Attack Khan
© The New Indian Express
Those who blame the Syrian government for the allegedly chemical incident in Khan Sheikhun are now pushing the analysis of the Organization for the Prohibition of Chemical Weapons (OPCW) to the front. But the results of the OPCW tests are inconsistent with the observed technical and medical facts of the incident.

The OPCW Director General Ambassador Üzümcü, a Turk, yesterday released its first results of his organization:
The bio-medical samples collected from three victims during their autopsy were analysed at two OPCW designated laboratories. The results of the analysis indicate that the victims were exposed to Sarin or a Sarin-like substance. Bio-medical samples from seven individuals undergoing treatment at hospitals were also analysed in two other OPCW designated laboratories. Similarly, the results of these analyses indicate exposure to Sarin or a Sarin-like substance.

Director-General Üzümcü stated clearly: "The results of these analyses from four OPCW designated laboratories indicate exposure to Sarin or a Sarin-like substance.
That's "Sarin or Sarin-like substance" three times a row. Sarin is also mentioned in the headline. Someone is pushing that meme hard.

But the OPCW did not conclude that a chemical attack occurred in Khan Sheikhun. It suggested nothing about the incident itself. Instead it talked about bio-medical samples - nothing more, nothing less.

A "Sarin like substances" could be a different chemical weapon than sarin - soman is possible. But many general insecticides belong to the same chemical class as sarin and soman. They are organophosphorus compounds. (Sarin was originally developed as insecticide). All of such compounds could be a source of the exposure found by by the OPCW. These chemicals tend to degrade within hours or days. A forensic analysis will not find the original substance but only decomposition products of some organophosporus compound. That is the reason why the OPCW result is not fixed on sarin but also mentions "sarin like substances".

The question is now where those samples come from? And what is the chain of evidence that connects the samples to the incident in question. The OPCW has not sent an investigation team to Khan Sheikhun. No samples were taken by its own inspectors. While Russia and Syria have asked for OPCW inspections on the ground, Tahrir al-Sham, the renamed al-Qaeda in Syria which controls the area, has not asked for inspectors. Without its agreement any investigation mission is simply too dangerous. None of the OPCW inspectors are interested in literally losing their heads to those terrorists.

Immediately after the incident bodies of dead and wounded were brought to Turkey where they were taken into hospital. Al-Qaeda or al-Qaeda aligned personnel must have transported these. It is a three-hour trip from Khan Sheikhun to the Turkish border. Unless we trust the words of al-Qaeda operatives we cannot be sure that the corpses delivered were indeed from Khan Sheikhun.

The incident happened on April 4. An immediate OPCW statement on April 4 referred to chlorine, not sarin or similar:
The OPCW is investigating the incident in southern Idlib under the on-going mandate of the Fact-Finding Mission (FFM), which is "to establish facts surrounding allegations of the use of toxic chemicals, reportedly chlorine, for hostile purposes in the Syrian Arab Republic".
The UN Security Council convened on April 6 to discuss the incident. The Turkish newspaper Hurriyet reported:
Turkey sent a report to the United Nations just before a U.N. Security Council meeting to address accusations that the Syrian government staged a chemical weapons attack on April 4, stating that the gas used in the attack was chlorine gas.

Turkey's Chemical, Biological, Radiological and Nuclear teams (KBRN) prepared an initial report over the possible material of the alleged chemical attack, relying on the symptoms of and tests conducted on the victims and their testimonies.

The report stated that the initial findings of the tests conducted on around 30 victims brought to Turkey for treatment pointed to a chlorine gas attack.
Thirty victims were immediately brought to Turkey after the incident. But the Turkish doctors and CBRN specialist did not consider sarin, but chlorine gas -a much less potent chemical- to be involved. (Chlorine is not designated a chemical weapon under the various chemical warfare regulations. This fact is often obfuscated for pure propaganda reasons.) The symptoms of chlorine ingestion and the effects of sarin exposure are quite different. It is extremely unlikely that the emergency doctors and chemical weapon specialists have misdiagnosed the issue when the patients arrived and were taken care of. The 30 casualties arriving in Turkey were not the casualties of a sarin incident.

But the Turkish Health Ministry told a different story:
The poison used in the deadly chemical bomb attack in a rebel-held part of northern Syria this week was the banned nerve agent sarin, the Turkish Health Ministry said in a statement on Thursday.
...
"According to the results of preliminary tests," the statement said, "patients were exposed to chemical material (Sarin)."
...
The Turkish statement did not elaborate on how the sarin had been identified in the assault on Tuesday, but it said some of the telling symptoms seen in the victims included "lung edema, increase in lung weight and bleeding in lungs."
From the CDC Emergency Response Database:
At high exposure levels, irritation of the upper respiratory tract and accumulation of fluid in the lungs (pulmonary edema) contribute to a sensation of choking.
But that is from the CDC entry for Chlorine.

The CDC entry for Sarin mentions "fluid accumulation in the airways" as one symptom among many more conspicuous ones. It does not mention an edema of the lungs.

Contradicting the first Turkish reports the Turkish Health Ministry claimed "sarin" (in parenthesis?!). But the symptom it described as proof was not of sarin but of chlorine exposure.

The Turkish Justice Minister also made a statement but that did not mention sarin at all
Turkish Justice Minister Bekir Bozdag told reporters that "Autopsies were carried out on three of the bodies after they were brought from Idlib. The results of the autopsy confirms that chemical weapons were used," quoted by state-run Anadolu news agency.

"This scientific investigation also confirms that Assad used chemical weapons," Bozdag added, without giving further details.
...
Bozdag said autopsies were conducted with the "participation" of officials from the World Health Organization (WHO) in the southern province of Adana together with officials from Organisation for the Prohibition of Chemical Weapons (OPCW).

But WHO immediately countered Bozdag's claims that it was involved in the postmortem, saying the organisation did not conduct autopsies, adding: "It is not our mandate."
...
[It] also stressed that no samples or swabs had been taken by WHO despite claims by the Adana prosecutor that "examples" had been sent to the organisation and the OPCW.
The Justice Minister claimed that samples had been given to the WHO and OPCW from the very first autopsies. But the WHO clearly denies that. I find no OPCW statement on this.

In 2013 a Turkish court, under Justice Minister Bozdag, set one suspected Ahrar al Sham member free after he was caught with sarin precursors. The person was later sentenced in absentia as he had fled back to Syria. Ahrar al Sham, while not in charge, has a presence in Khan Sheikhun.

The neuroscientist and neuro-pharmacologist Denis O'Brien, a Ph.D. with a research and teaching career in that field, analyzed the symtoms of the casualties that were depicted in the various videos coming out of Khan Sheikhun. His diagnostics and chemical-biological explanations are humorously titled Top Ten Ways to Tell When You're Being Spoofed by a False-Flag Sarin Attack.

O'Brien notes the total absence of feces, urine, vomit and cyanosis (turning blue) in the videos. Sarin exposure causes, according to the CDC database "Nausea, vomiting (emesis), diarrhea, abdominal pain, and cramping." Sarin affected patients would have spontaneously shit, peed and vomited all over. But the casualties in the videos, even the "dead" ones, have clean undies. The "clinic" in the videos has clean floors. The patients show red skin color, not oxygen-deprived blue. The patients in the videos were not affected by sarin.

Medical personal and rescue workers in the videos (example) and pictures also show none of the typical sarin symptoms. Sarin degrades relatively fast. Half of the potency will be gone within five hours after release (depending on environmental factors). But these rescue workers and medical personal were immediately involved with the casualties. They do not wear any reasonable protection. They would have been dead or at least affected if sarin would have been involved in any relevant concentration.

The Turkish doctors and chemical weapon specialists who received the first patients diagnosed chlorine exposure, not sarin. The first Turkish reports to the UN speak of chlorine, not sarin. It is only the Turkish Health Minister who mentions sarin - in parentheses, but then lists a symptom of severe chlorine exposure as one of sarin. Neither the casualties nor the unprotected medical personal involved in the incident show any effect of sarin exposure.

Fifteen days after the incident the OPCW say that samples it was given(!) "indicate exposure to Sarin or a Sarin-like substance".

Turkey has been the supply and support lifeline for Ahrar al Sham as well as for al-Qaeda in Syria. The samples given to the OPCW were taken by Turkish personnel in Turkey. The current head of the OPCW is a Turkish citizen. It is in the interest of Turkey and its terrorist clients in Syria to blame the Syrian government for chemical weapon use.

The medical and technical evidence is not consistent with a sarin attack by the Syrian government. All of the videos and pictures of the incident were taken in al-Qaeda-controlled territory. All witnesses were under al-Qaeda control. How much of the incident was staged for videos (see al-Qaeda doctor video linked above) or how many of the witnesses were told to lie is not testable under current circumstance. The Syrian government insist that it has given up all its chemical weapons. The Russian government also asserts that no chemical weapon attack took place.

The OPCW analysis may well have found that samples it received indicated organophosphorus exposure. But the chain of evidence for these samples is very dubious.

The observable facts of the incident on the ground do not support the conclusion that sarin was present in the Khan Sheikhun incident.

Note: Part of the above is based on the work and tweets of Ali Ornek