An atomic absorption spectroscopy analysis provided the following data for theanalysis of Cu in a river sample:SampleAbsorbanceBlank0.00021.00 mg/L0.14313.00 mg/L0.37825.00 mg/L0.58097.00 mg/L0.7920River water0.65408.5.1 Use a suitable scale and plot a calibration curve to determine theconcentration of Cu (mg/L) in the river sample.(5)

Step 1:Absorbance is the dependent variable; it is placed on y-axis.Concentration is independent…

Answered: An atomic absorption spectroscopy…

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter10: Atomic Emission Spectrometry

Section: Chapter Questions

Problem 10.2QAP

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Explain why an internal standard is required during sample preparation in quantitative analysis when using atomic spectroscopy?
Flame Atomic Absorption Spectroscopy (FAAS) method is selected due to its wide applicability for metal ion analysis in drinking water samples. Provide appropriate discussion to determine the concentration of selected heavy metals (Cu and Cr) in the unknown tap water sample.
i) Find the differences between the AES and XPS in terms of principle and information obtained from the spectra. ii) Why AFM is mostly utilized microscopic method for the determination of the thickness of the film?
What is the chemical shiftSplitting pattern Integration from this HnMR
Discuss and explain the differences that you observe when calibrating with both techniques (AAS and ICP-AES).
Flame Atomic Absorption Spectroscopy (FAAS) method is selected due to its wide applicability for metal ion analysis in drinking water samples. Discuss how can we determine the concentration of selected heavy metals (Cu and Cr) in the unknown tap water sample.
When analyzing a selution component by UV-visible spectrophotometry. we prepare solutions with a range of concentrations by serial dilution. Why do we need to analyze a range of solutions? To allow multiple determinations of absorbance at different wavelengths and different concentrations To provide more than one determination of absorbance for a given concentration To see how absorbance varies with concentration To ensure that the linear relationship between absorbarce and concentrasion is velid for a range of concentrations.
Use the analytical process to gain qualitative and quantitative information of palm oil adultered with any toxic dye using the raman spectroscopy Explained the bases of your analytical protocol
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As a forensic toxicologist, you have been given a task on determining amount of cadmium, mercury, chromium, copper and lead metal contents in medicinal herbs using flame atomic absorption spectroscopy (AAS). Hollow cathode lamp (HCL) was selected as radiation source for this analysis. The highest concentration came from lead element followed by chromium and copper, however cadmium and mercury were not detected in the sample. a) Based on your knowledge, conclude whether the above result is valid or not. b) If you are given an option of electrothermal or flame atomizer for above case study, determine which one is suitable and justify your answer.
Inductively coupled plasma–optical emission spectrometry (ICP-OES) was used for the determination of cadmium using indium as an internal standard. A solution containing 2.15 ppm Cd2+ and 5.76 ppm In3+ gave signals of 19,291 and 37,190 counts for cadmium and indium, respectively. A 0.01652 g sample was dissolved in acid and quantitatively transferred to a 250.0 mL volumetric flask. A 1.00 mL aliquot of 264.5 ppm In3+ was added and the flask was diluted to volume with deionized water. ICP-OES analysis of the sample solution gave signals of 31,109 and 118,941 counts for cadmium and indium, respectively. What was concentration of the Cd2+ in the sample? Give answer all questions with explanation
(a) A sample of body serum is to be analysed for sodium by flame emission spectroscopy. 1.00cm3 aliquot of serum was pipetted into each of two 50.0 cm3 volumetric flasks. The firstflask was diluted to volume with deionised water. The absorbance of this first solution was0.350. To the second flask 10.0 cm3 of a 25.0 ppm sodium standard was added and theflask made up to volume with deionised water. The absorbance of this second solution was0.720.(i) Calculate the concentration of the sodium in the body serum in mg dm–3

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