Exam 2

Chemistry 1010 with Melanie_dianda at Bowling Green State University

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By: Chad Love
Created: 2010-10-03
Size: 77 flashcards
Views: 20

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Detection limit (LOD)

•is the smallest quantity of analyte that is “significantly different” from the blank (3 x the noise)

Lower limit of quantitation (LOQ)

•is the smallest amount of analyte that can be measured with reasonable accuracy (10 x the noise)

Mobile phase

•the part of the chromatographic system that moves from the site of injection to the site of the detector; is a gas in GC and a liquid in TLC, LC, & HPLC

Stationary phase

the part of the chromatographic system that remains fixed;

Qualitative

analysis gives the identity of the chemicals in the sample

Quantitative

analysis is the determination of the amount and/or concentration of each component of a sample

K/Kilo

1,000

d/ deci

0.1

c/centi

0.01

M/milli

0.001

1,000ml

1,000 cm3

Physical properties

describing a substance w/out reference to any other substance. examples include weight, vlounme, color, ect

Chemical properties

•describe the behavior of a substance when it reacts or combines with another substance. Examples include burning & rusting.

Physical Properties

•Temperature •Weight & mass •Density •Refractive index

Lab temp

Kelvin

US temp

Fahrenheit

Rest of world temp

Celsuis

Mass

•is a constant property of matter that reflects the amount of material present

Weight

is a property of matter that depends both on the mass of a substance and the effects of gravity on that mass

Measuerment of mass

known mass versus unknown mass

intensive property

•which means that it is not dependent on the size of an object

crystalline solid

is one in which the constituent atoms have a regular arrangement. Table salt is an example of a crystalline solid.

•amorphous solid

is one in which the constituent atoms or molecules are arranged in random or disordered positions. There is no regular order to amorphous solids. Glass is an example of an amorphous solid.

Borosilicate glass

•which is highly heat resistant, is made by substituting in whole or part boron oxide for the silica, sodium, & calcium oxides.

Tempered glass

•is made stronger than typical glass by introducing stress through the rapid heating & cooling of the glass surfaces

Laminated glass

•is made by bonding two ordinary sheets of glass together with a plastic film. It is used in applications, such as windshields, where it is especially beneficial for glass fragments to remain intact.

flotation method

The density of a glass particle can thus be determined quite accurately by placing it in a liquid mixture & varying the density of the liquid until the glass particle remains suspended in the liquid

Becke line

•is a bright halo that is observed near the border of a particle immersed in a liquid of a different refractive index.

immersion

Immersing a piece of glass in a liquid with a sufficiently high boiling point

Radial fractures

•are cracks in glass that extend outwards like the spokes of a wheel from the point at which the glass was struck.

Concentric fractures

•are cracks in glass that form a rough circle around the point of impact.

Virtual image

•an image that cannot be seen directly. It can only be seen by a viewer looking through a lens

Real Image

•an image formed by the actual convergence of light rays upon a screen

Transmitted illumination

•Light that passes up from the condenser & through the specimen. Used for transparent specimen

Vertical or Reflected illumination

•illumination of a specimen from above; in microscopy it is used to examine opaque specimens

Condenser

•lens system located under the microscope stage that focuses light onto the specimen

Parfocal

•construction of a microscope such that when an image is focused with one objective in position, the other objective can be rotated into place & the field will remain in focus

Monocular

Microscope w/ 1 eye peice

Binocular

2 eyepices

Field of View

• the area of the specimen that can be seen after it is magnified

Depth of Focus

•the thickness of a specimen entirely in focus under a microscope. Increases with increasing magnification

Comparison Microscope

side by sie comparison of specimen

Stereoscopic Microscope

Image is 3D

Image is right-side-up

Most widely used for forensics

Large working distance between the objective lens & the specimen allows examination of large, bulky items

Microspectrophotometer

Different molecules behave diff when exposed to electromagnetic radiation.

Scanning Electron Microscope (SEM)

Looks at electrons coming off of the sample instead of looking at light (as in previously discussed forms of microscopy)

Magnification from 10x to 100,000x

Allows for elemental analysis (heavy atoms only) through the production of X-rays

For looking at shapes/morphology of specimen

Qualitative

analysis gives the identity of the chemicals in the sample.

Quantitative

•analysis is the determination of the amount and/or concentration of each component of a sample.

Stationary phase

•the part of the chromatographic system that remains fixed; either a solid or a more complex case of a liquid adsorbed to a solid

Mobile phase

•the part of the chromatographic system that moves from the site of injection to the site of the detector; is a gas in GC and a liquid in TLC, LC, & HPLC

Lower limit of quantitation (LOQ)

•is the smallest amount of analyte that can be measured with reasonable accuracy (10 x the noise)

Detection limit (LOD)

•is the smallest quantity of analyte that is “significantly different” from the blank (3 x the noise)

follicle

holds the root

cortex

central core that forms the bulk of the strand

medulla

•cellular column running through the center of the hair

Root

where the hair grows from

cuticle

•covers the cortex

Cortex

Gives hair it's color

proximal

near the root

Distal

End of the tip of hair

Cortical fusi

are irregular-shaped airspaces of varying sizes

Pigment granules

are small, dark, & solid structures that are granular in appearance & considerably smaller than cortical fusi

Ovoid bodies

•are large, solid structures that are spherical to oval in shape, with very regular margins

Humans

•Pigment granules are typically found near the cuticle, except in red hair •Color & pigmentation is typically consistent throughout the length of the hair •Medulla, when present, is amorphous with a width generally less than 1/3 the overall diameter of the shaft

Animals:

•Pigment granules are typically found toward the medulla •Radical color changes may occur in short distances (called banding) •Medulla is normally continuous & structured & generally occupies an area greater than 1/3 the diameter of the shaft

melanin

which is the dark brown pigment of both skin and hair

phaeomelanin

•which is a red-brown or yellow-brown pigment which is chemically similar to melanin

follicular tag

which is a translucent piece of tissue surrounding the hair’s shaft near the root

Anagen phase

is the inital growth phase during which the hair follicle is actively producing hair

Catagen Phase

Is a transition stage between the anagen and telogen phases of hair growth

Telogen phase

finally stage hair naturally falls out

monomers

smaller molecules made by man

Polymer

is a molecule of very high weight fromed by chemical linking

Electrocoat Primer

•the 1st layer on a steel body, which is electroplated onto the body to provide corrosion resistance. Is black to gray & is an epoxy based resin.

Primer Surfacer

•the 2nd layer, which serves to smooth out & hide any seams or imperfections. Varies in color. Is an epoxy-modified polyester.

Basecoat

is the colorcoat. Uses an acrylic-based polymer as a binder. May include aluminum flakes for a metallic finish

Clearcoat

•is an unpigmented coat that improves gloss, durability, & appearance. Are typically acrylic or polyurethane based.

About this deck

By: Chad Love
Created: 2010-10-03
Size: 77 flashcards
Views: 20

About StudyBlue

“I have used this website for three exams, and I see a huge difference in my test results.”
Naj