Types of stationary phases used for chiral separations in HPLC
Describe the types of stationary phases used for chiral separations in HPLC including structural requirements.
Write an account on what you consider to be the most significant advances made in the field of modern analytical techniques during the last five years. Include specific examples in your answer.
Write a brief account on the use of ICP-MS. Describe the Factors influencing the sensitivity of the elements being measured and potential use of ICP-MS besides total elemental analysis.
Application of Forensic Chemistry
I found a a paper entitled "The forensic analysis of soils and sediment taken from the cast of a footprint", this paper explains how crime investigators could use the forensic chemistry method (EDTA) to determine whether the limestime took from a criminal shoes came from the crime scene. However, it does not explain the limitati ...continues
Fraction of Element in a Sample
1. A 10.231 g sample of window cleaner containing ammonia was diluted with 39.466 g of water. 4.373 g of this solution was found to require 14.22 mL of 0.1063 M HCl to reach the bromocresol green end-point. (a) What fraction of the 10.231 g sample of window cleaner was contained in the 4.373 g sample? (b) How many grams ...continues
Statistical Method (Concentration and Absorbance)
1. A gun shot residue containing barium and lead is analysed using atomic absorption. Residue from sample collected in Glasgow and Inverurie are also available Glasgow gun shot residue (n-20) Ba (o.12+/-0,005%), Pb (5.2+/-2.0%) Inverurir (n=5) Ba (0.22+/-0,001%), Pb (7.2+/- 1.0%) (a) Describe the necessary parts of an ...continues
Measuring concentration of acetic acid and other organic acids in an aqueous solution
If I have an unknown aqueous solution that exhibits a pH of approximately 4.0 but is known to consist of predominantly organic acids such as acetic acid, formic acid, benzoic acid, pyruvic acid, phenolic acid etc. etc. What analytical method would be employed to measure and determine the concentration of each acid in solution ...continues
Show that the maximum buffer capacity occur at pH=pKa
The question is attached.
Explain x-ray fluoresence vs. mass spectroscopy for analysis of boron
First, is it correct to say that XRF measurement applies only to metals and transitional metals in the periodic chart? In otherwords, XRF can only be used to measure ppm levels of metals in solution etc. etc. For instance, zinc and aluminum could be measured with XRF. What about a non-metal like boron ---- why can't XRF truly ...continues
Analytical Chemistry: Making a Stock Solution.
A chemistry student is about to make a stock solution of 0.1 molar HCl. He proceeds by adding two 10mL additions of 10M HCL to a 500mL beaker and fill it with water from the sink. Other than not using di-ionized water, what are all other problems associated with this procedure. **No other information given**
