to compare the way of a linearity and made a certain amount of standard diluted solution which are 1, 6, 12 ㎍/ℓ, and of the samples, we used 6㎍/ℓ to compare the accuracy of the analysis. And the analytical method using SPME and Headspace-GC was conducted with leaving them on room temperature, desorpting them later. Also they were stirred and absorbed subsequently separated from the previous form. Moreover, constantly leaving them in a 50℃ area before separation, and the forth method of the experiment was separating after absorbing through the stirring process. To determine the most efficient way of the minimum detection limits, we diluted a certain amount of standard solution which was 0.03㎍/ℓ, and repeated the experiment 7 times. The results showed the linearity's temperature was stabled in room temperature by SPME, and both stirring method had R²=0.98 or a better result, and with the repeatable method by utilizing SPME stabled with the room temperature and stirring to meet the standard by about 7%, while results showed were the best. So to say, SPME method could achieve best results when calculating properly with a stable temperature in the stirring analysis. Moreover, by using the best analysis of linearity and reproducibility in terms of the minimum detection limits, manufactured 0.03㎍/ℓ standard solution's diluted TMA weight of ingredients were converted to 50L of stock samples and satisfied the standard that is below 0.5ppb with a result of 0.47ppb in the odor detection test. Next, we went into the experiment on the changes of TMA concentration when time passes by that were gathered in a sample extraction method. First, we used Tedlar bags to observe the changes of concentration according to the sample extractionn method, and the other way was conducted by not using Tedlar bags but gathering TMA with sulphuric liquid. The results showed that the experiment using Tedlar bags showed 0.46ppb, while the one without it showed 0.52ppb, in which the difference was negligible but the one without Tedlar bags had a higher density. Also we put the Tedlar bags at a place in a room temperature for 1, 6, 12, and 24 hours to analyse the changes of density. The results showed a slight difference in 6 hours when the figures were rounded up in the second decimal digit, but the density decreased by 50% when they were left for more than 12 hours. By combining the analysed results of sampling method and changes in residence time according to concentration showed that the internal parts of the Tedlar bags had a lost due to absorption of the sample, decreasing the concentration(density) when using the bags. And as the residence time lengthens, the lost amount of samples increases. Since odor is affected by pressure state, the velocity of wind, temperature and weather conditions, we could expect development on much more accurate data analysis method in terms of weather and seasonal changes that require environmental analysis in variables.
주제어
#TMA SPME Headspace-GC
※ AI-Helper는 부적절한 답변을 할 수 있습니다.