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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.

Panda Weasley wrote:

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.

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.

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?

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?

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?

KS_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.