I have always used a line and while I have never been to Nats I see no reason for it not being allowed. To my knowledge there is no rule about how you perform your chromatography tests. As far as general advice goes, practice, practice, practice. The more you practice the quicker and easier things will be. Also make sure to save enough time for the analysis at the end of the test. Feel free to ask if you have any other questions.KS_1618 wrote:I just had a question regarding chromatography for Crime Busters B; I haven't done this event at Regionals or States, so I'm somewhat inexperienced. I was practicing chromatography at home, and realized that drawing a line using the ink given for each of the suspects was more effective than simply placing a dot of the ink on the chromatography paper. Although the RF values and the distances traveled by the mobile and stationary phases is the same regardless of whether the ink is present in a line or a dot, I wanted to make sure that using a line was permissible. Would using a line, rather than a dot, be permissible at the National level competition? Additionally, do you all have any tips about Crime Busters in general?
Thanks.
Crime Busters B
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Re: Crime Busters B - Chromatography
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Re: Crime Busters B - Chromatography
I can confirm that there is no such rule. Have fun.Panda Weasley wrote:I have always used a line and while I have never been to Nats I see no reason for it not being allowed. To my knowledge there is no rule about how you perform your chromatography tests. As far as general advice goes, practice, practice, practice. The more you practice the quicker and easier things will be. Also make sure to save enough time for the analysis at the end of the test. Feel free to ask if you have any other questions.KS_1618 wrote:I just had a question regarding chromatography for Crime Busters B; I haven't done this event at Regionals or States, so I'm somewhat inexperienced. I was practicing chromatography at home, and realized that drawing a line using the ink given for each of the suspects was more effective than simply placing a dot of the ink on the chromatography paper. Although the RF values and the distances traveled by the mobile and stationary phases is the same regardless of whether the ink is present in a line or a dot, I wanted to make sure that using a line was permissible. Would using a line, rather than a dot, be permissible at the National level competition? Additionally, do you all have any tips about Crime Busters in general?
Thanks.
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Re: Crime Busters B
I read that the same supervisor has run this event for a while at Nationals, so does anyone know what to expect on the test?
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Re: Crime Busters B
I believe said event supervisor (Scott Holdren) no longer runs the event (not certain though).KSSOISLIT wrote:I read that the same supervisor has run this event for a while at Nationals, so does anyone know what to expect on the test?
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Re: Crime Busters B
In my experience, the national tests incorporate almost everything that is included in the Crime Busters "syllabus" (powders, metals, liquids, chromatography, fiber analysis, hair analysis, etc.) One part of the nationals test that was new to me was the use of a crime scene sketch (a diagram showing the location of the unknowns found in the crime scene). The diagram is intended to help accuse a suspect.KSSOISLIT wrote:I read that the same supervisor has run this event for a while at Nationals, so does anyone know what to expect on the test?
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2015 States: Crime Busters-2nd, Green Gen-2nd
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Re: Crime Busters B
In my experience, the national tests incorporate almost everything that is included in the Crime Busters "syllabus" (powders, metals, liquids, chromatography, fiber analysis, hair analysis, etc.) One part of the nationals test that was new to me was the use of a crime scene sketch (a diagram showing the location of the unknowns found in the crime scene). The diagram is intended to help accuse a suspect.KSSOISLIT wrote:I read that the same supervisor has run this event for a while at Nationals, so does anyone know what to expect on the test?
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2014 States: R&M-4th, Sounds of Music-5th
2015 States: Crime Busters-2nd, Green Gen-2nd
2015 Nationals: Green Generation-1st
2015 Swap Meet: Cheese Hat
2016 States: Green Gen-1st, Exp Des-5th, Scrambler-6th
2016 Nationals: Green Generation-1st
2014 States: R&M-4th, Sounds of Music-5th
2015 States: Crime Busters-2nd, Green Gen-2nd
2015 Nationals: Green Generation-1st
2015 Swap Meet: Cheese Hat
2016 States: Green Gen-1st, Exp Des-5th, Scrambler-6th
2016 Nationals: Green Generation-1st
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Re: Crime Busters B
Thanks a lot, and sorry for not having responded earlier! Do you guys know of any websites from which my partner and I can practice analyzing tracks and spatters? Thanks once again.
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Re: Crime Busters B
This website might help: http://scioly.org/wiki/images/c/cd/Crim ... sheets.pdfKS_1618 wrote:Thanks a lot, and sorry for not having responded earlier! Do you guys know of any websites from which my partner and I can practice analyzing tracks and spatters? Thanks once again.
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2014 States: R&M-4th, Sounds of Music-5th
2015 States: Crime Busters-2nd, Green Gen-2nd
2015 Nationals: Green Generation-1st
2015 Swap Meet: Cheese Hat
2016 States: Green Gen-1st, Exp Des-5th, Scrambler-6th
2016 Nationals: Green Generation-1st
2014 States: R&M-4th, Sounds of Music-5th
2015 States: Crime Busters-2nd, Green Gen-2nd
2015 Nationals: Green Generation-1st
2015 Swap Meet: Cheese Hat
2016 States: Green Gen-1st, Exp Des-5th, Scrambler-6th
2016 Nationals: Green Generation-1st
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Re: Crime Busters B
Hello all,
One more question about Crime Busters B. I was wondering - does anyone know what the pH of Sodium Acetate Anhydrous is? It seems as though it's 9, but as a buffer solution when mixed with acetic acid, it is between 3.6 and 5.6. It also doesn't react with HCl, but if it's a base or basic salt, it should. Please help.
Thanks.
One more question about Crime Busters B. I was wondering - does anyone know what the pH of Sodium Acetate Anhydrous is? It seems as though it's 9, but as a buffer solution when mixed with acetic acid, it is between 3.6 and 5.6. It also doesn't react with HCl, but if it's a base or basic salt, it should. Please help.
Thanks.
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