anch

50問 • 1年前

Reviewer

通報

問題一覧

GD-AES combines the advantages of ______________ and ____________.

ICP-OES and XRF

Glow discharge optical emission spectrometry (GD-OES) is a widely used tool for fast measurements of _____ profiles.

Depth

It is a technique in which the composition of elements in samples, mostly water-dissolved, can be determined using plasma and a spectrometer.

Inductively Coupled Plasma Optical Emission Spectrometry

It is a technique capable of providing information about the elemental and isotopic composition of samples in situ from a few micrometers down to the sub-micron scale.

Secondary Ion Mass Spectrometry

This technique is an ideal tool to investigate from the surface down to more than 150 microns with a depth resolution that can be as good as 1 nm.

Glow Discharge Atomic Emission Spectrometry

This type of Plasma Emission Source has a distinct advantage; stability with varying sample matrices, a characteristic which is particularly valuable where the solvent contains a high concentration of dissolved solids.

Direct Current Plasma Source

This type of Plasma Emission Source uses an ion source that consists of a torch that is surrounded by a radio frequency generator that ionises argon gas inside the torch to form a high-temperature (up to 10,000 K) plasma that can be used to ionise analytes.

Inductively Coupled Plasma Torch

It is a part of the Plasma Emission Spectrometer which is used in the dispersion of the emitted radiation and in the presentation of the analytical signal.

Both A and B

In Sample Introduction for Plasma Sources, sample solution is pumped by a peristaltic pump at a fixed rate and converted into an aerosol by a _________.

Nebulizer

Plasma Emission Spectrometry is enormous and is most helpful in almost every field where ______analysis is carried out.

Trace Element

An elemental analysis technology capable of detecting most of the periodic table of elements at milligram to nanogram levels per liter.

Inductively Coupled Plasma Mass Spectrometry

Instrument that works on the principle of compound ionization and fragmentation (typically through the bombardment by electrons or selected ions), the physical separation of the charged fragments, and their detection.

Mass Spectrometer

An analytical technique that can be used to measure elements at trace levels in biological fluids.

Inductively Coupled Plasma Mass Spectrometry

Which part of the ICP Mass Spectrometer carries the argon (Ar) that forms the plasma?

ICP torch

An ionised gas, consisting of positively-charged ions and free (unbound) electrons.

Plasma

Principal Zone of Flames where combustion, atomization and thermal excitation occur.

Both Inner Cone and Primary Reaction Zone (A and C)

Flame Emission Spectrometry is a particularly useful technique for the determination of volatile elements with high excitation energies such as the alkali and alkaline earth metals.

False

FES Principle: Emission of electromagnetic radiation in the visible and infrared regions of the spectrum by atoms after electronic excitation in flames.

False

This interference may arise from the close proximity of other emission lines or bands to the analyte line or by overlap with it.

Spectral Interference

This interference occurs because of interaction with ground state atoms of the analyte in the cooler outer fringes of the flame (commonly encountered with easily ionized elements such as alkali metals and alkaline earths) and results in attenuation of the intensity of emission.

Self Absorption

True or False: The principle of AAS is absorption of electromagnetic radiation in the visible and infrared regions of the spectrum by atoms resulting in changes in electronic structure.

False

True or False: One disadvantage of AAS is that it is generally less sensitive than flame emission because the vast majority of atoms produced in the usual propane or air acetylene flame remain in the ground state available for light absorption.

False

True or False: Doppler broadening results from the rapid motion of atoms as they emit or absorb radiation.

True

The radiation emitted as a result of absorption (fluorescence) is measured, often at right angles to avoid measuring the source radiation.

Emission

It is the characteristic of the atoms which have absorbed the primary radiation.

Fluorescent Radiation

Part of AF Spectrometer that collects fluorescence radiation.

Detection System

Generally employed for the routine analysis of specific elements.

Filter based instruments

A wide range of energy transitions (wavelength) and consequently a continuum of X-ray emissions.

White X-Ray

A fluorescent (or secondary) X-ray emitted from a sample when it is excited by a primary X-ray source.

X-Ray Fluorescence

This X-Ray Emission method have a wide application in routine industrial analysis particularly in mineral processing and metallurgy.

X-Ray Fluorescence

A quantitative analysis wherein excitation occurs when an electron residing in a low-energy molecular or atomic orbital is promoted to a higher-energy orbital.

Visible and UV Spectrometry

Unsaturated organic functional groups that absorb in the ultraviolet or visible regions.

chromophore

Saturated groups containing heteroatoms which modify the absorption due to a chromophore.

auxochrome

The shortest wavelength (highest energy) emission, which arises from the transition to the lowestvibrational level in the ground electronic state.

resonance fluorescence

A general term for relaxation in which radiation of a longer wavelength (lower energy) than that originally absorbed is reemitted.

photoluminescence

For ___________, the complexity of the spectrum increases rapidly with the number of atoms N in the molecule.

Polyatomic Molecule

The classical analogy of a vibrating ________ is that of two weights connected by a spring.

Diatomic Molecule

Spectra are usually recorded as liquids, solids or in solution.

Polyatomic Molecule

A __________ behaves rather differently in that the forces of internuclear repulsion arising when the bond is compressed build up rapidly whilst, on stretching, the bond weakens and may finally disrupt.

Diatomic Molecule

Occurs if samples are exposed to the full power of an ultraviolet or visible source.

Photochemical decomposition

Observed only if the chemical shift difference between the coupled groups is large compared to the coupling constant.

First Order Spectrum

Chemical shifts between 13C nuclei in different chemical environments can differ by as much as 200 ppm whereas proton shift differences are seldom more than 10 ppm.

Carbon 13 NMR

Allows only the coupling between 13C nuclei and protons directly bonded to them to be observed.

Off Resonance Decoupling

Consists of irradiating the sample over a wide frequency range covering all the proton resonances in thesample.

Noise Decoupling

Absorption bands arising from adjacent protons are split into multiplet peaks by a mutual interaction of the spins.

Spin spin coupling

In __________, the sample is subjected to a series of single (several microseconds duration), high-power RF pulses of wide frequency range which excite all the nuclei of a particular element (isotope).

Pulsed Fourier Transform NMR

Identifies the specific protons attached to each carbon-13 (1H–13C connectivities)

Heteronuclear Chemical Shift Correlation Spectrometry

Provides proton-proton coupling information (1H– 1H connectivities).

Homonuclear Correlation Spectroscopy

Identifies directly bonded 13C nuclei (13C– 13C connectivities) which allows the carbon skeleton of a compound to be elucidated.

Incredible natural abundance double quantum transfer experiment

Correlated Spectroscopy is also known as

Homonuclear Correlation Spectroscopy

PMLS

Reviewer · 87問 · 2年前

PMLS

87問 • 2年前

Reviewer

ANAPHY

Reviewer · 101問 · 2年前

ANAPHY

101問 • 2年前

Reviewer

Anaphy P2

Reviewer · 100問 · 2年前

Anaphy P2

Anaphy P2 (2)

Anaphy P2 (2)

Contemporary World

Contemporary World

Pmls P2

Pmls P2

hes p3

Reviewer · 100問 · 1年前

hes p3

Anachem

Anachem

sjc l1

sjc l1

bio lab1 pic

bio lab1 pic

sjc L2

sjc L2

Biostat L3

Biostat L3

sjc L3&L4

sjc L3&L4

HIS L3

HIS L3

HIS L4

HIS L4

HIS L5

HIS L5

HIS L3

HIS L3

PSTM L3-L5

PSTM L3-L5

P1 Reviewer

P1 Reviewer

CPH P2

CPH P2

P2 Mod

P2 Mod

ANCH P2

ANCH P2

ANCH P2 MOD

ANCH P2 MOD

CPH

CPH

HIS

HIS

CFU ANCH P1-P3

CFU ANCH P1-P3

ANCH P2 Terms

ANCH P2 Terms

BIOSTAT FINALS (1)

Reviewer · 100問 · 1年前

BIOSTAT FINALS (1)

BIOSTAT FINALS (2)

BIOSTAT FINALS (2)

BIOSTAT FORMULA

BIOSTAT FORMULA

CFU CPH 1-5

CFU CPH 1-5

CFU CPH 6-16

CFU CPH 6-16

CFU CPH 17-23

CFU CPH 17-23

CFU HIS P1

CFU HIS P1

CFU HIS P2

CFU HIS P2

CFU HIS P3

CFU HIS P3

BIOSTAT FORMULA

BIOSTAT FORMULA

Mod 1-7

Mod 1-7

Mod 1

Mod 1

Mod 2

Mod 2

Mod 3

Mod 3

Mod 4

Mod 4

Mod 6

Mod 6

Mod 1-6

Mod 1-6

Mod 7

Mod 7

Mod 1

Mod 1

Mod 2

Mod 2

Mod 3

Mod 3

Mod 4

Mod 4

Mod 5

Mod 5

Mod 6

Mod 6

Mod 1-7

Mod 1-7

Mod 1

Mod 1

Mod 2

Mod 2

Mod 3

Mod 3

Mod 4

Mod 4

Mod 5

Mod 5

Mod 6

Mod 6

Mod 7

Mod 7

Mod 1

Mod 1

Mod 2

Mod 2

Mod 3

Mod 3

Mod 1

Mod 1

Mod 7

Mod 7

Mod 6

Mod 6

Mod 1

Mod 1

Mod 5

Mod 5

Mod 2

Mod 2

Mod 4

Mod 4

Mod 7

Mod 7

Mod 5

Mod 5

Mod 6

Mod 6

Mod 2

Mod 2

Mod 3

Mod 3

Mod 4

Mod 4

Mod 5

Mod 5

Lab Management

Lab Management

Biochemistry

Biochemistry

Cytogenetics

Cytogenetics

問題一覧

GD-AES combines the advantages of ______________ and ____________.

ICP-OES and XRF

Glow discharge optical emission spectrometry (GD-OES) is a widely used tool for fast measurements of _____ profiles.

Depth

It is a technique in which the composition of elements in samples, mostly water-dissolved, can be determined using plasma and a spectrometer.

Inductively Coupled Plasma Optical Emission Spectrometry

It is a technique capable of providing information about the elemental and isotopic composition of samples in situ from a few micrometers down to the sub-micron scale.

Secondary Ion Mass Spectrometry

This technique is an ideal tool to investigate from the surface down to more than 150 microns with a depth resolution that can be as good as 1 nm.

Glow Discharge Atomic Emission Spectrometry

Direct Current Plasma Source

Inductively Coupled Plasma Torch

It is a part of the Plasma Emission Spectrometer which is used in the dispersion of the emitted radiation and in the presentation of the analytical signal.

Both A and B

In Sample Introduction for Plasma Sources, sample solution is pumped by a peristaltic pump at a fixed rate and converted into an aerosol by a _________.

Nebulizer

Plasma Emission Spectrometry is enormous and is most helpful in almost every field where ______analysis is carried out.

Trace Element

An elemental analysis technology capable of detecting most of the periodic table of elements at milligram to nanogram levels per liter.

Inductively Coupled Plasma Mass Spectrometry

Mass Spectrometer

An analytical technique that can be used to measure elements at trace levels in biological fluids.

Inductively Coupled Plasma Mass Spectrometry

Which part of the ICP Mass Spectrometer carries the argon (Ar) that forms the plasma?

ICP torch

An ionised gas, consisting of positively-charged ions and free (unbound) electrons.

Plasma

Principal Zone of Flames where combustion, atomization and thermal excitation occur.

Both Inner Cone and Primary Reaction Zone (A and C)

Flame Emission Spectrometry is a particularly useful technique for the determination of volatile elements with high excitation energies such as the alkali and alkaline earth metals.

False

FES Principle: Emission of electromagnetic radiation in the visible and infrared regions of the spectrum by atoms after electronic excitation in flames.

False

This interference may arise from the close proximity of other emission lines or bands to the analyte line or by overlap with it.

Spectral Interference

Self Absorption

True or False: The principle of AAS is absorption of electromagnetic radiation in the visible and infrared regions of the spectrum by atoms resulting in changes in electronic structure.

False

True or False: Doppler broadening results from the rapid motion of atoms as they emit or absorb radiation.

True

The radiation emitted as a result of absorption (fluorescence) is measured, often at right angles to avoid measuring the source radiation.

Emission

It is the characteristic of the atoms which have absorbed the primary radiation.

Fluorescent Radiation

Part of AF Spectrometer that collects fluorescence radiation.

Detection System

Generally employed for the routine analysis of specific elements.

Filter based instruments

A wide range of energy transitions (wavelength) and consequently a continuum of X-ray emissions.

White X-Ray

A fluorescent (or secondary) X-ray emitted from a sample when it is excited by a primary X-ray source.

X-Ray Fluorescence

This X-Ray Emission method have a wide application in routine industrial analysis particularly in mineral processing and metallurgy.

X-Ray Fluorescence

A quantitative analysis wherein excitation occurs when an electron residing in a low-energy molecular or atomic orbital is promoted to a higher-energy orbital.

Visible and UV Spectrometry

Unsaturated organic functional groups that absorb in the ultraviolet or visible regions.

chromophore

Saturated groups containing heteroatoms which modify the absorption due to a chromophore.

auxochrome

The shortest wavelength (highest energy) emission, which arises from the transition to the lowestvibrational level in the ground electronic state.

resonance fluorescence

A general term for relaxation in which radiation of a longer wavelength (lower energy) than that originally absorbed is reemitted.

photoluminescence

For ___________, the complexity of the spectrum increases rapidly with the number of atoms N in the molecule.

Polyatomic Molecule

The classical analogy of a vibrating ________ is that of two weights connected by a spring.

Diatomic Molecule

Spectra are usually recorded as liquids, solids or in solution.

Polyatomic Molecule

Diatomic Molecule

Occurs if samples are exposed to the full power of an ultraviolet or visible source.

Photochemical decomposition

Observed only if the chemical shift difference between the coupled groups is large compared to the coupling constant.

First Order Spectrum

Chemical shifts between 13C nuclei in different chemical environments can differ by as much as 200 ppm whereas proton shift differences are seldom more than 10 ppm.

Carbon 13 NMR

Allows only the coupling between 13C nuclei and protons directly bonded to them to be observed.

Off Resonance Decoupling

Consists of irradiating the sample over a wide frequency range covering all the proton resonances in thesample.

Noise Decoupling

Absorption bands arising from adjacent protons are split into multiplet peaks by a mutual interaction of the spins.

Spin spin coupling

Pulsed Fourier Transform NMR

Identifies the specific protons attached to each carbon-13 (1H–13C connectivities)

Heteronuclear Chemical Shift Correlation Spectrometry

Provides proton-proton coupling information (1H– 1H connectivities).

Homonuclear Correlation Spectroscopy

Identifies directly bonded 13C nuclei (13C– 13C connectivities) which allows the carbon skeleton of a compound to be elucidated.

Incredible natural abundance double quantum transfer experiment

Correlated Spectroscopy is also known as

Homonuclear Correlation Spectroscopy