Without checking the accuracy of a given Pipetman, would you pre- dict that it is better to use a P-200 or P-1000 to pipet 100 µL? Why?
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- Why is control of column and detector temperature more important for non- suppressed IC (Ion Chromatography) than it is for suppressed IC?The following image is a scheme for serial dilutions prepared for spectrophotometric analysis. If the stock solution concentration is 0.05 % (v/v) can you calculate the other tube’s concentrations in % v/v? I've used this with direct dilutions, how would I use this on serial dilutions?What volume of a 40% v/v solution must be used to produce 500mL of 5% v/v solution?
- In UV/Visible spectrophotometer analysis for a multicomponent system, there are only two dyes used in the mixture, the two proportions should be totalled to 1.0. but on finding You got 0.6 in total. Explain the reasons for the difference.A chromatographic separation of four compounds gave the following results. The dead time (tm) is 16.7 sec. (a) What is the capacity factor for analyte 4? (b) What is the resolution factor for analytes 3 and 4?Release of drug from a 20mm gel cube (B) was tested by placing it in a large dissolution apparatus containing a buffered solution into which the drug (A) was extracted. 4 of the sides are sealed, while 2 opposite sides are not. If Xp = 0.4, and DAB = 1.8 x 10-6 cm2/s, what ist (hr)?
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