summitmage2

As I understand it, the components of a substance are separated in an HPLC column through absorption and desorption. The eluent is then passed through a flame ionsation detector. This detector works by providing the atoms/molecules with sufficient energy that they become ions. These ions then cause a current to flow between two ends of a circuit, which is then registered on a graph.

So shouldn't FIDs detect molarity rather than mass/volume concentration?

So if I had an substance with a high molar concentration of substance A and a low molar concentration of substance B, but substance B had a much higher molecular mass than substance A, which would produce the greater peak area on the chromatograph?

hey, was wondering if anyone could either give me a list of commonly used polymer modifiers (e.g. dyes, UV stabilisers, flame retardents, etc.) and how they work or recommend a good reliable website with that kind of information. thanks in advance

The average value of the function y = sin(x) over the interval [0,pi] is:

A) pi/2

B) pi/4

C) 2/pi

D) 2

E) 1/pi

if you could also explain the reasoning, thatd be great. thanks in advance

3. Which of the following is not an even function?

A) f(x) = |5x|

B) f(x) = cos^2 (x)

C) f(x) = sin(x)

D) f(x) = x^2

E) f(x) = (2x)^2

could someone please tell me the answer and the reason why? thanks in advance

i know that strontium in general is highly reactive and so is usually stored under kerosene, but given that strontium 90 is a radioactive isotope, are there any other special features of its method of storage?