Question 7procedure for using a reference blank before taking sample measurements with the spectrometer. Explainwhy it is necessary for you to use a reference in today's experiment.The figure below is taken from the introduction to this lab experiment. It shows thesamplesamplewith backgroundbackground (everythingexcept the sample)1001100100%T%T%TWavelengthWavelengthWavelength||

The spectrophotometry is a technique which is used for the determination of the constituents present…

Question 7 The figure below is taken from the introduction to this lab experiment. It shows the procedure for using a reference blank before taking sample measurements with the spectrometer. Explain why it is necessary for you to use a reference in today's experiment. background (everything except the sample) sample sample with background 1001 100 100 %T %T %T Wavelength Wavelength Wavelength

Question 7 The figure below is taken from the introduction to this lab experiment. It shows the procedure for using a reference blank before taking sample measurements with the spectrometer. Explain why it is necessary for you to use a reference in today's experiment. background (everything except the sample) sample sample with background 1001 100 100 %T %T %T Wavelength Wavelength Wavelength

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

Chapter4: Digital Electronics And Computers

Section: Chapter Questions

Problem 4.11QAP

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6 PLEASE PROVIDE THE INTERPRETATION OF ALL SAMPLES FOR HELPFUL RATINGS. THANK YOU. *INCLUDE ALL YOUR REFERENCES
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How is light and energy used in gas chromatography- mass spectrometry (GC-MS)?
A researcher was attempting to quantify the amount of dichlorodiphenyltrichloroethane (DDT) in spinach using gas chromatography mass spectrometry (GCMS). First attempts using external calibration proved difficult, as reproducibility and external standard agreement were poor. To overcome these problems, the researcher used the internal standard calibration method with chloroform as the internal standard. To begin, the researcher analyzed a sample containing 5.67 mg/L DDT standard and 1.84 mg/L chloroform as the internal standard, which produced peak areas of 4035 and 10177 for the DDT and chloroform, respectively. After establishing the response factor of the instrument, the researcher collected 11.53 g of spinach, homogenized the sample, and extracted the DDT using an established method, producing a 3.70 mL solution containing an unknown amount of extracted DDT. The researcher then prepared a sample for analysis that contained 1.00 mL of the unknown DDT solution and 2.00 mL of 10.25…