Ion Trap Mass Spectrometry

[Seden]

In looking at the Minero detector with it's ion trap detector,makes me wonder if the idea came from a Ion Trap mass Spectrometer. The missing piece of the puzzle is the source of ionization.

I think I mentioned earlier in the March 7th,2007 edition of EE Times is an article called "Star Trek's 'tricorder' realized where Purdue University combined a mass spectrometer with a desorption electrospray ionization source. Out of my league to be sure and something Carl would have to really explain. But the good news it they predict once the unit gets in production should be around $2,000 (much cheaper than a minero) but has a very short range and can identify just about anything accurately.
Now there's the challenge to make a LRL mass spectrometer.

Randy

Hi Seden,

Ion Traps only work in zero air.

Read up on it.

Otherwise ions react quickly

[give up electron] and

cannot be stored up.

Search Ion Mobility Spectrometry.

in air deal.

Hard to get good resolution

trying to get a spectrum

by gating and seperating

ions by accelerating in electric field.

Also lots of crap in outside air

from burned automobile gas

additives. [and you are worryed about

second hand smoke, he he].

Unless someone pulls a bunny

out of a hat.

I would say lost cause.

mho

[Seden]

I was just thinking out loud wondering if Alanso and company were trying to imitate Mass Spectrometry with the Ion Sensor in their detector. Good points though and thank you.

No,what I think would be worthwhile pursing is Spectral Induced Polarization which according to Heikka Vanhala's Doctoral Dissertation that he sent me a copy of, can determine what mineral or metal is by it's grain size. What puzzles me is how such a low frequency can detect grain size. Seems like something that should be up in the 100+GHZ range, not .01-1000hz!
One of these days if I can get up the nerve to write him or that very beautifull Scientist Erika Gasperikova how this can be and if it could be used to detect small objects like coins. Having said that in the book "Looking into the Earth" Chap.23 "Exploration of Metalliferous Ores"sub chap."The formation of ores and their geophysical properties" states "The ore is usually dense,conducting, and magnetic,but if it is disseminated IP is likely to be a better geophysical technique than gravity,resistivity,or e-m". Again Carl would probably be the one to comment on this given his educational background,seems hopefull though,but hey what do I know?
Randy

[Rudy]

Last I heard, precious metals like gold, or platinum, or silver, do not spontaneously gassify or vaporize by themselves. So what's the point about using the technique in an LRL?

OK, I agree! Good points!
Regards!

[Qiaozhi]

Originally Posted by Seden

In looking at the Minero detector with it's ion trap detector,makes me wonder if the idea came from a Ion Trap mass Spectrometer. The missing piece of the puzzle is the source of ionization.
Randy

It's more likely that the Mineoro detector came from an idea associated with wallet mining. There was no scientific thought process involved.

[Seden]

You made my point-Thank You! Like I said, the source of Ionization is the missing puzzle here. If someone from Mineoro is reading this I'd like them to respond to enlighten us all the purpose of the unsealed ionization chamber.
Has anyone been able to get into the microchip in the Mineoro to read the code,must be a way to get into it.
With all the talented EE's on here somebody should be able to hack the code for it. That should be priority one in getting to the bottom of this thrashed to death topic of Mineoro detectors and ending it once and for all.

Randy

[Qiaozhi]

Originally Posted by Seden

You made my point-Thank You! Like I said, the source of Ionization is the missing puzzle here. If someone from Mineoro is reading this I'd like them to respond to enlighten us all the purpose of the unsealed ionization chamber.
Has anyone been able to get into the microchip in the Mineoro to read the code,must be a way to get into it.
With all the talented EE's on here somebody should be able to hack the code for it. That should be priority one in getting to the bottom of this thrashed to death topic of Mineoro detectors and ending it once and for all.

Randy

You're making a huge assumption here. Gold does not produce ions.

[Seden]

In Google, type in "Inductively Coupled Plasma Mass Spectrometer with Laser Abalation metal ions release detection in the human mouth" Proc. SPIE Vol.4610 pg.170-177.

Randy

[Qiaozhi]

Originally Posted by Seden

In Google, type in "Inductively Coupled Plasma Mass Spectrometer with Laser Abalation metal ions release detection in the human mouth" Proc. SPIE Vol.4610 pg.170-177.

Randy

OK, I've done that - but...
This paper refers to alloys used in dentistry, and the detection of metal elements in the saliva is the subject of the study. It also appears that you need to be a subscriber to get the full paper, and the abstract does not specifically mention gold ions. Although, it is true that ionic gold in the form of gold chloride is toxic to humans, this is different to metallic gold. Perhaps someone who is more familiar with dentistry can tell us the exact mixture used for gold fillings.
Anyway, pure metallic gold does not produce ions. Not even if you bury it for a million years.

In the event that we don't have any dentists lurking here, I did a quick search:

Gold fillings have excellent durability, wear well, and do not cause excessive wear to the opposing teeth, but they do conduct heat and cold, which can be irritating. There are two categories of gold fillings, cast gold fillings ( gold inlays and onlays ) made with 14 or 18 kt gold, and gold foil made with pure 24 kt gold that is burnished layer by layer. For years, they have been considered the benchmark of restorative dental materials. Recent advances in dental porcelains and consumer focus on aesthetic results have caused demand for gold fillings to drop in favor of advanced composites and porcelain veneers and crowns. Gold fillings are usually quite expensive, although they do last a very long time. It is not uncommon for a gold crown to last 30 years in a patient's mouth.

So it appears that amalgams are the real problem, and gold is preferred because of its durability and safety.
I really cannot comment any further unless you have the full paper available.

[Carl-NC]

Originally Posted by Seden

Has anyone been able to get into the microchip in the Mineoro to read the code,must be a way to get into it.

If the protection fuse has been blown (and I assume it surely has) then the only way is to decap the part and re-deposit the fuse metal using a focused ion beam (FIB) machine. I've used a FIB service in Raleigh several times, but it's very expensive, and they might not agree to FIB a microcontroller fuse.

- Carl

In its simplest form an IMS system measures how fast a given ion moves in a uniform electric field gradient through a given atmosphere. The molecules of the sample need to be ionized, usually by corona discharge, atmospheric pressure photoionization (APPI), electrospray ionization (ESI), or a radioactive source, eg. a small piece of 63Ni or 241Am, similar to the one used in ionization smoke detectors.

you can get Americium from smoke detectors

for an ionization source

otherwise radioact stuff is off limits for most of us.

here are some links

I know alot about this stuff.

Homeland Security Money

I designed the electronics for several companies.

No I can't give you the schematics.

The gating of ions at high voltage is trick

and the amplifiers/eletrometers for low noise

is somewhat tough, but nothing you guys couldn't

cook up on your own. The high voltage is 3000 to 10,000

but not much current is required so you can even do this

somewhat safely.

Lots of money in this game for

the detection of xplosives, dangerous chemicals, etc.

http://en.wikipedia.org/wiki/Ion_mobility_spectrometry

http://www.ornl.gov/sci/lsm/mimspec.html

http://trace.smithsdetection.com/Lif...asp?Flash=True

To detect telltale traces of chemicals that evaporate from the surfaces of these substances, security agents rely on various kinds of chemical "sniffers". Ion mobility spectrometers are among the most commonly used instruments for this purpose.
The ion mobility spectrometry (IMS) technique separates and detects electrically charged particles (ions) that have been sorted according to how fast they travel through an electrical field in a tube. Small ions travel very fast, and they reach the detector first, with successively larger ions following along behind.
The process starts when a security officer wipes an absorbent swab over a person's clothing or luggage, then inserts the swab into a small heated chamber. (ACS employee Kevin McCue wrote an amusing account of this experience in a previous chemistry.org feature.) Inside the chamber, traces of organic compounds that the swab has picked up evaporate and mix with a carrier gas that is swept into the main part of the instrument.
Inside the instrument, a radioactive substance, commonly 63Ni, is housed in a small chamber that is shielded from the outside, but accessible to the inside of the instrument. This radioactive source constantly gives off high-energy electrons, which collide with the sample molecules and the carrier gas to form ions.


http://www.chemistry.org/portal/a/c/...6a17245d830100

There are also many patents

on this technology. It can indeed detect metals

in atomic form in the air.

If they are they there.

You can do it for real.

My guess is the unit under discussion

is a poor replica, but maybe enough to keep

out of jail. otherwise the gold will have to be

pre ionized and suspended in air.

[Seden]

Now that's a post I really appreciate,real technology and possible experiments. Thanks much my friend!

Randy