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Analytical Chemistry
Explore questions in the Analytical Chemistry category that you can ask Spark.E!
- volume initial solution (calcul used to calculate mpure)
- true or false A change of 1 on the pH scale is equal to a change of 10x molar concentration
- How would you change the mobile phase so compound C would elute sooner, without changing the relative positions of compounds A and B
- Why is it common to use absorbance values rather than transmittance values when doing quantitative UV-Vis spectroscopy
- Why must sugars and fatty acids be derivatized before GC analysis, while pesticides and aroma compounds need not be derivatized
- Does anion-exchange stationary phase have a + or - charge?
- A particular food coloring has a molar absorptivity of 3.8 × 103 cm−1 M−1 at 510 nm. What will be the absorbance of a 2 × 10−4 M solution in a 1-cm cuvette at 510 nm?
- What factors should be considered in selecting a specific method for mineral analysis for a food product
- In fluroescence spectroscopy, why is the wavelength of the emitted radiation longer than the wavelength of the radiation used for the excitation of the analyte
- You are performing liquid chromatography using a stationary phase that contains a polar nonionic functional group. What type of chromatography is this, and what could you do to increase the retention time of an analyte?
- What is the overall charge of the protein of interest that adsorbed to the stationary phase
- What factors can contribute to the attenuation of a beam of radiation as it passed through cuvette containing an absorbing solution
- is the isoelectric point of the protein of interest higher or lower than pH 8.0
- What is the physical variable measured in mass spectrometry?
- Relationship between frequency and wavelength
- What units of mass do we use most in biotech?
- What units of volume do we use the most in biotech?
- Describe different types of stationary phases used in chromatography.
- What are some characteristics of a mobile phase?
- Acceleration of ions depends on _____ ?