Electrospray time‑of‑flight (TOF) mass spectrometry was used to analyze the eluate from a high‑performance liquid chromatography...
Electrospray time‑of‑flight (TOF) mass spectrometry was used to analyze the eluate from a high‑performance liquid chromatography (HPLC) separation. The mass spectrum of one chromatographic peak, containing a protein of unknown molecular mass, displays MHn+n peaks at m/z= 6710.365, 6263.085, 5871.757, 5526.428, 5219.496, and 4944.856. Find the average molecular mass (M) of the neutral protein and its standard deviation.
Homework Answers
Add Answer to:
Electrospray time‑of‑flight (TOF) mass spectrometry was used to
analyze the eluate from a high‑performance liquid chromatography...
Electrospray time‑of‑flight (TOF) mass spectrometry was used to analyze the eluate from a high‑performance liquid chromatography...
Electrospray time‑of‑flight (TOF) mass spectrometry was used to analyze the eluate from a high‑performance liquid chromatography (HPLC) separation. The mass spectrum of one chromatographic peak, containing a protein of unknown molecular mass, displays MHnn+ peaks at m/z= 6636.908, 6194.524, 5807.480, 5465.932, 5162.360, and 4890.726. Find the average molecular mass (M) of the neutral protein and its standard deviation.
A forensic chemist runs High-Performance Liquid Chromatography-Mass Spectrometry (HPLC- MS) on seven hair samples from the...
A forensic chemist runs High-Performance Liquid Chromatography-Mass Spectrometry (HPLC- MS) on seven hair samples from the same individual, suspect to contain traces of cocaine. The following concentrations were obtained in pg/mg: 1.8, 1.4, 0.75, 1.3, 1.6, 1.5, 1.7. Using the Grubb’s test, are there any outliers in the data? Show your work
25-25. Chromatography-mass spectrometry. Cocaine metabolism in rats can be studied by injecting the drug and periodically...
25-25. Chromatography-mass spectrometry. Cocaine metabolism in rats can be studied by injecting the drug and periodically withdrawing blood to measure levels of metabolites by HPLC-mass spectrometry. For quantitative analysis, isotopically labeled internal standards are mixed with the blood sample. Blood was analyzed by reversed-phase chro- matography with an acidic eluent and atmospheric pressure chemical ionization mass spectrometry for detection. The mass spectrum of the collisionally activated dissociation products from the m/z 304 positive ion is shown in the figure on...
An acceleration voltage of 30.0 kV is used to accelerate ions into the 1.54 m flight tube of a time‑of‑flight (TOF) mass...
An acceleration voltage of 30.0 kV is used to accelerate ions into the 1.54 m flight tube of a time‑of‑flight (TOF) mass spectrometer. The frequency at which spectra can be recorded is dependent on how long it takes the slowest ion to travel from the source to the detector. If you wish to scan up to ?/?m/z 6801 at what frequency (spectra/s) could spectra be recorded if a new spectrum begins each time the slowest ion reaches the detector? frequency:................spectra/s
Mass Spectrometry Part A: Match each statement with the term it most closely matches. A Hard...
Mass Spectrometry Part A: Match each statement with the term it most closely matches. A Hard ionization B Electrospray Ionization (ESI) C Molecular ion peak D Ion-Trap E Fast atom bombardment (FAB) F Time of Flight (TOF) G Base peak H Quadrupole I Soft ionization J Matrix-Assisted Laser Desorption/Ionization (MALDI) K Magnetic sector 1. ___ This ionization technique is used to analyze large, non-volatile molecules. The analyte is dissolved in a liquid matrix and placed on a target where it...
1. Gas chromatography is commonly used to _____________? a) To check the purify of a volatile...
1. Gas chromatography is commonly used to _____________? a) To check the purify of a volatile liquid sample, such as those obtained from a fractional distillation b) To check the identity of an unknown substance by comparing its GC with the GC of a known c) To analyze the components of a mixture for the presence or absence of a substance 2. All of the answers are applicable How many type of nonequivalent protons are in the following molecule? CH3CH2OCH2CH3...
25-25. Chromatography-mass spectrometry. Cocaine metabolism in rats can be studied by injecting the drug and periodically withdrawing blood to measure levels of metabolites by HPLC-mass spectrometry. For quantitative analysis, isotopically labeled internal standards are mixed with the blood sample. Blood was analyzed by reversed-phase chro- matography with an acidic eluent and atmospheric pressure chemical ionization mass spectrometry for detection. The mass spectrum of the collisionally activated dissociation products from the m/z 304 positive ion is shown in the figure on...
Most questions answered within 3 hours.
-
Maria has classic hemophilia, an x-linked recessive disease.
Could Maria have inherited the gene for this...
asked 16 minutes ago -
A Southwest Energy Company pipeline
has 3 safety shutoff valves in case the line springs a...
asked 16 minutes ago -
11)IfA, B and Care mutually exclusive and exhaustive events and P(A)= P (B)= P(C, find P (A), P (B) and P (C)
asked 1 hour ago -
Three persons A, Band C are simultaneously shooting a target. Probability ofA hitting the target is that of B is and that ofC is 2/3 Find the probability (i) exactly one of them will hit the target (ii) at least one of them will hit the target. (i) P (eY
asked 1 hour ago -
9)A candidate is selected for interview for three posts. For the first post there are 3 candidates, for the second there are 4 and for the third there are 2. What are the chances ofhis getting at least one post?
asked 1 hour ago -
8)Given A, B, Care independent events P (A) =.3, P (B) =.2 and P(C)=4. Find the probability for (a) all occuring (b) none occuring () at least one occuring (d) exactly one occuring
asked 1 hour ago -
6)Acertain player say X, is known to win with probability 0.3 if the track is fast and 0. 4 if the track is slow. For Monday there is a 0.7 probability ofa fast track and 0.3 probability of a slow track. What is the probability that player X will win on M
asked 1 hour ago -
Write a program that reads a sentence input from the user. The
program should count the...
asked 3 hours ago -
As noted in this chapter, C and C++ make a distinction between a
declaration and a...
asked 4 hours ago -
What is triple equality of S8 and Al2 from equation
,Al+S8 - Al2S3 and molar mass
asked 3 hours ago -
Why would a person own all of the stock of two companies (1) a
manufacturer of...
asked 3 hours ago -
whats the status of bitcoin vs the bitcoin cash fork? who
favored the fork and who...
asked 3 hours ago