Discuss the application of any three of the following analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment. Neutron Activation Analysis (NAA) ICP-MS (Inductively Couple Plasma -Mass Spectrometry ES) i. i. ii. ICP-ES (Inductively Couple Plasma Emission Spectrometry iv. Electron microprobe analysis V. The lon microprobe vi. Fire assay vii. XRF (X-Ray Fluorescence) viii. AAS (Atomic Absorption Spectrophotometry)

Discuss the application of any three of the following analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment. Neutron Activation Analysis (NAA) ICP-MS (Inductively Couple Plasma -Mass Spectrometry ES) i. i. ii. ICP-ES (Inductively Couple Plasma Emission Spectrometry iv. Electron microprobe analysis V. The lon microprobe vi. Fire assay vii. XRF (X-Ray Fluorescence) viii. AAS (Atomic Absorption Spectrophotometry)

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.5QAP

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Discuss the application of any three of the following analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment. Neutron Activation Analysis (NAA) ICP-MS (Inductively Couple Plasma -Mass Spectrometry ES) ICP-ES (Inductively Couple Plasma Emission Spectrometry Electron microprobe analysis The Ion microprobe Fire assay XRF (X-Ray Fluorescence) AAS (Atomic Absorption Spectrophotometry)
Fluoride determination can be performed photometrically with alizarin red and Zirconium acid solution, obtaining the following data in the calibration: (View Table) 100.0 mL of well water are measured and concentrated to 50 ml by evaporation, the alizarin and zirconium reagents are added (in quantity proportional to the standards) and after the appropriate time, the reading of the instrument (under the same conditions instrumental) reports an absorbance of 0.182. How much fluoride in mg / L does the well water sample contain?
Mercury intoxication could cause tremendous harmful impacts to human, particularly nervous system and kidney. Ireland food safety authority has set the maximum level of mercury in fishery products at 0.5 ppm. Yvonne conducted elemental analysis on lobster. A 0.5 g piece of lobster meat (dry weight) was acid digested and made up to 10 mL solution. This solution gave an absorbance of 0.51 with the calibration graph as below. Suggest asuitable analytical instrumental technique to detect mercury content. Using the calibration graph below, estimate actual concentration of mercury and comment whether this lobster is safe for human consumption.
A 0.0200 gram blood sample was decomposed by a microwave digestion technique followed by dilution to 100.0 mL in a volumetric flask. Aliquots of the sample solution were treated with a lead complexing reagent and water as follows: Solution 1: 10.0 ml blood sample + 20.0 mL complexing agent + 30.0 mL H20. Solution 2: 10.0 ml blood sample + 20.0 mL complexing agent + 26.0 mL H20 + 4.00 mL of 78 ppb Pb2+ standard. The resulting solutions were analyzed by UV/Vis at 375 nm. Absorbance for solution 1 = 0.155 and for solution 2 = 0.216. Calculate the concentration of lead (ppb) in the original sample.
FT-IR technique can be utilized for the analysis of unknown analytes by matching it with__________. Both choices are correct Commercial library/database Reference standard
A chemist received a radioactive sample that is suspected to contain U, 23U and other elements. The authority wants to know the distribution, qualitative and quantitative composition of the sample. Propose with justifications, ONE Surface analysis technique that can be performed on this sample.
Calculate the [FeSCN2+] using volumes of stock solutions. Presume that all the SCN– ions react. STANDARD SAMPLE Volume of Fe(NO3)3 (mL) Volume of SCN- (mL) Volume of H2O (mL) [FeSCN2+] Absorbance 1 2.5 2.0 20.5 0.1918 2 2.5 1.5 21.0 0.3239 3 2.5 1.0 21.5 0.4965 4 2.5 0.5 22.0 0.6209 Stock [Fe(NO3)3] = 0.200 M, Stock [SCN-] = 0.0020 M Any help would be greatly appreciated Please and thanks :)
List three typical examples applications of SFC analysis.
You are developing a procedure for determining traces of copper in biological materials using a wet digestion followed by measurements by atomic absorption spectrophotometry. In order to test the validity of the method, you obtain a NIST orchard leaves standard reference material and analyze this material with your procedure five times and obtain a mean of 12.27 ppm with a standard deviation of 0.097 ppm. The NIST sample is listed as 11.7 ppm. Does your method give a statistically valid value at the 95% confidence level?
Lead in dry river sediment was extracted with 25 wt% HNO3 at incubation temperatures for 1 hr. Then 1 mL of filtered extract was combined with other reagents to a total of 4.60 mL. Pb+2 was measured by an electrochemical method by spiking with 2.50 ppm Pb2+. added vol. of 2.50ppm Pb2 signal 0 mL 1.10 0.025 mL 1.66 .050 mL 2.20 .075 mL 2.81 what is Sx based on Sy
Many rivers in Ghana are affected by illegal small-scale mining. Studies have revealed extremely high deposits of heavy metals and participate matter in rivers, making them unwholesome for drinking. With your knowledge on analytical separation and analysis, outline a suitable analytical separation protocol that can be employed to recover polluted river bodies and make them wholesome for drinking.
As part of an analytical chemistry laboratory course, a student measured the Ca2+ content in two water samples, city-supplied drinking water and well-supplied drinking water, using two different analytical methods, flame atomic absorption spectrometry (FAAS) and EDTA complexometric titration. The results of this experiment are given in the table as the mean Ca2+concentration (?¯) and standard deviation (?) in parts per million (ppm). Each sample was measured five times (n=5) by each method. Method City-Supplied Drinking Water (?¯±?x¯±s) Well-Supplied Drinking Water (?¯±?x¯±s) FAAS 57.57±0.68 ppm 64.77±0.70 ppm EDTA titration 58.32±0.96 ppm 65.62±0.97 ppm Method Comparison: For each drinking water sample (city and well), compare the Ca2+ content measured by FAAS and EDTA titration. Calculate the ? value for each sample. Do the methods produce statistically different results at the 95% confidence level when measuring the Ca2+content of the city-supplied drinking water? Do the…