I think you mean Wang. It was not an ecig, it was a reactor vessel with glass wool soaked in e-liquid solvents. For temperature data, could be argued to be a good study, and useful. For relating it directly to ecigs, especially new-generation atomizers, I think this is very misleading. The link to the thread you give has a video of John Bellinger's talk at National Academies of Sciences in DC, which I spoke at, as well. Yeah, if you get the liquid hot enough it decomposes. That said, we have looked at several atomizer types at higher wattage, and there are some that are remarkable in not decomposing the e-liquid, even without TC. Currently we are looking at TC with respect to emissions.
But the bottom line, in my opinion, is that if you are producing significant aldehydes you will know it, since it will give a bad taste, at best, or be unvapeable, at worst. Some older models, like the CE4, produce aldehydes at all wattages we looked at, especially above about 7 W. Thus people naturally gravitated away from these to better performing atomizers at higher wattages, and the manufacturers met that demand with atomizers that are very efficient at producing clean vapor. It is hard to find the CE4 now on websites, or else if a vendor has them, they can't give them away, even for $1.50. People don't want them. So naturally, this is the most popular atomizer for researchers to study aldehyde emissions. Sarcasm off. This was one of the points I told the NAS: be very wary of studies on emissions that use older models at high wattage. Consumers are not doing this, and the atomizers were never designed for high wattage. Making statements about the dangers of aldehydes using devices not designed for high wattage, and producing aldehydes at extreme amounts, is simply not addressing current reality, and those levels would never be tolerated by a vaper, even for one puff.
