問題一覧
1
distance between two successive peaks and it is expressed in nanometers
wavelength
2
It determines the amount of light emitted by a molecule after excitation by electromagnetic radiation
fluorometry
3
used to break chemical bonds and form free, unexcited atom
flame
4
It determines the amount of light blocked (reduction of light) by a particulate matter in a turbid solution
turbidimetry
5
It is based on measuring changes in colligative properties of solutions that occur owing to variations in particle concentration.
osmometry
6
the measurement of light intensity in a narrower wavelength
spectrophotometric measurement
7
It determines the amount of scattered light by a particulate matter suspended in a turbid solution
nephelometry
8
The relationship between wavelength and energy is described by
planck’s formula
9
the number of vibrations of wave motion per second
frequency
10
nephelometry: Light scattered by particles is measured at an angle, typically ___
15-90 degrees
11
2 characteristics of electromagnetic waves
wavelength frequency
12
form of photometry which deals with the measurement of light transmitting power of a colored solution to determine the concentration of light-absorbing substances present within it
colorimetry
13
Excitation of electrons from lower to higher energy state (It measures the light emitted by a single atom burned in a flame)
flame emission photometry (FEP)
14
It uses two monochromators in FLUOROMETRY
primary and secondary filter
15
Element is not excited by merely dissociated from its chemical bond and placed in an unionized, unexcited, ground sta
AAS
16
selects the wavelength that is best absorbed by the solution to be measured
primary filter
17
prevents the incident light from striking the photodetector
secondary filter
18
How energy transmitted?
through electromagnetic waves
19
The unknown sample is made to react with a known solution in the presence of an indicator
volumetric
20
the measurement of light intensity using a specific wavelength
photometric measurement
21
The chemical reaction yields an electronically excited compound that emits light as it returns to its ground state, or transfers its energy to another compound, which then produces an emission
chemiluminescence