Laboratory Wares Flashcards
1
Q
Characteristics of Glassware’s
A
- Breakable
- Reusable
- Ideal for Acidic Solution
- High Thermal & Corrosion Resistance
- Good Optical Properties
- Low cost
2
Q
Characteristic of Plastic Wares
A
- Disposable
- High Shock Proof
- Ideal for Alkaline Solutions
- Relatively inert
- Flexible
- For cryogenic experiments
3
Q
- Borosilicate glass with low alkali content.
- Resist heat, corrosion and thermal shock
- Ex: Pyrex, Kimax, Exax.
A
High Therma Resistant Glass
4
Q
- 6X stronger than borosilicate glass
- Alumina Silicate
- Can resist clouding due to alkali
- ideal for high temperature thermometers, graduated cylinders and centrifuge tubes
A
Corex
5
Q
- For use in application involving high temperature and drastic heat shock and extreme chemical treatment with acids and dilute alkali.
- Can be heated to 900 Degree Celsius with down shock too ice water.
- ideal for ashing and ignition techniques.
A
Vycor
6
Q
- 96% silica content comparable to fused quartz it is thermal endurance, chemical stability, and electrical characteristic.
- Radiation resistant, good optical qualities and temperature capabilities.
- Ideal for high precision analytical work and can also be used for optical reflectors and mirrors.
A
High Silica Glass
7
Q
- Boron-free glassware for strong alkali solutions and digestion with strong alkalies.
- Less thermal resistant than borosilicate glass.
- Known as soft glass.
A
Glass with strong high resistance to alkalis.
8
Q
- Amber or red colored to reduce the amount of light passing through the substance within the glassware.
- Highly protective laboratory glassware for handling heat-labile substances in the 300-500nm range
-Bilirubin, carotene, and vitamin A
A
Low Actinic Glass
9
Q
- Soda-lime glass which is composed of a mixture of oxides of Si, Ca, and Na.
- Low cost and readily fabricated.
- poorly resistant to high temperature and sudden changes in temperature
- easily melted thus used as reagent bottle and disposable laboratory glassware.
- releases alkali into pipetted liquid.
A
Standard Flint Glass
10
Q
- Unique group of resins with relatively inert chemical properties.
- Unaffected by acids, alkali, salt solutions and aqueous solutions.
- Ex. polyethylene, polypropylenes.
A
Polyolefins
11
Q
- Twice as strong as polypropylene
- chemical resistance is not same as the polyolefins.
- unsuitable for bases as amines, ammonia, and alkalis
- glass clear and shatterproof
- ideal for centrifuge tubes or graduated cylinders.
A
Polycarbonate resin
12
Q
- Nontoxic , clear plastic of modified PVC (PolyVinylChloride)
- used extensively for the manufacture of ACA (Automated Clinical Analyzers) tubings.
- Can be steamed-autoclaved or chemically sterilized
- Tubings id soft and flexible and quickly slips over tubulatures but gripping tightly on glass or metals.
A
Tygons
13
Q
- Almost chemically inert with high corrosion resistance at extreme temperatures.
- used for cryogenic experiments.
- work at high temperature over extended periods
- easy to clean and fast drying but it can be scratched and misshaped.
A
Teflon fluorocarbon resins.
14
Q
- design is to deliver a fixed volume of liquid.
- has cylindrical bulb joined at both ends to narrower glass tubing’s.
- Calibration mark is etched around the upper suction tube.
- accurate measurement of aliquots of nonviscous samples.
A
volumetric Transfer Pipet
15
Q
- bulb closer to the delivery tip
- used for measuring viscous fluids as blood or serum
- ## etched ring near the mouthpiece (BlowOutPipet)
A
Ostwald-folin pipet
