Describe the problem that can arise when you use an amplifier with a low input impedance. Calculate the output of the following circuit. P -nitrophenol is a priority pollutant that produces adverse health problems at middle to upper part per billion levels in natural waters and wastewaters. Justify your choice of chromatography and detector. You may want to consult a CRC or Merck index.
Voltammetric signals are a combination of faradaic and non-faradaic responses.
The faradaic signal arises from the oxidation or reduction of a chemical species at the electrode surface and in general is the part of the signal we want. When linear sweep voltammetry is run using a Pt electrode, the resulting voltammogram has a peak shape. Draw a schematic diagram of a flame ionization detector and explain how it works. Explain your reasoning. Show your measurements on the figure and your work for the calculation.