Sunstealer:
Although I understand your strict attitudes, I do not agree that soaking of chips in e.g. MEK solvent is meaningless. This is also why even Millette replicated these "tests". They can show e.g. whether the binder is linear (soluble) or crosslinked (insoluble) polymer. But, when the polymer is identified as epoxy resin using FTIR, it can be only the crosslinked one (it means that it can not be dissolved and can be at most swollen/softened by any solvent, depending on the actual degree of crosslinking).
One of the reasons for my strictness* is to try to get laymen, especially truthers, to understand that there are certain methods and procedures that give definitive answers to the question, "what is this material?"
You and I know that there is information to be gained from carrying out any scientific test, but only if it's done properly and only if the limitations of the method are known.
I have a number of problems with the MEK test:
The first is that it can only tell you so much as you've pointed out. The second is that there are other methods available that give positive identification of the organic binder, which means this is a superior method. There is no point wasting time or energy on a limited method when you have at your disposal a method that provides the exact answer unless it's used as very quick supplementary test.
Thirdly we have no idea which materials were soaked apart from one chip identified through SEM EDX ,which laughably isn't the same material as other chips shown in the paper.
Lastly, because the test has limitations and cannot identify which polymer is present, then it gives truthers leeway to discuss things which they have no experience or knowledge of. They keep the discussion going round in circles by talking about swelling and the behaviour of various unidentified paints soaked in MEK, all of which is of no substance when looking to identify the material.
In the critique linked by Chris they go through the usual non-argument of MEK chip contamination, desperately trying to explain away the irrefutable difference between EDX spectra of the red layer in chips a-d and the red layer in the MEK soaked chip. All the while ignoring the highlighted part of the statement that accompanies Fig 14:
Fig. (14). XEDS spectrum of red side before soaking in MEK. Notice the presence of Zn and Cr, which are sometimes seen in the red layers. The large Ca and S peaks may be due to surface contamination with wallboard material.
Truthers, including the authors of the paper, have no answers for the presence of Zn and Cr.
- Why is Zn and Cr present?
- What is the purpose of Zn and Cr in thermite?
- Is Zn and Cr contamination? If so, show how.
- Why are Zn and Cr only present in some chips but not others?
- Why, if military grade super-nanothermite can only be produced in laboratories, is the process control so poor?
On the other hand, us debunkers with technical knowledge and experience, know that zinc chromate is used in paints and coatings as a corrosion inhibitor. The fact that both these elements are present along with other well established pigment particles strengthens the case for paint.
The fact that both these elements are present in some chips, but not others, shows that there are more than one type of red layer. If that is the case then there is more than one material, which supports several conclusions:
1. The MEK soaked chip is a different material to chips a-d because chips a-d show no presence of Zn accompanying Cr, instead Sr and Cr are present indicating a different corrosion inhibitor was used. (Note that Fig 7 EDX spectra are not detailed enough to identify the presence of Sr or Cr, that information was obtained elsewhere.)
Therefore there is no consistency across the chips tested and therefore the conclusion that all chips are the same material is wrong. This also means that any singular, specific material conclusion, thermite or otherwise, is wrong.
2. The authors of the paper either didn't know what they were doing, are purposely deceiving and therefore fraudulent or both. Why did they decide to drop the FTIR data and analysis from the paper, which is a far superior method?
Why didn't they just perform the simple MEK test and conclude that the binder was crosslinked due to insolubility rather than use the valuable space, in an already over-long paper, to wax lyrical about a moot test?
Instead us debunkers have the wherewithal to realise that more than one red paint is going to be present in dust gathered from the WTC event. A fact that even today truthers can't understand (see ergo's post 2 above this one). The fact that we see evidence for the presence of two different corrosion inhibitors in two different chips strongly suggests the presence of two different paints. We struggled with trying to identify another known paint other than Tnemec Red that was used on the WTC until Ivan Kminek pointed out Laclade red joist primer paint. This is a very strong candidate for chips a-d.
Truthers simply chose to ignore the direction in which all the evidence is pointing. They also chose to ignore the promises made in the paper they champion.
The Gash report describes FTIR spectra which characterize this energetic material. We have performed these same tests and will report the results elsewhere. We note that polymers in the matrix may be responsible for absorption of MEK and the subsequent swelling which we observed[29].
Where are the results of the FTIR analysis? Why after 4 1/2 years has this information never been presented? How difficult is it to post it on a truther website? Is it because it doesn't support the thermite conclusion and in fact shows the Harrit et al paper up for what it is? What have they got to hide?
But hey, lets ignore the important points and instead talk about "paint" and swelling whilst writing rubbish like this that has already been shown to be false:
And the team discovered that MEK paint-solvent induces swelling in their chips that segregates the silicon from the aluminum, which proves that they are not chemically bound together, so the plates in their chips are not kaolin
* Other reasons for strict tone include: professionalism, exasperation and grumpy old man syndrome.