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Which of the following methods should be used to determine the concentration of the analyte when...
Question 2 2.5 p Which of the following methods should be used to determine the concentration...
Question 2 2.5 p Which of the following methods should be used to determine the concentration of the analyte when there is a significant "matrix effect" in the sample? Standard additions Calibration curve Spike recovery Internal Standard - Previous Next BY ADVANCED AUDIO TOSHIBA
You are measuring the calcium concentration of a well to determine how hard the water is....
You are measuring the calcium concentration of a well to determine how hard the water is. Which of the following measurement methods should you use to get the concentration of the calcium in the water using a calcium ion selective electrode A standard additions curve A calibration curve Neither Both
Use the following data to construct a spread sheet to determine the peak area ratio of the analyt...
Use the following data to construct a spread sheet to determine the peak area ratio of the analyte to the internal standard. Construct a calibration curve plotting the the peak ratio of the analyte to the internal standard versus the concentration. Determine the concentration of the unknown. Your spreadsheet needs to be turned in also. (12 pts) Percent analyte 0.01 0.04 0.12 0.22 0.54 unknown Peak Area 15 50.1 160 303 950 225 Internal standard area 25.1 30.2 26.7 22.4...
A stock solution of analyte is made by dissolving 34.83 mg of copper (II) acetate hexahydrate...
A stock solution of analyte is made by dissolving 34.83 mg of copper (II) acetate hexahydrate (fw = 289.73 g/mol) in 25.000 mL of water. A second stock solution of internal standard is made by dissolving 28.43 mg of germanium (I) acetate (fw = 190.74 g/mol) into 25.000 mL of water. These solutions are used to make a series of standards for flame atomic absorption analysis calibration. The standard solutions (each 10.00 mL total volume) should have the following concentrations...
1. Use the following data to construct a calibration curve and determine the concentration of unknown...
1. Use the following data to construct a calibration curve and determine the concentration of unknown as given. What is the molar absorptivity of the analyte? The compound solutions were measured in a 0.5 cm path length quartz cuvette. solution [X] (M) Absorbance At 254 nm Standard 1 Standard 2 Standard 3 Standard 4 Standard 5 Sample 0.03584 0.05719 0.1289 0.2305 0.3161 ??? 0.097 0.169 0.365 0.682 0.997 0.719
A Bill' external standard curve built from absorbance signal vs. analyte concentration (in uM) has the...
A Bill' external standard curve built from absorbance signal vs. analyte concentration (in uM) has the following calibration curve equation y = 0.0500 x + 0.003. If a sample produced an absorbance of 0.300, what was the Bi concentration in the solution in the cuvette? A. 0.015 mM B. 6.00 mm c. 5.94 mm D. 0.600 mm Reset Selection estion 4 of 5 2 Points If the concentration of Bi in a diluted sample (after dilution of the original sample)...
3) A student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV...
3) A student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light at 282 nm. Absorbance of Tryptophan in an unknown analyte sample previously diluted 1:8 was 0.673 at 282 nm. Calibration of UV-Vis spectrometer was performed by serial dilution of a Tryptophan standard (230 ppm). A student diluted standard in the following ratios: 1:10, 1:20, 1:50, 1:60 and 1:70 and determined Absorbances of 1.923, 0.942, 0.443, 0.367 and 0.294 respectively. What is the concentration...
3) A student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV...
3) A student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light at 282 nm. Absorbance of Tryptophan in an unknown analyte sample previously diluted 1:8 was 0.673 at 282 nm. Calibration of UV-Vis spectrometer was performed by serial dilution of a Tryptophan standard (230 ppm). A student diluted standard in the following ratios: 1:10, 1:20, 1:50, 1:60 and 1:70 and determined Absorbances of 1.923, 0.942, 0.443, 0.367 and 0.294 respectively. What is the concentration...
3)TA student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light...
3)TA student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light at 282 nm. Absorbance of Tryptophan in an unknown analyte sample previously diluted 1:8 was 0.673 at 282 nm. Calibration of UV-Vis spectrometer was performed by serial dilution of a Tryptophan standard (230 ppm). A student diluted standard in the following ratios: 1:10, 1:20, 1:50, 1:60 and 1:70 and determined Absorbances of 1.923, 0.942, 0.443, 0.367 and 0.294 respectively. What is the concentration of...
When deciding about the range of standard curve, which of the following should be considered? A...
When deciding about the range of standard curve, which of the following should be considered? A Sensitivity B. Upper/Lower Limit Time D Volume QUESTION 11 What does sensitivity of a spectrometer mean? A. The highest detectable level of the analyte distinguishable. B. The lowest detectable level of the analyte distinguishable from zero. C. The capacity to differentiate between two far apart concentrations of the analyte D. The capacity to differentiate between two very close concentrations of the analyte.
Question 2 2.5 p Which of the following methods should be used to determine the concentration of the analyte when there is a significant "matrix effect" in the sample? Standard additions Calibration curve Spike recovery Internal Standard - Previous Next BY ADVANCED AUDIO TOSHIBA
Use the following data to construct a spread sheet to determine the peak area ratio of the analyte to the internal standard. Construct a calibration curve plotting the the peak ratio of the analyte to the internal standard versus the concentration. Determine the concentration of the unknown. Your spreadsheet needs to be turned in also. (12 pts) Percent analyte 0.01 0.04 0.12 0.22 0.54 unknown Peak Area 15 50.1 160 303 950 225 Internal standard area 25.1 30.2 26.7 22.4...
1. Use the following data to construct a calibration curve and determine the concentration of unknown as given. What is the molar absorptivity of the analyte? The compound solutions were measured in a 0.5 cm path length quartz cuvette. solution [X] (M) Absorbance At 254 nm Standard 1 Standard 2 Standard 3 Standard 4 Standard 5 Sample 0.03584 0.05719 0.1289 0.2305 0.3161 ??? 0.097 0.169 0.365 0.682 0.997 0.719
A Bill' external standard curve built from absorbance signal vs. analyte concentration (in uM) has the following calibration curve equation y = 0.0500 x + 0.003. If a sample produced an absorbance of 0.300, what was the Bi concentration in the solution in the cuvette? A. 0.015 mM B. 6.00 mm c. 5.94 mm D. 0.600 mm Reset Selection estion 4 of 5 2 Points If the concentration of Bi in a diluted sample (after dilution of the original sample)...
3) A student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light at 282 nm. Absorbance of Tryptophan in an unknown analyte sample previously diluted 1:8 was 0.673 at 282 nm. Calibration of UV-Vis spectrometer was performed by serial dilution of a Tryptophan standard (230 ppm). A student diluted standard in the following ratios: 1:10, 1:20, 1:50, 1:60 and 1:70 and determined Absorbances of 1.923, 0.942, 0.443, 0.367 and 0.294 respectively. What is the concentration...
3)TA student needs to determine the concentration of Tryptophan (Try) amino acid that absorbs UV light at 282 nm. Absorbance of Tryptophan in an unknown analyte sample previously diluted 1:8 was 0.673 at 282 nm. Calibration of UV-Vis spectrometer was performed by serial dilution of a Tryptophan standard (230 ppm). A student diluted standard in the following ratios: 1:10, 1:20, 1:50, 1:60 and 1:70 and determined Absorbances of 1.923, 0.942, 0.443, 0.367 and 0.294 respectively. What is the concentration of...
When deciding about the range of standard curve, which of the following should be considered? A Sensitivity B. Upper/Lower Limit Time D Volume QUESTION 11 What does sensitivity of a spectrometer mean? A. The highest detectable level of the analyte distinguishable. B. The lowest detectable level of the analyte distinguishable from zero. C. The capacity to differentiate between two far apart concentrations of the analyte D. The capacity to differentiate between two very close concentrations of the analyte.
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