Which of the following studies WILL LEAST LIKELY use the standard chromatogram of caffeine? analysis of compounds in non-caffeinated beverages
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- Question 15 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 µL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Peak Area Benzoate Caffeine Aspartame Std 1 2.30 3.54 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…Question 13 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 µL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Peak Area Caffeine Benzoate Aspartame Std 1 2.30 3.54 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…Question 12 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Peak Area Benzoate Caffeine Aspartame Std 1 2.30 3.54 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…
- Analysis of a blood sample for inorganic phosphate gives (4.5, 4.20, 3.6, 4.17, 3.88) mg% phosphate. The value of Standard deviation = +- 0.573 a) True O b) False OBased on the given data, what is the λmax of cobalt? 0.1M Cobalt 300 0.451 325 0.467 350 0.584 375 0.629 400 0.694 425 0.673 450 0.541 475 0.433 500 0.423 525 0.327 550 0.264 575 0.245 600 0.233 625 0.211 650 0.189 675 0.187 700 0.165Question 14 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Caffeine Peak Area Benzoate 3.54 Aspartame Std 1 2.30 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…
- Question 16 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz 354.9 mL The following data were obtained: Peak Area Benzoate Caffeine Aspartame Std 1 2.30 3.54 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…Question 17 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Caffeine Peak Area Benzoate 3.54 Aspartame Std 1 2.30 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…Procedure needs use of 1.1 molar equivalent of benzyltriphenylphosphonium chloride (388.90) . How many grams must be use to accomplish it if 1.66 ml of benzaldehyde (106.12) is employed? Benzaldehyde density=1.04 answer two decimal
- Using the linear regression equation on the previous question, what is the concentration of the diluted KMnO4 solution? 216.15 mg/L 316.15 mg/L 416.15 mg/L 300.20 mg/L2. Several standards were chromatographed, 0.5 1.0 2.0 Conc (ug/ml) Peak area 5.0 10.1 17.2 and the results are shown below: 3.0 6.0 8.0 19.8 39.7 57.3 10.0 66.9 15.0 95.3 Graph using concentration as the X-axis and peak area as the Y-axis. Use Excel to determine the equation of the line. What type of standardization was used above?3What is the ratio strength of benzalkonium chloride in a nasal spray that contains 125 µg/mL of the ingredient? a 1:8 b 1:80 c 1:800 d 1:8000