The absorbance (A) of the ibuprofen solution is
concentration-dependent (c, µg / ml) as follows:
A = 0.002391 · c - 0.003.
a) What is the concentration of the solution when the absorbance is
0.735?
b) What is the absorbance at 0.593 mg / ml solution?
The absorbance (A) of the ibuprofen solution is concentration-dependent (c, µg / ml) as follows: A...
1) A stock solution has a concentration of 100 µg/mL. If 20 µL of stock is added to a beaker. What is the mass of the dye in µg? 2) If the absorbance of the same dye (after diluted with water to 3 mL) is 0.3 AU, what is A/µg of the dye used?
How much ibuprofen solution (in mL) is needed to give a 250 mg dose if the concentration is 500 mg/ 5 mL
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)...
If a person’s blood cortisol concentration is 10 µg/mL, and 10 mg of cortisol can be excreted from the body in a 24-hour period, what volume of blood plasma in mL was “cleared” during this amount of time?
A parent diluted 1 mL ibuprofen oral drops (Infant's MOTRIN Concentrated Drops) with 15 mL of water prior to administering the medication. The con- centrated drops contain ibuprofen, 50 mg/1.25 mL. Calculate the concentration of ibuprofen in the dilution in (a) mg mL, and (b) as a percentage strength. 2
Assume that you have a stock solution of epinephrine at a concentration of 3 mg/mL. Knowing that the pipette you will use delivers 20 drops/mL, calculate the number of drops of the stock solution that must be added to a smooth muscle bath containing 27 mL of Locke’s solution so that the final concentration of epinephrine in the muscle bath will be 173 µg/mL.
The linear concentration range for the Bradford assay is 20-2000 µg/mL of protein. Protein concentrations below or above these ranges cannot be measured accurately. If it is suspected that a sample contains greater than 50 mg/mL of protein, how can the protein concentration still be measured using the Bradford assay? Explain.
A formula for morphine sulfate and ibuprofen injection for patient-controlled analgesia is as follows: Morphine sulfate 200 mg Ibuprofen 8 mg Lactic acid qs 0.9% sodium chloride injection qs 100 mL A patient has been prescribed 2 mg of morphine sulfate every 2 hours as needed for severe pain. The purpose of the lactic acid in this formulation is to adjust the pH to the range of 3 to 3.8, and lactic acid is supplied as an 85% w/w solution...
One of the common methods to quantify DNA is to measure A260 (UV absorbance at 260 nm) of DNA solution using a spectrophotometer. You took 10 µl of your plasmid DNA preparation and dilute with 990 µl of H2O. The A260of this diluted solution was 0.30. Calculate the concentration of your plasmid DNA preparation (before the dilution). It has been established that 50 µg/ml of double-stranded DNA gives A260 = 1.0. My plasmid DNA preparation is _____________________ mg/ml. From this...
Part C The absorbance of a cationieron) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 L of the sample and injecting it into a cuvette already containing 2.00 mL of water total volume is 200 ml + 100.0 L). The absorbance value of the diluted solution corresponded to a concentration of 7.84x10-6 M. What was the concentration...