Describe the application of AAS (Atomic Absorption Spectrophotometry) analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment
Q: A stock solution of analyte is made by dissolving 34.83 mg of copper (II) acetate hexahydrate (fw =…
A: Given, mass of copper (II) acetate hexahydrate =34.83 mg volume of water = 25.00 mL mass of…
Q: Copper was determined in a river water sample by atomic absorption spectrometry and the method of…
A:
Q: Lead in dry river sediment was extracted with 25 wt% HNO3 at incubation temperatures for 1 hr. Then…
A:
Q: Describe the principle and operation of anodic stripping voltammetry (ASV). How does it differ from…
A: Here we have to understand three points 1. Anodic Stripping Voltammetry (ASV) 2. adsorptive…
Q: The data in the table below were obtained during a determination of lead in lake water by atomic…
A: To find the equation of line, first input data in excel sheet then make a scatter plot for that data…
Q: The part of SEM that is responsible for the production of electrons. * Electron guns Condenser lens…
A: SEM ,TEM ,XPS are the analytical techniques used for surface analysis of samples.
Q: A sample of water from the North Sea was analysed by ion-chromatography and the sulfate…
A:
Q: A chemist received a report from an analysis involving the iron-phenanthroline method, containing…
A: A question based on absorption that is to be accomplished.
Q: B. The copper concentration in a contaminated salt sample was determined by flame atomic absorption…
A: #8: Flame atomic absorption spectroscopy is used to find the copper concentration in the…
Q: A student wanted to determine the level of lead in amoxicillin powder, so he transferred 148 mg of…
A: Given the absorbance of the diluted solution, Y = 0.48 Calibration equation is: Y = 12.25X - 0.05…
Q: I need help calculating the following values please!!!!!
A: 1.) Volume of EDTA used is calculated as : Final burette reading - Initial burette reading 2.)…
Q: Analytical Chemistry True or False Absorption is the process by which ions are retained on the…
A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…
Q: Many rivers in Ghana are affected by illegal small-scale mining. Studies have revealed extremely…
A: Before the industrial and medical purpose, polluted air must be undergone through various steps of…
Q: Chemistry tabulate between HLC and plasma radiation sources.
A: HLC stands for hollow cathode lamp which are used in atomic absorption instruments. Plasma radiation…
Q: What spectroscopic technique are you going to suggest to a mining company who wishes to determine…
A: A question based on spectroscopy, which is to be accomplished.
Q: To determine the concentration of these analyte ions in a mixture, the mixture absorbance is…
A: This is application of the Lambert beer law . Here we are required the molar concentration of X3+…
Q: An eggshell is treated with NaOH to remove the membrane, dried and found to weigh 5.131 g. The shell…
A:
Q: 10. The following buffered solutions of weak acid (FHA spectrophotometrically in 2.00 cm cells 1.00…
A: The indicator (absorbing species equilibrium) can be written as: HA+H2O↔H3O++A-…
Q: B. The copper concentration in a contaminated salt sample was determined by flame atomic absorption…
A: Here standard addition technique is used to standardize the copper sample in which to a fixed volume…
Q: The table shows a series of standard additions of Cu(II)to acidified tap water samples measured by…
A: The solution of the question is given below:
Q: Discuss the application of any three of the following analytical methods for gold, copper and iron…
A:
Q: Describe two applications of Potentiometric analysis
A: Potentiometric analysis is a process in which the potential of a substance is measured with respect…
Q: Sample preparation has been regarded as the main bottleneck in the development of sensitive,…
A: Sample preparation step is most important step in analysis of trace elements. Dissolution of…
Q: A graphite furnace atomic absorption spectrophotometer (AAS) was used to determine the arsenic (As)…
A: Given data Concentration Absorbance 2 0.17 4 0.28 6 0.48 8 0.53 10 0.72
Q: Using the absorbance of [FeSCN]+2 at the wavelength of maximum absorption which you obtained in part…
A: Interpretation: To find the value of molar extinction coefficient at maximum absorption. Given Data:…
Q: Mercury intoxication could cause tremendous harmful impacts to human, particularly nervous system…
A: There are numerous instrumental techniques for quantitative and qualitative determination of the…
Q: II. Determination of Total Hardness of Water Source of water sample: Volume of water sample 22.00 mL…
A: Given that, Volume of EDTA solution consumed (V1)=14.06mL Molarity of standard EDTA solution used…
Q: Determination of the concentration of Zn(II) in a sample of river water was carried out by the…
A:
Q: A 10 μL aqueous sample containing 1 attogram of Rb+ was injected into a graphite furnace atomic…
A: Given : Volume of solution = 10 μL = 0.01 mL (since 1 mL = 1000 μL )…
Q: The hardness of water is analyzed using titration. A liter of water sample from tap water found to…
A:
Q: 20 ml aliquot of drinking water containing Fe(II) and Fe (III) is treated with hydroquinone to…
A: Given Values: The initial volume of the sample = 20 ml The final volume of the sample while…
Q: Please complete Table 2 and show the calculations for protein concentration and the concentration of…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: The determination of iron in wines was carried out by atomic absorption spectrophotometry, using the…
A: The conversion relations for the concentration term are shown below.
Q: Anionic surfactants in wastewater are measured spectrophotometrically as methylene blue active…
A: Given: Limit of surfactant content in Philippine class B water is 300 ppb
Q: Name the ionization techniques for solid and liquid samples.
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: use analytical separation and analyses to outline analytical separation method protocols that can be…
A: It has become an important need to prevent water pollution by removing all contaminants. Water is…
Q: A sample of water from the North Sea was analysed by ion-chromatography and the suifate…
A: On mixing two aqueous solutions, if a solid is separated out then the reaction is termed as…
Q: One common way to determine phosphorus is by mixing 12-molybdophosphate complex with ascorbie acid…
A: A graph based on Beer-Lambert law, which is to be accomplished.
Q: What are the advantages and disadvantages of using external standards in
A:
Q: List three typical examples applications of SFC analysis.
A: SFC analysis refers to Supercritical fluid chromatography analysis. It is an analytical method that…
Q: Many rivers in Ghana are affected by illegal small-scale mining. Studies have revealed extremely…
A: Before the industrial and medical purpose, polluted air must be undergone through various steps of…
Q: Graphite furnace atomizers are renowned in Atomic Absorption Spectrometry for their exceptionally…
A: Atomic Absorption Spectrometry : It is a spectroanalytical technique to quantitatively determine…
Q: For each of the following statements, answer True or False and explain your answer briefly. It is…
A: Color test and micro-crystalline test are used to find the drug present in the system. Different…
Q: Discuss the application of any three of the following analytical methods for gold, copper and iron…
A: MINERAL EXPLORATION: The process of finding out the traces of any mineralization present in the…
Q: A 0.2650 g rock sample of unknowm concentration was dissolved in HCI and diluted to 100.0 mL.…
A: The concentration of added standard Ca is calculated: [Ca] = C1 * V1 / V2 = 2.08 ug / mL * 5 mL /…
Q: Mass spectrometric measurements of zinc near the detection limit gave the following counts: 75.1,…
A: Solution - According to the question - Given - detection limit = 3s/m Formulas - ysample -yblank =…
Q: A forensic investigation was carried out to determine the amount of gun-shot residue on a small…
A: Concentration of solution is the amount of solute present per unit volume or mass of solution. In…
Describe the application of AAS (Atomic Absorption Spectrophotometry) analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment.
Step by step
Solved in 3 steps
- Assume for the following situations that Beer’s law remains linear. For (a) and (b), indicate whether the extinction coefficient ε, path length b, or concentration C is changing, and how it will change the absorbance of the solution. (a) A sample is moved from a test tube that is 1.0cm wide to a test tube that is 1.5cm wide. (b) A sample is diluted by adding enough solvent to double its volume. (c) A solution of iron (III) chloride appears brown when in high enough concentrations. In a 1.0 cm cuvet, the absorbance of 334 nm light by a 5.4 × 10−4 M solution of FeCl3 is measured to be 1.05. What is the extinction coefficient of the FeCl3 complex at this wavelength? (d) A sample containing an unknown concentration of FeCl3 is measured to have an ab- sorbance of 0.43 at 334 nm in a 1.0 cm cuvet. What is the molar concentration of the solution?Atomic Spectroscopy (a) In terms of spectral shape, how are atomic spectra different from molecular spectra? What is the source of this difference? (b) Describe the decision-making process for picking a line for atomic emission analysis of a given analyte. (c) For quality assurance, spike recovery is not sufficient to establish confidence in an analytical procedure. Explain this statement. What should be done instead to demonstrate satisfactory performance of an instrumental method (including elemental analysis). (d) Find a literature example of atomic spectroscopy used for elemental analysis. State the operating conditions with sufficient detail to reproduce the analysis; Please answer very soon will give rating surely All questions complete Answer needed Please help meA standard iron solution was prepared by dissolving 0.0140 g of pure iron in acid then transferring to a 50.00 mL volumetric flask with orthophenanthroline as a complexing agent. At a wavelength of 540 nm, the absorbance of the standard was 0.214 in a 1.00 cm cuvette. A 0.128 g sample of an iron ore was crushed and digested in 5 mL of concentrated acid. The digested sample was then transferred to a 10.00 mL volumetric flask and diluted to the mark with water. A 1.00 mL aliquot of the sample was transferred to a 25.00 mL volumetric flask, and diluted to the mark with water. A portion of the diluted sample was then transferred to a 1.00 cm cuvette and measured at a wavelength of 540 nm. The resulting absorbance was 0.216. Determine the % w/w of Fe in the iron ore.
- (5) A sample of sodium phosphate is dissolved in water to give 100.00 mL of solution (Solution A). Then this solution is diluted 5 times to give the final solution (Solution B). Solution B is Known to contain 3.920 x 1022 number of PO43- ions, which has an absorption peak at 460 nm and absorbance value of 0.355 in a 1.000 cm cuvette. (i) Calculate the molar absorptivity of Solution B. (ii) What mass of sodium phosphate (MM 163.94 g/mol) dissolved in Solution A.UV-Vis spectrophotometry is used to determine copper. Aside from UV-Vis spectrophotometry what other techniques can be used to determine copper. Explain the process and how it is doneA chemist obtained the following data for percent lindane in the triplicate analysis of an insecticide preparation: 7.23, 6.95, and 7.53%. Calculate the 90% confidence interval for the mean of the the three data, assuming that (a) the only information about the precision of the method is the precision for the three data. (b) on the basis of long experience with the method, it is believed that s---->σ lindane. (c) If s=0.28 is good estimate of σ, how many replicate measurement should be made in order for the mean for the analysis of sample to be within 0.2% of the true mean 90% of the time.
- To quantify the Cadmium content in a water sample, 5 aliquots of 10 mL were taken, adding to each one of them a volume of a standard solution of Cd (2 mg / mL); after the addition the final volume for all solutions was 50 mL. The absorbance reading was taken in an Atomic Absorption spectrophotometer, the data recorded were: Aliquot 1 2 3 4 5 Cd solution (mL) 0 1 2 3 4 Absorbance 0.163 0.240 0.319 0.402 0.478 Calculate the ppm of Cd.A spectrophotometric method for the analysis of iron has a linear calibration curve for standards of 0.00, 5.00, 10.00, 15.00, and 20.00 ppm. An iron ore sample with an expected iron content of 40–60% w/w is to be analyzed by this method. An approximately 0.5-g sample is taken, dissolved in a minimum of concentrated HCl, and diluted to 1 L in a volumetric flask using distilled water. A 5.00-mL aliquot is removed with a pipet. To what volume (10, 25, 50, 100, 250, 500, or 1000 mL) should it be diluted to minimize the uncertainty in the analysis? Explain.Discuss the application of any three of the following analytical methods for gold, copper and iron ore deposit evaluation which involve surface and subsurface geochemical sampling in a tropical environment. Neutron Activation Analysis (NAA) ICP-MS (Inductively Couple Plasma -Mass Spectrometry ES) ICP-ES (Inductively Couple Plasma Emission Spectrometry Electron microprobe analysis The Ion microprobe Fire assay XRF (X-Ray Fluorescence) AAS (Atomic Absorption Spectrophotometry)
- A student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505 nm. She created a calibration plot with the best-fit line of y = 9372 x + 0.0539. She measured the absorbance of her diluted unknown sample solution as (4.69x10^-1) nm. If she prepared her diluted sample solution by diluting 10.00 mL of the original solution to a total volume of 50.00 mL with deionized water, what is the concentration of Fe2+ in her original solution? Answer in units of M. Note: Your answer is assumed to be reduced to the highest power possible.The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.392. The slope-intercept form of the equation of the line is y = 4538.1x +0.0077. The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe³+ concentration of the unknown solution? [Fe³+] = mol/L Absorbance Iron(III) thiocynate standard curve 1.0 V 0.5 0.0001 Fe³+ concentration (M) 0 0.0002The determination of iron in wines was carried out by atomic absorption spectrophotometry, using the standard addition method. To do this, 10 mL of wine were placed in five 50 mL volumetric flasks; then 0, 5, 10, 15 and 20 mL of a 10 ppm iron standard solution were added to each of them. Next, they were gauged with distilled water and the absorbance was measured, obtaining the values of 0.040, 0.062, 0.081, 0.102 and 0.125 respectively. Calculate the regression parameters and obtain the iron concentration in the wine, in µg / mL.