Midterm

Question 0

Conductance

Answer 0

Siemens ( S )

Question 1

Activity( radionuclide )

Answer 1

Becquerel ( Bq )

Question 2

Resistance

Answer 2

Ohms

Question 3

Substance conc.

Answer 3

Mols per cubic meter

Question 4

Volume

Answer 4

Cubic meter

Question 5

Are obtain by combining 2 or more units by multiplication or division

Answer 5

SI derived units

Question 6

States that the analyze is directly proportional to the amount of light it absorbs

Answer 6

Beer’s law

Question 7

Is the term used to describe the monochromatic light this is absorbed by the sample and transmittance describes the light that passes through the sample

Answer 7

Absorbable ( OD )

Question 8

Visual colorimetry which solely on the human eye

Answer 8

Dubosq colorimeter

Question 9

A device for selecting a narrow band of wavelengths from a continuous spectrum

Answer 9

Monochromator

Question 10

When the absorbance increases exponentially with an increase in the light path this law is followed

Answer 10

Lambert law

Question 11

Incorporation of these two laws together with the contribution of blank

Answer 11

Bouguer

Question 12

Formula of absorbance OD

Answer 12

A= 2 - log%T

Question 13

Continuous spectrum examples

Answer 13

Filter ,Prism and Diffraction grating

Question 14

Photoelectric colorimetry which employs a photoelectric device

Answer 14

Leitz photrometer

Question 15

LambertlAw and contribution of bouguer

Answer 15

A= abc A= is for absorbance
a= absorptivity of the substance being measured
b= light in cm
c= conc. of the measured substance

Question 16

Beer-Lambert law formula

Answer 16

Au x Cs /As = Cu

Question 17

Two types of beer law

Answer 17

Duboscq colorimeter and Lietz photrometer

Question 18

This formula applied to assay exhibit linear relationship between changes in absorbance with changes in conc to calculate the conc of unknown

Answer 18

Au x Cs /As = Cu

Question 19

It minimizes stray light emitted by lamp and prevent scattered light from entering the monochromator

Answer 19

Entrance slit

Question 20

Does not provide a continuous spectrum ,emitting radiation at a specific wavelength

Answer 20

Mercury vapor lamp

Question 21

It controls the amount of emergent light that passes through the event

Answer 21

Exit slit

Question 22

This provide the radiant energy

Answer 22

Light source

Question 23

NIR

Answer 23

Near infrared

Question 24

Are used for work in the UV region with 200-375 nm range

Answer 24

Hydrogen and Deuterium lamps

Question 25

It sharply isolates specific wavelength of light which will made to pass the curvets

Answer 25

Monochromator

Question 26

Responds to the radiant energy it absorbs by emitting electrons in a proportional amount to the initial light absorbed

Answer 26

Photomultiplier tube

Question 27

Refers to the ability of the test to detect the smallest amount of the analyte In a solution or sample

Answer 27

Sensitivity

Question 28

Is a soln of a particular analyte of known characteristics and known value

Answer 28

Standard

Question 29

It holds the cuvet holding a soln containing the analytes to be measured

Answer 29

Cuvet holder

Question 30

Is the measurement of the amount of light scattered by particles in suspension

Answer 30

Nephelometry

Question 31

It converts light signal into an electral signal

Answer 31

Detector

Question 32

Are design with 256-2048 photodiode that are arrange in linear fashion

Answer 32

Photodiode array detector

Question 33

Cuvet holder for strongly acidic solution

Answer 33

Aluminosilicate glass cuvet

Question 34

It provides the actual value or numerical data needed in the calculation of the value of analyte present in the sample

Answer 34

Read out device

Question 35

Detector can be detected by

Answer 35

Galvanometer

Question 36

Is the measurement of the amount of light blocked by particulate matter

Answer 36

Turbidimetry

Question 37

A iron plate and a layer of selenium are partial description f the composition

Answer 37

Photocell or barrier layer cell

Question 38

Cuvet should be used for assays using wavelength range UV region 200-380

Answer 38

Plastic or quartz cuvet

Question 39

Occurs when a molecule absorbs light of a particular short wavelength and is thereby stimulated to emit light of longer wavelength

Answer 39

Fluorescence

Question 40

As light from a radiant energy source passes through an interference filter it is projected to the slide at a 45 degree angle

Answer 40

Reflectance spectrophotometry