The following data was obtained for an experiment on the gas chromatographic determination of toluene in an unknown sample using the internal standard method. Concentration (mass %) Toluene Peak Area Ethylbenzene Peak Area 0.50 0.539 1.970 1.00 1.150 2.051 2.00 2.174 2.018 3.00 3.308 2.009 unknown 1.382 2.015 a) Plot the calibration curve for this analysis and calculate the slope, y-intercept, and Pearson correlation coefficient. b) Find the % of toluene in the unknown.

The following data was obtained for an experiment on the gas chromatographic determination of toluene in an unknown sample using the internal standard method. Concentration (mass %) Toluene Peak Area Ethylbenzene Peak Area 0.50 0.539 1.970 1.00 1.150 2.051 2.00 2.174 2.018 3.00 3.308 2.009 unknown 1.382 2.015 a) Plot the calibration curve for this analysis and calculate the slope, y-intercept, and Pearson correlation coefficient. b) Find the % of toluene in the unknown.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: In molecular exclusion (size exclusion) chromatography, molecules have the the longest retention…

A: Molecular exclusion chromatography is base on size of molecules. It is a separation technique that…

Q: A chromatographic analysis is performed with a sample containing toluene and benzene. The column…

Q: explain what a response ratio is in Gas Chromatography and why it might be needed to quantify…

A: Gas chromatography (GC) is an analytical technique used to separate the chemical components of a…

Q: Retention Time Area of Peak % of Total Identity Component 1 Component 2 Component 3

A: Given data:

Q: How does it affect the peak produced in gas chromatography when: – Inserting samples is too slow –…

A: ✓Chromatography is a technique that separates components in a mixture by the difference in…

Q: The height of three peaks; A, B, and C obtained in a gas chromatogram are 20.6 mm, 17.5 mm and 40.6…

A: A numerical problem based on gas chromatography, which is to be accomplished.

Q: A student analyzes sample 1, and sample 2 chromatograms of a mixture containing two compounds (A +…

A: The two samples( Compound A+Compound B ) are undergone chromatography : Compound A and Compound B

Q: How to interept this data to match the structure? It gives the peak/PPM and having trouble matching…

A: The given NMR data is needed to be interpreted and the each signal obtained is needed to be assigned…

Q: 4. The chromatogram below shows the separation of a mixture obtained by gas chromatography (GC)…

A: The principle of separation in gas chromatography (GC) is based on the partitioning of the sample…

Q: Which of the following are characteristics of normal-phase chromatography? I - The stationary phase…

A: The correct answer is:I and III Detailed Explanation: To understand why this is the correct answer,…

Q: The method of internal standard was used to analyze and measure the concentration of chemical X by…

A: Volume of unknown X =3.0 mL Concentration of Y in the mixture = 1.6 x 10-5 M Volume of Y in the…

Q: You are analyzing a forensic sample for the presence of controlled substances using HPLC. Which of…

A: Detector is given.

Q: 1) Formula: C4H10O2 PPM Broad singlet (2H) Multiplet (2H) Integration 1.114 6H 3.764 2H 3.998 2H ma…

A: I'll guide you through solving this NMR spectroscopy problem step by step. Step 1: Analyze the given…

Q: A certain mixture contains the following compounds: propionic acid, 2-hexanol, isoamyl acetate, and…

Q: A solution with 0.083 7 M X and 0.050 0 M S9 gave areas AX = 423 and AS9 = 372. Then 10.0 mL of 0.05…

A: Given: A solution having 0.0837 M X and 0.0500 M S’ showed peak areas AX = 423 and AS’ = 372,…

Q: Calculate the average and standard deviations for each solution (and solvent).

Q: In another chromatography experiment, pure chemical “A” leaves a yellow spot with an Rf = 0.49 and…

Q: Maximum Advance of Mobile Phase Starting Line A) Sample 1 appears to be a homogeneous sample…

A: Thin layer chromatography (TLC) is a method of separating components of the mixture. It is based on…

Q: True or False: Liquid-solid phase column chromatography is used to separate large up to multigram…

A: The above statement is true.

Q: A mixture of four components (W-Z) was chromatographed on a silica gel column; 11 fractions were…

A: Here TlC plates is given and we have to find out with fraction should combined to get pure sample of…

Q: Chromatography involves the separation of two or more compounds/ions caused by their molecular…

A: Chromatography involves the separation of two or more compounds/ions caused by their molecular…

Q: For a concentration technique, Stotal is given as 19.31 ± 0.035, Smb is 0.22 ± 0.008, and kA is…

A: We will choose the false statement answer for the above question.

Question

The following data was obtained for an experiment on the gas chromatographic determination of toluene
in an unknown sample using the internal standard method.
Concentration (mass %)
Toluene Peak Area
Ethylbenzene Peak Area
0.50
0.539
1.970
1.00
1.150
2.051
2.00
2.174
2.018
3.00
3.308
2.009
unknown
1.382
2.015
a) Plot the calibration curve for this analysis and calculate the slope, y-intercept, and Pearson
correlation coefficient.
b) Find the % of toluene in the unknown.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Calibration curve

VIEW

Slope and intercept

VIEW

Pearson correlation coefficient

VIEW

Part (b)

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

The identity of a volatile petroleum residue is determined by the (size, pattern) of its gas chromatogram
Thin Layer Chromatography. All types of chromatography have mobile phaseand stationary phase. What is a stationary phase and a mobile phase? Elaborate your answer.
What is the relative average deviation in the following percent KHP values in ppt? (Enter your answer as a number without units.) 46.89 % 47.51 % 47.92 %
The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds labeled A and B. The separation employed a 2.50 meter packed column under isothermal conditions (90 °C) and a flow rate of 10 mL/min. Detector Signal 300.0 250.0 200.0 150.0 100.0 50.0 0.0 1.0 1.1 Unretained 1.5 time (min) Find the times that components A and B spend in the stationary phase. 2.0
would column chromatography separate ketone and alcohol
A3
5
1. From spinach, the chromatographic analysis will yield two major substances: (a) B-carotene (C40H56), which will separate from the spinach mixture to form a yellow band, and (b) chlorophyll A (CSSH72MGN4OS), which will separate from the mixture to form a green band. i. Describe the characteristics and draw structures of these molecules. ii. From the spectrophotometric analysis, what wavelength (Amax) would you expect ß-carotene (C40H56) to absorb? What wavelength would chlorophyll A (CssH72MgN4O5) absorb?
the linear trendline equation y= 4.7033x + 0.0045
The following data give the recovery of bromide from spiked samples of vegetable matter, measuredusing a gas–liquid chromatographic method. The same amount of bromide was added to each specimen(Roughan, J.A., Roughan, P.A. and Wilkins, J.P.G., 1983, Analyst, 108: 742).Tomato: 777 790 759 790 770 758 764 ug/gCucumber: 782 773 778 765 789 797 782 ug/g(a) Test whether the recoveries from the two vegetables have variances which differ significantly.(b) Test whether the mean recovery rates differ significantly.
With the following information for a GC analysis using an internal standard, calculate the percentage of alcohol in the sample. The 1% ethanol standard sample has an ethanol peak area of 711 and a 1-propanol peak area of 9253; 3% is 3536 and 14432 for ethanol and 1-propanol respectively; 5% is 3506 and 10693; 7% is 5874 and 10847 and 9% is 5203 and 7522. The beer sample has an ethanol peak area of 5471 and 1-propanol of 14384. 4.95% 5.15% 5.05% 5.25%
A gas chromatogram of a mixture of toluene and ethyl (a) Measure w1/2 for each peak to the nearest 0.1 mm. When the thickness of the pen trace is significant relative to the length being measured, it is important to take the pen width into account. It is best to measure from the edge of one trace to the corresponding edge of the other trace, as shown at the bottom of the left column. (b) Find the number of theoretical plates and the plate height for each peak.