Forensics C

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Re: Forensics C

Postby Jim_R » December 13th, 2009, 2:17 pm

Discussion for Forensics C.
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Forensics C

Postby pirate_capn38 » December 13th, 2009, 2:17 pm

Hey, would anyone know where to find a conductivity tester for Forensics C? It says in the rules you're allowed to bring in anything as long as it's 9V but the conductivity tester my school has measures in ppm not micro-Siemens. It seems it would show up in water qual to find ions in solution. I haven't been able to find one at a reasonable price, though.

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Re: Science Crime Busters B / Forensics C

Postby jazzy009 » December 22nd, 2009, 6:17 am

Rules say you can't use anything that runs on AC current after the conductivity tester, can we use a digital thermometer?
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Re: Science Crime Busters B / Forensics C

Postby pirate_capn38 » December 28th, 2009, 10:03 am

jazzy009 wrote:Rules say you can't use anything that runs on AC current after the conductivity tester, can we use a digital thermometer?


I believe the AC current requirement was referring specifically to the conductivity tester. The digital thermometer doesn't seem like it'd be prohibited, but I'd ask a rules clarification if I were you.

I'm still searching for a cheap DC current conductivity tester that measures in micro-Siemens. Any suggestions are greatly appreciated, thanks!
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Re: Science Crime Busters B / Forensics C

Postby Flavorflav » December 28th, 2009, 4:14 pm

I don't think a clarification is necessary, unless your digital thermometer plugs into the wall.

ETA: I guess it couldn't hurt, though.

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Re: Science Crime Busters B / Forensics C

Postby jazzy009 » January 4th, 2010, 10:15 am

I asked the person running forensics at our state comp and she said a digital thermometer is okay.
As for conductivity testers all I have is the blinking 9v one standard in science classes...meh
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Re: Science Crime Busters B / Forensics C

Postby ravensrunner14 » January 4th, 2010, 3:09 pm

so what do you think is the easiet/quickest way to test all the powers they give you? :)
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Re: Science Crime Busters B / Forensics C

Postby jazzy009 » January 4th, 2010, 5:06 pm

ravensrunner14 wrote:so what do you think is the easiet/quickest way to test all the powers they give you? :)


So many ways to sarcastically bash your sentence........ :P meh first off, I like black, font that is.

Anyways, I start with Solubility and as long as you make a flow chart it goes pretty swimmingly from there (get it? flow, swimmingly...hahaha)

Now that I'm amused, dead giveaways for a single powder are not good to try as a starter because it's a waste of chemicals and powder, you want to be able to evenly separate powders into "families" until they are in families of 2 or 3 before you do dead giveaways.
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Re: Science Crime Busters B / Forensics C

Postby 2win » January 9th, 2010, 9:08 pm

i thought thermometers weren't allowed?
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Re: Forensics C

Postby aubrey048 » January 12th, 2010, 1:54 pm

Is there any book that anybody knows of that has info on how to test powders? I'm not very familiar with forensics (I'm a first-time Olympian) and I'm having trouble figuring our the powders. Anyone have any helpful websites?
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Re: Forensics C

Postby kjhsscioly » January 13th, 2010, 3:59 pm

this is a good site, right off the SO website. However, i cannot attest to the accuracy of the information, you may decide to actually do the tests on each chemical.

http://soinc.org/sites/default/files/uploaded_files/forensics/For_ForQual.pdf

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Re: Forensics C

Postby jazzy009 » January 14th, 2010, 5:52 pm

That's from the Benevolent Lin. On the SciO board for Chemistry. She knows what she's doing ;)
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Re: Forensics C

Postby kjhsscioly » January 14th, 2010, 6:49 pm

I am not so sure. My partner tells me that some of the info is slightly off

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Re: Forensics C

Postby jazzy009 » January 15th, 2010, 4:23 am

kjhsscioly wrote:I am not so sure. My partner tells me that some of the info is slightly off

Which ones? I don't agree with some of the Benedict's reactions but that's just my preference for flow charting...
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Re: Forensics C

Postby kjhsscioly » January 15th, 2010, 6:13 pm

the team did the tests last year... i am not sure which ones are wrong


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