Answered: how would you sample, preserve and…

Science

Chemistry

how would you sample, preserve and prepare these samples for GC analysis and why GC is the best detection technique?

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter2: Resolution Of Matter Into Pure Substances, I.paper Chromatography

Section: Chapter Questions

Problem 2ASA

See similar textbooks

Related questions

Q: Calculate the pH of the cathode compartment for the following reaction given cell = 3.01 V when…

A: Here we have to determine the H1+ concentration of the given Galvanic cell . The given problem can…

Q: 1. Galium (Ga) is an element in group III with atomic number 31. By referring to the Periodic Table,…

A: #1: Gallium(Ga) is a group-III element with atomic number31. Hence it has 3 valence electrons.

Q: What is the concentration of Ag(NH₂)* in solution?

Q: [References] What is the molar hydronium ion concentration in solutions with each of the following…

Q: What is the major neutral organic product for the following transformation? ов 1. LDA 2. зе за н ОН…

A: In this question we have to tell the major neutral organic product of the reaction.

Q: 15) The positively polarized carbon atom of a carbonyl group acts as: A) an electrophile and a Lewis…

A: we have to identify the correct statement for the carbon atom of carbonyl group

Q: The following is classified as: H₂C CH₂ 1. NaCN 2. H₂O H₂C OH CN CH3

Q: At 25 °C, a solution has a hydronium ion concentration of 8.50x10-9 M What is the pH, pOH, and [OH*]…

Q: 1. Identify the following as either an acid or a base (a) HNO3 (h) CH,NH, (c) CH3COOH (d) HCIO₂ (e)…

A: It is asked to distinguish between acid and bases in question no 1and to find stong acid,weak…

Q: Natural gas does not usually contain one of the following gases

A: 1. Cyanuric acid is formed by drawing a water molecule from triiot It is false. So, the correct…

Q: Which of the following compounds cannot be used, even theoretically, in the :preparation of…

Q: Consider the following system at equilibrium where AH = -108 kJ and Kc = 77.5, at 600. K. CO(g) +…

A: As per Le Chatelier's principle, any change during a chemical reaction causes the reaction to flow…

Q: - Prepared each of the following polymers as copolymers:- 1- Poly (phosphazene-Siloxane) 3- Poly…

A: When different mononers polymerize then they give co polymers.We have to prepare the Co-Polymers of…

Q: Consider the titration of 25.0 mL of 0.124 M acetic acid (CH₂COOH, pK, = 4.75) with 0.125 M NaOH.…

A: #1. Calculation for initial pH: Initial [CH3COOH] = 0.124 M pKa = 4.75

Q: An organic acid has pka = 2.87. What is its Ką value?

Q: Provide or make a schematic diagram showing the EXTRACTION PROCESSES OF CAFFEINE. please follow…

A: Caffeine is an alkaloid which occurs in more than 60 plant species. It belongs to a class of…

Q: None of these structures Any of these structures Y H₂, Pd/C

A: Organic reactions are those in which organic reactant react to form organic products.

Q: Platinum is a precious metal that is used as a catalyst for many important industrial reactions.…

Q: At 20 °C a saturated solution of silver acetate, AgCH, CO2, contains 1.0 g of the silver compound…

Q: An alloy is 12.8% copper by mass in tin. Copper makes up what percentage of the atoms in this sample

Q: A. is-1,2-difluoroethene trans-1,2-difluoroethene m lv. [PdCl.j³

A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…

Q: Select an appropriate synthetic route to prepare 3-bromo-1-propanol from propene. 1. BH3-THF; 2.…

Q: 20. What is the product obtained from the following reaction? Circle one answer. OH 4 heat 3 OH 2 OH

Q: pH Titration Curve for titrating 24.1 mL of Aqueous Lithium hydroxide with 0.745 mol/L Hydrobromic…

A: In the given question we have to identify the equivalence point , pH and indicator used in the given…

Q: What is the major product of this reaction? HO D C A H B (A) None of these OCH3 OCH 3 H NaBH4 MeOH…

Q: 1. Write a dissociation equation for any acid/base reactions observed in (1). If no reaction was…

A: When we dissolve a compound into water then it dissociates into ions.

Q: you are given 4 solutions: A. 15g of glucose in 500mL of water B. 600mL of 4% fructose C. 0.9L…

A: As per the rules, only the first three sub-parts can be answered

Q: The strongest interparticle attractions exist between particles of a between particles of a O solid,…

Q: .) Hydrogen iodide is synthesized from the elements in a gas-phase reaction. One of ine proposed…

Q: Propose a synthesis of E from F and any other reagents of your choice. Show reaction mechanisms and…

Q: 4- A compound with the general formula C4H6 and having two types of signals in the HNMR spectrum is…

Q: HCN is a monoprotic weak acid with a K, value of 4.90 x 10-10 Calculate the pH of a 6.00 x 10-6 M…

Q: Consider the following galvanic cell at 25°C. Pt | Cr2+ (0.30 M), Cr3+ (2.0 M) || Co2+ (0.20 M) | Co…

Q: A reaction has an activation energy of 225,0 kJ/mol. By what factor will the rate constant, k,…

A: Arrhenius equation: Arrhenius equation give the relationship between the activation energy and the…

Q: Determine if chiral or achiral. State if meso applies

A: Chiral carbon: The sp3 hybridized carbon atom that is attached to the four different types of atoms…

Q: A flask has a total pressure of 6.8 atm. The partial pressure of Ne is 450 torr, the partial…

Q: At what temperature is a reaction spontaneous if it has; ΔH = +71 kJ/mol and ΔS = +167.2 J/Kmol.…

A: We have to calculate the temperature for which the reaction will be spontaneous

Q: Complete and balance the following half-reaction in acidic solution. Be sure to include the proper…

Q: approaches infinity in the virial equation of state, a real As the gas will start to behave as an…

A: Please find your solution below : Virial equation of state is an equation that describes the…

Q: Examples of strong bases and their ionization reactions are included in Table 15.3. Both KOH and…

A: Based on the ionization reaction we can explain the ability to accept hydrogen ions.

Q: Indicate the polarization (with a 8 and 8) of the highlighted bond in the following compounds: CI Li…

A: Polarization means there is separation of charge between two atoms due to difference in…

Q: 1.How many moles of butane (C4H10(g)) were combusted in the presence of excess oxygen gas if 55.8 L…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The property that describes a fluids resistance to flow is adhesion diffusion surface tension…

A: To solve this problem we have to know about the given terms .

Q: During a phase transition (such as freezing) there is a change in temperature. O True False

Q: 7) Oxidation of a 1° alcohol with chromic acid results in the production of A) an ester D) an acid…

A: we have to select the product of oxidation of primary alcohol with chromic acid

Q: An 80:20 mixture by mass of N, and O, is placed in a 5.00 L cylinder at a total pressure of 30.0 kPa…

Q: Which of the following describe the major product(s) of this reduction reaction (you may assume…

A: A reduction reaction is given.LiAlH4 is a strong reducing agent .It is not a selective reducing…

Q: Question: 1. A solution contains 20.0 g (NH4)2SO4 in 250 mL water. Answer the following: 8.a.…

Q: 6) Which of the following undergoes SN2 reaction with sodium methoxide most rapidly? A) PhCH₂Br B)…

A: In SN2 reaction, there's no possibility of formation of carbocation. so the stability order is…

Q: use the tabulated half-cell potentials to calculate G for the following balanced redox reaction 3…

A: Recall the given redox reaction, 3 I2 s + 2 Fe s → 2 Fe3+ aq + 6 I-…

Concept explainers

Applications of Molecular Spectroscopy

When light sources pass through the diffraction grating then light splits into different wavelengths. The light source produces two types of patterns that are shown as destructive and non-destructive. The light source is in the form of quanta that is quantitation.

Question

You are an aquatic scientist and tasked to sample water that contains chlorophenols for gas chromatographic analysis from your local waste water treatment plant (WWTP). Using knowledge of sample preparation and chromatograph, how would you sample, preserve and prepare these samples for GC analysis and why GC is the best detection technique?

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Gas Chromatography (GC) is one of the useful techniques in analytical chemistry. Give two important components in GC.
Can paper chromatography be used to separate and identify very volatile substances? Why? Please explain comprehensively.
Why is strict implementation of LQMS (Laboratory Quality Management System) or GLP is necessary ? What are the elements ?
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.
Why chromatography is an important tool for analysis of organic compounds?
What are the differences between systematic and random errors and how do they effect accuracy and precision? In what circumstances would you use standard addition (versus a normal calibration curve) to determine the amount of an analyte in a sample? A urine sample, containing analyte Z is analysed by the standard addition method where 5 mL of the original sample was mixed with increasing amounts of a Z standard and each solution diluted to a volume of 50 mL prior to analysis. A plot of the final concentration of the standard in each of the 50 mL samples (x axis) versus The measured signal from the analysis of each 50 mL sample (on y axis) produced a straight line with the general equation: y = 44.72x + 4.06 what was the final concentration of Z in the 50 mL standard addition sample? what was the initial concentration of Z in the original urine sample?
Which one is the most common method used for the purification of liquid mixtures? Filtration Chromatography Evaporation Distillation
what is chromatography? Explain different types of chromatography and explain how to seperate compounds. indicate stationary phase mobile phase.
To quantify the amount of ethanol in a beverage, a technician prepared the first solution which contained 4.90 grams unknown, 1.00 grams acetonitrile, and 4.10 grams water. After the GC analysis which reported the peak areas of 5,742 for ethanol and 3,829 for acetonitrile, the technician added 0.20 grams ethanol to the first solution and ran the GC analysis again. This time, the peak areas of 6,382 for ethanol and 3,709 for acetonitrile for solution 2 were obtained. What was the percent by mass ethanol in the original beverage?
Pesticide residues were found in a lot of oranges; the compound identified was the epoxide of heptachlor (EH). To quantify the amount of this pesticide in oranges, 20 grams were taken from fruit peels and mixed with methylene chloride to extract it. The concentration of heptachlor epoxide in the sample was determined by gas chromatography coupled to a detector mass (GC-MS); and calibration was performed using anthracene (A) as internal standard. For In this analysis, the anthracene had a concentration of 350 ppm and the same volume was added to each standard. The table below shows the concentrations of the standard and the ratio of the areas.and the sample is: 0.1080.Determine the concentration of heptachlor epoxide in the sample.
One method for quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is the area normalization method. In this method, complete elution of all of the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction is accomplished by dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. For a chromatogram containing three peaks, the relative areas were found to be 16.4, 45.2, and 30.2 in the order of increasing retention time. Calculate the percentage of each compound if the relative detector responses were 0.60, 0.78, and 0.88, respectively
19. What is thin layer chromatography (TLC) LEAST useful for from the list below? A) To determine if crystallization or distillation may be more effective for a separation B) To determine the number of components in a mixture C) To determine the appropriate solvent for column- chromatographic separation D) To monitor the progress of an organic synthesis reaction 14. The solubility of salicylic acid in water is 7.8g/100ml at 100°C and 0.25g/100ml at 25°. Estimate how much water is needed to recrystallize a 19g sample of salicylic acid? A) 150ml B) 250ml C) 300ml D) 400ml