A spectrophotometric method for the quantitative determination of the concentration of Pb2+ in blood yields an Ssamp of 0.133 for a 1 mL sample of blood that has been diluted to 6 mL. A second sample is spiked with 1 µL of a 1467 ppb Pb2+ standard and diluted to 6 mL, yielding an Sspike of 0.491. Determine the concentration of Pb2+ in the original sample of blood.

Q: A method for the analysis of Ca2+ in water suffers from an interference in the presence of Zn2+.…

A: Consider the concentration of Zn+2 = 1                The concentration of Ca+2 = 100  The given…

Q: The mass percent of Fe in an unknown salt sample was determined using both volumetric and gra…

A: We are given replicate values for the mass percent KHP for two different methods.  We can find…

Q: A student researcher performed a chromatographic separation of caffeine and aspartame. The retention…

A: Retention time for caffeine (tc) = 200.8 sbaseline peak width for caffeine (wc) = 16.1 sRetention…

Q: The Kjedahl procedure was used to analyze 256 µL of a solution containing 37.9 mg protein/mL. The…

A: NH3 +  HCl = NH4Cl HCl + NaOH = H2O  +   NaCl Here, one mole of NH3 reacts with one of  HCl and also…

Q: A solution with 0.083 7 M X and 0.050 0 M S9 gave areas AX = 423 and AS9 = 372. Then 10.0 mL of 0.05…

A: Given: A solution having 0.0837 M X and 0.0500 M S’ showed peak areas AX = 423 and AS’ = 372,…

Q: Consider a separation performed on a 30.0 mm long open tubular column with a 0.50 mm diameter and a…

A: Length of column(L) = 30.0 mmDiameter of column(d) = 0.50 mmThickness(t) = 2.0 micrometerRetention…

Q: A spectrophotometer method for the quantitative analysis of Pb2+ in blood uses Cu2+ as an internal…

A: given : SASIS = 0.8320.351= 2.37 CA = concentration of analyte = 1.75 CIS = concentration of…

Q: A sample of water from a river was analyzed by titrating a 125 mL aliquot with 0.0210 M EDTA,…

A: EDTA reacts with Ca in 1:1 ratio to form CaEDTA complex. By using definite concentration of EDTA ,…

Q: For this experiment I prepared two solutions: each was an injection of 15 microliters of pure acetic…

A: 1 μL = 10-6 L 1 L = 1000 mL Volume of acetic anhydride (MW = 102.09 g/mol) taken in mL, V = 15.9 μL…

Q: A solution contains 0.10 M Sr(NO3)₂ and 0.20 M Bi(NO3)₂. When solid Na AsO is added to the solution…

A: The question is based on the concept of solubility product principle. It states that when a weak…

Q: A student used 500mg of tabletop sweetener to make a total of 5ml of solution with biuret reagent.…

A: The student prepared a solution containing 500 mg of tabletop sweetener in a total volume of 5 mL.…

Q: A sample of drinking water was tested for Pb+ and was found to have a Pb²* concentration of 17.46…

A: Given the concentration of the unspiked sample, Cunspiked = 17.46 ppb Now 1.00 mL of 2.29 ppb Pb2+…

Q: An analyst determines the Ct content of rain water with ion chromatography. The data for the…

A: IntroductionAn analyst is using ion chromatography to determine the concentration of chloride ions…

Q: Water from Jordan Lake was analyzed for its Fe³+ content. A 20.0-mL sample of lake water was…

A: First, we have to calculate the value of the molar absorptivity constant, ε using the concentration…

Q: The answer is 0.372 ug/mL

A: Please see the attached image for the solution.  If there are queries or if the image is not…

Q: A student researcher performed a chromatographic separation of caffeine and aspartame. The retention…

A: Given tc = 209.6 sωc = 14.4 sta = 260.0 sωa = 21.2 sd = 22.1 s

Q: Tooth enamel is composed of the mineral hydroxyapatite, Ca5(PO4)3OH which has a Ksp of 6.8 x 10-37.…

A: Step 1: Step 2: Step 3: Step 4:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.