8. A solution was prepared by mixing 50 μL of 8 mg/mL octadecane internal standard with...
8. A solution was prepared by mixing 50 μL of 8 mg/mL octadecane internal standard with 100 μL of 12 mg/mL of a dodecane standard with 350 μLhexane. The octadecane peak area was 357 while the dodecane area was 516. Calculate the Response Factor.
9. The same internal standard was used to prepare an unknown sample of dodecane. The sample
was prepared by mixing 50 μL of 8 mg/mL octadecane and 100 μL dodecaneof unknown
concentration. The areas were 382 for octadecane and 463 for
dodecane. Calculate the unknownconcentration. Remember to use
significant figures.
Please solve question 9.
Homework Answers
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8. A solution was prepared by mixing 50 μL of 8 mg/mL octadecane
internal standard with...
This calculation has a number of steps. Only the final value is input for assessment. For GC analysis, your sample solution is madeup by mixing 2.00 mL of water with 50.0 µL of your unknown and 3...
This calculation has a number of steps. Only the final value is input for assessment. For GC analysis, your sample solution is madeup by mixing 2.00 mL of water with 50.0 µL of your unknown and 30.0 µL of a 10.0 ppm internal standard. The response factor (F) has previously been determined to be 2.2. The GC analysis yields peak areas of 1675 for the unknown and 1685 for the internal standard. Calculate the concentration of the internal standard in...
BSA Standard (mg/mL) BSA Working Solution (0.5 mg/mL) ddH2O (µL) BSA Standard (µL) 1 x Bradford...
BSA Standard (mg/mL) BSA Working Solution (0.5 mg/mL) ddH2O (µL) BSA Standard (µL) 1 x Bradford Reagent (µL) OD595nm Reading 0.00 0 500 25 975 0.00 0.025 25 475 25 975 0.43 0.05 50 450 25 975 0.45 0.1 100 400 25 975 0.469 0.15 150 350 25 975 0.571 0.2 200 300 25 975 0.621 0.3 300 200 25 975 0.638 0.4 400 100 25 975 0.713 1. Construct a standard curve and plot. 2. Your unknown sample yields...
Map A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas...
Map A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas chromotography using a chloroform internal standard. To begin, the researcher examined a sample containing 8.59 mg/L DDT standard and 1.60 mg/L chloroform as the internal standard, producing peak areas of 5101 and 10087, respectively. ns hhomed ts Then, the researcher collected 13.08 g of spinach, homogenized the sample, and extracted the DDT using an established method (assume 100% extraction), producing a 3.48 mL volume...
A researcher was attempting to quantify the amount of dichlorodiphenyltrichloroethane (DDT) in spinach with gas chromatography...
A researcher was attempting to quantify the amount of dichlorodiphenyltrichloroethane (DDT) in spinach with gas chromatography using a chloroform internal standard. To begin, the researcher examined a sample containing 7.88 mg/L DDT standard and 3.80 mg/L chloroform as the internal standard, producing peak areas of 3953 and 6281, respectively. Then, the researcher collected 9.16 g of spinach, homogenized the sample, and extracted the DDT using an established method (assume 100% extraction), producing a 3.24 ml volume of unknown sample. The...
which mechanisit causes band broadening? ornal standard. Compounds C and D gave the fol- mum speed,...
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A standard solution containing 5.6 10-8 M iodoacetone and 2.5 10-7 M p-dichlorobenzene (an internal standard)...
A standard solution containing 5.6 10-8 M iodoacetone and 2.5 10-7 M p-dichlorobenzene (an internal standard) gave peak areas of 306 and 877, respectively, in a gas chromatogram. A 3.00 mL unknown solution of iodoacetone was treated with 0.100 mL of 1.0 10-5 M p-dichlorobenzene and the mixture was diluted to 10.00 mL. Gas chromatography gave peak areas of 685 and 329 for iodoacetone and p-dichlorobenzene, respectively. Find the concentration of iodoacetone in the 3.00 mL of original unknown.
please show steps. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing...
please show steps.
A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 μg/mL and diluting the mixture to 50.0 mL. The measured signal quotient was (signal due to X/signal due to S) 1.690/1.000. what is the value of X in
A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 μg/mL and diluting the mixture to 50.0 mL. The measured signal...
Question: Prelab Question #2: A student has weighed out 850 mg of 1-pentanol in 50 mL...
Question:
Prelab Question #2: A student has weighed out 850 mg of 1-pentanol in 50 mL volumetric flask and prepared four standard solutions as described in this procedure. Calculate concentrations of 1-pentanol in mg/mL in each of these solutions. Instructional Videos to Watch before Lab Fundamentals of GC EXPERIMENTAL PROCEDURE Preparation of Solutions. Get a glassware bin from your TA. Rinse five 10 .00 mL volumetric flasks with 2-propanol (isoproponal) to remove any al cohols remaining in the nprevious usage....
In an HPLC analysis, 5.0 mg/L carotene standard sample gave a peak with a height of...
In an HPLC analysis, 5.0 mg/L carotene standard sample gave a peak with a height of 0.37, an area of 7859, and a retention time of 27.8 min. On the same chromatogram, the internal standard peak appeared at 24.3 min with a heigh of 0.21 and an area of 5268. An unknown sample was analyzed with the HPLC using the same method and gave three peaks in the chromatogram. Peak 1 has a height of 0.22, an area of 5713,...
1) Consider a buffer solution that is prepared by mixing 1000 mL of O.500 M NHs with 100.0 mL of0...
1) Consider a buffer solution that is prepared by mixing 1000 mL of O.500 M NHs with 100.0 mL of0.400 MNH CL Record all answers to at least 3 sig figs and watch out for rounding errors. la) Calculate the pH of this buffer lb) Calculate the pll of this buffer after 200 mg of NaOH is added to the original buffer solution in la. Ic) Calculate the pH of this buffer after 50 mL of0.200 M HCI is added...
Map A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas chromotography using a chloroform internal standard. To begin, the researcher examined a sample containing 8.59 mg/L DDT standard and 1.60 mg/L chloroform as the internal standard, producing peak areas of 5101 and 10087, respectively. ns hhomed ts Then, the researcher collected 13.08 g of spinach, homogenized the sample, and extracted the DDT using an established method (assume 100% extraction), producing a 3.48 mL volume...
A researcher was attempting to quantify the amount of dichlorodiphenyltrichloroethane (DDT) in spinach with gas chromatography using a chloroform internal standard. To begin, the researcher examined a sample containing 7.88 mg/L DDT standard and 3.80 mg/L chloroform as the internal standard, producing peak areas of 3953 and 6281, respectively. Then, the researcher collected 9.16 g of spinach, homogenized the sample, and extracted the DDT using an established method (assume 100% extraction), producing a 3.24 ml volume of unknown sample. The...
which mechanisit causes band broadening? ornal standard. Compounds C and D gave the fol- mum speed, whic 92-18. Internal ng HPLC results: lowing HPLC Concentration (mg/mL) in mixture 1.03 1.16 Compound matograph internal st for miz 30 (a) Draw structure (b) Inte partners (c) Ra matog P eak area (cm) 10.86 4.37 (d) G peaks deute A solution was prepared by mixing 12.49 mg of D plus 10.00 mL of unknown containing just C, and diluting to 25.00 mL. Peak...
please show steps.
A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 μg/mL and diluting the mixture to 50.0 mL. The measured signal quotient was (signal due to X/signal due to S) 1.690/1.000. what is the value of X in
A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 μg/mL and diluting the mixture to 50.0 mL. The measured signal...
Question:
Prelab Question #2: A student has weighed out 850 mg of 1-pentanol in 50 mL volumetric flask and prepared four standard solutions as described in this procedure. Calculate concentrations of 1-pentanol in mg/mL in each of these solutions. Instructional Videos to Watch before Lab Fundamentals of GC EXPERIMENTAL PROCEDURE Preparation of Solutions. Get a glassware bin from your TA. Rinse five 10 .00 mL volumetric flasks with 2-propanol (isoproponal) to remove any al cohols remaining in the nprevious usage....
1) Consider a buffer solution that is prepared by mixing 1000 mL of O.500 M NHs with 100.0 mL of0.400 MNH CL Record all answers to at least 3 sig figs and watch out for rounding errors. la) Calculate the pH of this buffer lb) Calculate the pll of this buffer after 200 mg of NaOH is added to the original buffer solution in la. Ic) Calculate the pH of this buffer after 50 mL of0.200 M HCI is added...
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