19 Questions 13 Answers 0 Followers
Questions related from Kim Soonho
Hello. I have a question about the relationship between surfactants and solid raw materials. For example, if we buy Caffeine (CAF), the caffeine is solid state. Therefore, we use the CAF solution...
25 January 2022 8,851 0 View
Hello. I'm curious about the pKa of DEET(C12H17NO). As I know, pKa means how weak or strong an acid is. However, DEET has no carboxyl function or H giving position. Can you help and explain...
25 January 2022 1,777 1 View
Greeting, I'm studying some gasification. In one paper, I found the lower heating value (LHV) which can be expressed by LHV = 10.78H2(%) + 12.63CO(%) + 35.88CH4 (%) + 56.5C2H2 (%) + 64.5C2H6 (%)...
25 October 2021 8,920 3 View
Hello. As we read some papers, there is a comparison of electron density between thermal plasma (TP) and non-thermal plasma (NTP). And there, Electron density is higher in the case of thermal...
20 October 2021 8,456 10 View
Hi. I'm analyzing the unknown solution, where there are NO2- and NO3- together. In the case of NO2-, I could measure it by Griess test. And then, I tried to measure NO3- by HPLC with 210 nm....
08 October 2021 1,083 4 View
If the temperature of the caffeine solution (about 5-10 g/L) is going up to about 100-150 degrees, the bubble-like foam is much generated. Is there a reason? is it related to surface tension or...
21 May 2021 4,414 7 View
Hello. I wrote this for getting some help with ESI-MS. In the MS mode (not MS/MS), even though I set the collision energy, it didn't affect the molecules or affect? In that, fragments can be...
17 March 2021 4,014 13 View
Hi, everyone. I'm a starter to write a paper by Latex. But I have some difficulty using it. I'm writing the paper with 2 columns. And, there is one figure that occupies the 2 both-sides. I want to...
27 February 2021 4,023 3 View
Greeting. I have a question about collision energy in ESI-MS. As you know, there is a collision energy(CE) setting for making product ion or fragments from the parent ion. During this process, can...
10 February 2021 1,078 14 View
In general, syngas from gasification or steam reforming, etc, can generate H2, CO, CO2, and/or CH4. However, many papers compared only H2/CO. Therefore, I want to know the reason why H2/CO2 is not...
01 January 1970 2,331 3 View
Hello. I can't understand exactly the difference between capillary voltage and cone voltage.. I mean that the function of them. I read some papers about ESI-MS, and some papers showed as...
01 January 1970 418 3 View
Nice to meet you. I'm doing ESI-MS analysis and read some papers about Na ion. However, there is no description of Na. Therefore, I want to ask where the Na is from. Can you answer me?... Thank...
01 January 1970 396 7 View
Hello. I wanna ask one thing to everyone. 1. Formation of nitrite I did griess test for check nitrite(NO2-) in the solution. However, i couldn’t find the reason how they were formed. actually, my...
01 January 1970 4,728 6 View
Hello. I wanna ask you 'Rate constant (k)'. I read a paper about the synthesis of NOx. At that time, I was curious about the relation between k and reaction rate? Here, (7) reaction shows 10^-11...
01 January 1970 556 5 View
Hi. I want to ask and discuss one thing about Gas chromatography. Actually, I want to know whether it is possible to detect the NO2 gas by the GC-TCD. If not, how can we detect the NOx gases? by...
01 January 1970 6,667 1 View
Hello. Suddenly, I was curious about the reason why the C-C bond has stronger bond energy than that of the C-N bond? As I know, N has a higher electronegativity than C. Moreover, the bond length...
01 January 1970 7,755 0 View
Hi. I wanna discuss with you the difference between Solubility and Ionization in the solution. For example, Salicylic acid (SA) has very low solubility in water. However, it is a strong acid,...
01 January 1970 5,813 3 View
Hello. I want to ask and discuss one thing about Cl2 gas detection. Is there a method to detect and measure Cl2 gas quantitatively? How about gas chromatography? Or the existence of only Cl2 gas...
01 January 1970 142 0 View
Nice to meet you. I wanna try to measure NO, NO2 and NO3 in unknown liquids. After searching for some information, I found that the Griess test is for NO2 detection. Is this right? And then, how...
01 January 1970 4,306 0 View
