Structural elucidation of a sample component is possible through point estimation of its components with modern instrumentation methodologies. Additionally, characterization of their chemical nature is possible through qualitative analytical methods. A - If the first statement is TRUE and the second statement is FALSE B - If the first statement is FALSE and the second statement is TRUE C - If both statements are TRUE D - If both statements are FALSE

There is a Canvas AUDIO tutorial available for this problem. This question requires the use of a spread sheet (Excel) to calculate the LINEST uncertainty in the Linear Least Squares best fit line, and the associated unknown sample. You'll be reproducing the calculations in Figure 4-13 in the 7th Addition of Harris. The instructions for using LINEST are on the previous page. Here are mass spectrometric signals for methane in H2. CH4 (vol %): 0 0.062 0.122 0.245 0.486 0.971 1.921 Signal (mV): 9.1 47.5 95.6 193.8 387.5 812.5 1671.9 Construct a calibration curve: (a) Subtract the blank value (9.1) from all other values (this means that your first data point will be 0,0). Then use the LINEST calculation of least squares to find the slope and intercept and their uncertainties. slope 869 intercept (b) Replicate measurements of an unknown gave 152.1, 152.4, 153.9, and 152.7 mV, and a blank gave 9.1, 9.4, 10.6, and 9.0 mV. Subtract the average blank from the average unknown to find the average…

Explain solution

Kindly answer question i, ii, iii

A series of eight absorbance measurements using an atomic absorption spectrophotometer are as follows: 0.855, 0.836, 0.848, 0.870, 0.859, 0.841, 0.861, and 0.852. According to the instrument manufacturer, the precision of the absorbance measurements using this instrument should not exceed 1% relative standard deviation. Does it in this case?

Which of the following must be present for an analysis to be successful? I) High selectivity II) Low detection limit III) Linear operating range A.I, IIB.II, IIIC. I, IIID. I, II, III

Consider the following method for the analysis of cocaine (MW 303.35) powder. "Dissolve about 600 mg of cocaine, preciously dried and accurately weighed, in 50 mL of glacial acetic acid, add I drop of crystal violet TS, and titrate with 0.1 M perchloric acid VS to a green endpoint. Perform a blank determination, and make the necessary correction" Calculate the percentage purity of the cocaine sample from the data below. Show your reasoning clearly and record your final answer to four significant figures. CH₂ ● Cocaine powder weighed = 606.3 mg Concentration of HCIO3=0.09978 M H₂C-N- Volume HCIO3 required for the assay mixture = 19.97 mL ● Volume HCIO; required for blank determination = 0.059'mL

A compound Y is to be determined by UV-visible spectrophotometry. A calibration curve is constructed from standard solutions of Y with the following results: 0.20 ppm, A = 0.870; 0.40 ppm, A = 0.840; 0.60 ppm, A = 0.800; 0.80 ppm, A = 0.750; 1.00 ppm, A = 0.700; 1.50 ppm, A = 0.620; and 2.00 ppm, A = 0.530. a. What is the equation of the calibration curve for compound Y? b. What is the linearity of the calibration curve for compound Y?

Using the 13 rule and Hydrogen deficiency indicator (HDI) determine the Molecular formula and proposed which group of molecule does the subject molecule belong.

a) How does mass spectrometry identify organic compounds?  b) Describe the use and function of Quadrupole Analyzers ?  c) One of the ionization sources for atomic mass spectrometry (MS) is Inductively Coupled Plasma (ICP). Explain the need for an interface in the ICPMS instrument and how can it be achieved.