Dextro and Bees: I realize this deals more with nonmenclature than the topic at hand.
So please forgive the intrusion and hijacking of this thread.
WizardX:
Cool deal WizardX!
Thank you for the clarification.
I also noticed that my pipettes dropped more liquid per drop than an ordinary household eyedropper.
I guess these type discrepencies lend themselves to inconsistancy between clandestine kitchen/household chemistry and real life lab professional chemistry.
Believe it or not...depending on the procedure, this can spell the difference between success and failure where accuracy is a must.
As much I felt I was being too anal and/or picky in the above post.
(in other words "I wasn't trying to get the DROP on Ya"
)
I also knew that your expertise in labwork would help us all arrive at an understanding to diminish the margin to err in all areas...not just this one.
Thank You! And thank you as well for describing what may be encountered in more/less concentrate marquis solution.
For reagants used as organic indicators, the importance is that the color shows.
Unless in extreme "weaker/stronger" marquis solution,
"weaker/stronger"=time for color to appear
=hue/tint of color indication
Now Ibee is more inclined to make a note of the "drop" source whenever he uses drops in write-ups from now on.
ie...eyedropper, pipette, blood...sweat...tears...Mr.Johnso......errr uhhh Nevermind[YIKES!]
Thanx again!
http://www.peteducation.com/category_summary.cfm?cls=0&Cat=1305
Also...see
http://www.newton.dep.anl.gov/askasci/chem00/chem00578.htm
Looky what I found!(*see pipetters below*)
•adjustable 20-200 or 10-100µl eppendorf pipette with yellow tips
Now as with anything chemistry related I didn't expect to find anything but an accurate definition surrounding Pipettes and PIE-Petters !
So here ya have it.
PIPETTES AND PIPETTERS
PIPETTES: There are three kinds of pipettes:
1. TD (to deliver) pipettes which deliver the final volume someplace before the tip (no rings marked on the top of the pipette;
2. TD pipettes which deliver the final volume to the tip and are designed to be blown out (marked with two double rings at the top of the pipette;
3. TC (to contain) pipettes which deliver the final volume by touching the tip of the pipette to the side of the beaker or flask which will leave a drop of solution in the pipette.
TC pipettes are rare. Volume is measured at the bottom of the meniscus.
PIPETTERS: Rainin Pipetman Pipetters are available in four sizes;
P10 (measures 1-10 ul),
P20 (measures 1-20 ul),
P100 (measures 10-100 ul)
and P1000 (measures 100-1000 ul).
P10, P20 and P200 require a small (usually yellow or white) pipette tip.
P1000 requires a larger blue tip.
NEVER pipette without a tip.
To get the required volume, set the pipette by using the threaded wheels at the top of the pipette and reading the amount in the window, depress the plunger to the first stop, insert the tip in the solution, slowly release the plunger. To transfer the liquid, press the plunger to the first stop, wait 1 sec., depress the plunger to the second stop to expel the last drop. NEVER tilt the pipetter upside down when there is fluid in the tip.
For P10, P20 and P200 pipetters, the red digits on the dial indicate tenths and hundredths of microliters.
For P1000 pipetters, the red digits on top indicate milliliters. In all cases, the black digits are m l (microliters).
Tips for accurate pipetting:
It's not necessary to put any pressure on the first stop. If you do, you will actually pipette a few extra m l of fluid.
http://fp.bio.utk.edu/mycology/Techniques/mt-calculations.htm
Ya gotta love this MindExpanding place!