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Eye spy cyanide
Chemistry World ^ | 3 August 2012 | Francesca Burgoyne poisoning

Posted on 08/05/2012 3:43:52 PM PDT by neverdem

The two-step method to detect cyanide. (A) Adding a chemosensor to a blood sample, followed by extracting the purple chemosensor–cyano complex from the sample. (B) Washing the column with water

The two-step method to detect cyanide. (A) Adding a chemosensor to a blood sample, followed by extracting the purple chemosensor–cyano complex from the sample. (B) Washing the column with water

The colour of cyanide poisoning is purple, according to researchers in Switzerland who have developed a method that enables them to quickly detect blood cyanide levels through a simple colour change. 

Cyanide poisoning as a result of smoke inhalation can have serious or fatal consequences unless an antidote is rapidly administered. Current methods for determining cyanide poisoning, including microdiffusion, microdistillation and liquid chromatography-mass spectrometry detection, can take up to an hour to give results and are not suitable for point-of-care settings.

The method devised by Christine Männel-Croisé and Felix Zelder from the University of Zürich only takes two minutes and does not require any laboratory equipment. A pinprick of blood is taken from the victim and adjusted with a pH9.6 buffer. An orange cobalt-based chemosensor (previously developed by the team) is added, the resulting solution is pressed through a syringe containing a solid phase extraction column and then water is used to flush the blood sample from the column.  If cyanide is present, it will have formed a purple cyano complex with the chemosensor, which is trapped on the top layer of the column and is visible to the naked eye.

What makes this method unique, states Willie Hinze, an analytical chemist from Wake Forest University, US, is that it has all the benefits of previous techniques: the blood sample is very small, commonly used cyanide antidotes don’t interfere with detection, the materials required are simple and the results can be determined by the eye. ‘What I like best about it is there is no CN- releasing step because of the in situ complexation,’ he says. This is a serious disadvantage with previous methods, which require the addition of acid and heating to liberate CN- from the blood sample. This can potentially generate HCN gas, which is not very useful, as Zelder points out.

Not only does the colour of the cyano complex provide an easy identification of cyanide poisoning, it is also quantitatively useful. The intensity of the colour can be used to determine the dose needed, or whether the antidote is taking effect. ‘In principle, this could be done with a cell phone camera,’ says Zelder. The next step is to see whether the method stands up to field testing. Zelder and colleagues are currently in discussion with emergency doctors to try it out in real situations.

References

1. C Männel-Croisé and F Zelder, Anal. Methods, 2012, DOI: 10.1039/c2ay25595b


TOPICS: Culture/Society; News/Current Events; Testing
KEYWORDS: cyanide; cyanidepoisoning; medicine

1 posted on 08/05/2012 3:44:01 PM PDT by neverdem
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To: neverdem

Why did you post this? Andrew Breitbart?


2 posted on 08/05/2012 3:50:26 PM PDT by SatinDoll (Natural Born Citizen - born in the USA of citizen parents.)
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To: neverdem

Yeah. But why?


3 posted on 08/05/2012 3:52:27 PM PDT by Lazamataz (I love the Universe, and it loves me.)
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To: neverdem

And this is relevant to a conservative news forum why?


4 posted on 08/05/2012 3:56:36 PM PDT by SpaceBar
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To: Lazamataz

Because a less than fatal dose can still do a lot of damage.


5 posted on 08/05/2012 3:56:59 PM PDT by JoeDetweiler
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To: neverdem

Hey cut the original poster some slack.

Sheesh.

:D


6 posted on 08/05/2012 3:59:31 PM PDT by Cringing Negativism Network (America doesn't need any new laws. America needs freedom!)
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To: neverdem

Good. Wide spread knowledge of this easy detection technique might reduce the number of “accidental” poisonings...


7 posted on 08/05/2012 3:59:48 PM PDT by null and void (Day 1293 of our ObamaVacation from reality - Heroes aren't made Frank, they're cornered...)
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To: WXRGina; logitech

Bookmark


8 posted on 08/05/2012 4:07:27 PM PDT by WXRGina (Further up and further in!)
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To: El Gato; Ernest_at_the_Beach; Robert A. Cook, PE; lepton; LadyDoc; jb6; tiamat; PGalt; Dianna; ...
How Blasts Injure the Brain

Bacteria-immune system 'fight' can lead to chronic diseases, study suggests

What Makes Bat Viruses So Deadly?

Finished heart switches stem cells off

FReepmail me if you want on or off my health and science ping list.

9 posted on 08/05/2012 4:14:07 PM PDT by neverdem (Xin loi minh oi)
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To: SpaceBar

I can’t imagine how you could have been around FR for over ten years and not know that science, medical and technical postings are common here (although there aren’t nearly enough).


10 posted on 08/05/2012 4:17:53 PM PDT by steve86 (Acerbic by nature not nurture TM)
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To: neverdem

Thanks for posting this. Earlier this year I went to a seminar that discussed how much more toxic fires with modern furnishing can be. There’s some that believe some of the firefighters that were thought to have died from heart attacks may have died from cyanide poisoning instead. A NIOSH report on the deaths of two firefighters showed lethal amounts of both CO and hydrogen cyanide in their blood.

Having a faster test available may save someone’s life. Thanks again. I’ll spread the word.

Modern homes using engineered beams and other non-traditional wood products for structural support burn hotter, faster and collapse faster than the old sick built construction.

The video at the link is a UL test that shows two rooms ignited at the same time. The room on the left has furnishing covered in wool, cotton and silk. The room on the right has furnishings covered with modern petroleum derived fabrics. Some are calling them solidified gasoline. What do you want in your home?

http://www.youtube.com/watch?v=aDNPhq5ggoE


11 posted on 08/05/2012 4:18:06 PM PDT by meatloaf (Support Senate S 1863 & House Bill 1380 to eliminate oil slavery.)
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To: neverdem
Thanks, a very informative and useful post. I have to make a presumptive diagnosis of CN poisoning based upon history, dyspnea and the bright red colour of the gums in a cow or dog. Current laboratory tests are of very little help because the animal will be long dead before I get results. My antidote is methylene blue injected IV...it changes the gum colour to a blue/red but the dyspnea corrects in minutes. Now if only they can get a RELIABLE colourmetric test for antifreeze ingestion that will make a diagnosis in minutes.
12 posted on 08/05/2012 4:19:17 PM PDT by vetvetdoug
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To: JoeDetweiler

Yeah but shouldn’t we be worrying about the virus or bacterium that causes the zombies to reanimate in “The Walking Dead”?


13 posted on 08/05/2012 4:22:15 PM PDT by Lazamataz (I love the Universe, and it loves me.)
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To: Lazamataz

We?? I already am the Walking Dead.

Or, at least, I was last night......


14 posted on 08/05/2012 4:29:09 PM PDT by JoeDetweiler
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To: SatinDoll; Lazamataz; SpaceBar; JoeDetweiler; Cringing Negativism Network; null and void; ...
Why did you post this? Andrew Breitbart?

No. Chemistry was my undergraduate major. I'm a physician. I still like practical chemistry.

meatloaf and vetvetdoug and anyone else, you're welcome.

15 posted on 08/05/2012 4:49:23 PM PDT by neverdem (Xin loi minh oi)
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To: neverdem

Have you seen or read the book, The Poisonner’s Handbook by Deborah Blum?

The title is somewhat misleading, because it is the story of forensic chemistry, it’s developement in NYC during prohibition. Great reading!

Though I am an Art Historian by education and training, I’m a pure science enthusiast interested in geology and astrophysics.


16 posted on 08/05/2012 4:55:39 PM PDT by SatinDoll (Natural Born Citizen - born in the USA of citizen parents.)
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To: neverdem

Thanks for posting, ND. I always read with interest the articles on medicine, disease, technology, aviation, aerospace, physics, engineering, etc. I don’t read technical journals any more, so this is a great way to learn about new advances.

I had no idea that modern petroleum based fabrics lead to CN poisoning via smoke inhalation.


17 posted on 08/05/2012 5:20:13 PM PDT by ProtectOurFreedom
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To: neverdem
I always thought the cyano- radical was fairly reactive. It shouldn't be hard to take it up and form some kind of colored complex with something like an aniline derivative or even ammonia, I wouldn't think.

But it's been a long time since college Organic lab ...

18 posted on 08/05/2012 6:00:23 PM PDT by IronJack (=)
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To: neverdem

...and we need to know this... why?


19 posted on 08/05/2012 6:41:22 PM PDT by publius911 (Formerly Publius 6961, formerly jennsdad)
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To: ProtectOurFreedom

It’s a bigger problem than is widely known. It’s also the reason I tell people to get out of a burning house ASAP and assemble the family upwind of the smoke. And never go back in. You’ll die.

http://www.firefightercancersupport.org/items/Library_PFDCyanideReport.pdf

This article mentions hydroxocobalamin which apparently can be carried by fire companies and used on scene.

http://my.firefighternation.com/profiles/blogs/changing-the-conversation


20 posted on 08/05/2012 6:41:22 PM PDT by meatloaf (Support Senate S 1863 & House Bill 1380 to eliminate oil slavery.)
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To: neverdem
What about the Walking Dead virus.

They blew up the CDC in the last episode of TWD, so no help from them.

Get busy, doc!

21 posted on 08/05/2012 6:47:08 PM PDT by Lazamataz (I love the Universe, and it loves me.)
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To: neverdem

Thank you for another interesting post.


22 posted on 08/05/2012 7:39:00 PM PDT by Lawdoc (My dad married my aunt, so now my cousins are my brothers. Go figure.)
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To: publius911
...and we need to know this... why?

Read the comments. Some of them express appreciation from a firefighter and a veterinarian.

23 posted on 08/05/2012 8:34:06 PM PDT by neverdem (Xin loi minh oi)
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To: neverdem; publius911

This is something we should be very aware of. The aerosol form is a tool for assassination as it appears to be a heart attack.

Can this method detect that?


24 posted on 08/06/2012 7:17:48 AM PDT by 1010RD (First, Do No Harm)
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To: 1010RD
Can this method detect that?

It only confirms cyanide ions in blood, not the method used in getting it there.

25 posted on 08/06/2012 2:52:53 PM PDT by neverdem (Xin loi minh oi)
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