78:, who used a variant of them extensively during his research. In the past, there was no equipment to transfer a chemical solution without exposing it to the external environment. The hygiene and purity of chemical compounds is necessary for the expected result of each experiment. The eye dropper, both glass and plastic types, can be sterilized and plugged with a rubber bulb at the open end of the pipette preventing any contamination from the atmosphere. Generally, they are considered cheap enough to be disposable, however, so long as the glass point is not chipped, the eye dropper may be washed and reused indefinitely.
87:
using a dropper, the tip should be carefully examined for cracks. To increase accuracy, the pipette is to be rinsed with the reagent. To use the dropper, the bulb is squeezed to expel air out of the pipette and the tip of the pipette is submerged into the solution vertically. The bulb is slowly released to draw the solution up, making sure that the solution does not overshoot into the bulb or else it may get contaminated. To dispense the reagent, the tip is held against the side of the target container at a 30 to 45 degrees angle.
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174:. Borosilicate glass is a widely used glass for laboratory apparatus, as it can withstand chemicals and temperatures used in most laboratories. Borosilicate glass is also more economical since the glass can be fabricated easily compared to other types. Soda lime glass, although not as chemically resistant as borosilicate glass, are suitable as a material for inexpensive apparatus such as the Pasteur pipette.
124:
197:. The bulb portion is thinner and therefore "squeezable", while the pipette portion is thick enough to be rigid. They commonly come in 1, 2, 3, and 5 ml which comes with a specific drop size of 10, 20, 25, 35, and 50 ÎĽL. The volumes are usually marked on the stem, though the markings are rather crude and are not particularly accurate.
300:
required high efficiency and precision for drug test and observation of diseases. Pasteur pipettes are commonly used in the medical lab because of its essential accuracy. The design of the
Pasteur pipette allows for high effective performance in the medical lab. It produces a constant volume of drop.
280:
one-half to two-thirds of the way up the inside of the tube. After squeezing the bulb to expel air, a pasteur pipette is inserted into the tube just below the level of the ring of refluxing liquid (into the vapor). The vapor is then drawn into the relatively cold pipette tip, causing it to condense
86:
In laboratory use, droppers should not be used for work involving high accuracy since droppers are not designed to measure specific volume; however, it can be used to add drops of reagents. Each type of dropper is designed to produce a specific drop volume, but this is not highly precise. Before
200:
A plastic dropper is relatively inexpensive and disposable, so they are often used to avoid cross-contamination. In a solution containing cells and/or protein, it reduces the loss of cell and/or protein that binds to glass. Some plastic pipettes include a long flexible tube that can be bent for
248:
The constriction toward the tip of the
Pasteur pipettes may be plugged with a bit of tissue paper or cotton wool to filter off solids from small amounts of liquids. The bulb can be attached and squeezed to help viscous solutions filter more rapidly.
482:
54:, is a device used to transfer small quantities of liquids. They are used in the laboratory and also to dispense small amounts of liquid medicines. A very common use was to dispense
70:
at the top, although many styles of both plastic and glass droppers exist. The combination of the pipette and rubber bulb has also been referred to as a teat pipette. The
716:
220:
cannot be used in plastic
Pasteur pipettes as the solvent can dissolve the plastic.) The pipettes are also hard to wash and are usually discarded with other
675:
227:
Plastic bulb pipettes are generally not precise enough to be used for exact measurements, whereas their glass counterparts can be extremely precise.
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2004:
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Heat can be applied to the tip of a plastic
Pasteur pipette to seal the solution and create a liquid-tight storage.
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2112:
1948:
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276:. The liquid to be distilled is placed into a small reaction tube along with a boiling chip and heated to
102:
This liquid handling tool, known as the "Pasteur
Pipette," was first discovered by the renowned scientist
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459:"Laboratory Glassware Disposal | Laboratory Waste Management | Environmental | Safety Programs | EHRS"
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The two types of glass that are usually found in the laboratory and in the
Pasteur pipette are
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This article is about the laboratory tool. For the digital tool in graphics software, see
8:
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193:, have their stems and bulbs in the form of a single piece made of soft plastic such as
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910:
875:
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822:
561:"How to Choose Pasteur Pipettes, Pasteur Liquid Transfer Pipette, Eye Droppers"
107:
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2014:
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where most media are aqueous and solvent resistance is not important. (Most
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410:"Pasteur Pipettes (transfer pipettes) – A History of glass to plastic"
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With a bit of skill, Pasteur pipettes may also be used for microscale
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after pulling it over a flame, though it may take some practice.
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24:
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in the 19th century. He is widely recognized for developing the
90:
Broken pasteur pipettes should be disposed of in an appropriate
1382:
277:
244:
Column chromatography constructed using plastic
Pasteur pipette
213:
1999:
1978:
537:"Pasteur Pipette - Pasteur Pipettes Manufacturer from Mumbai"
301:
This reduces the concern of liquid remaining in the pipette.
123:
1553:
852:
177:
Glass pasteur pipettes can be used to make spotters for
673:
Procedure for
Microscale Flash Column Chromatography
235:
16:
Device used to transfer small quantities of liquids
272:Pasteur pipettes can also be used for microscale
2104:
641:"Helpful Hints on the Use of a Volumetric Pipet"
58:into the eye. The commonly recognized form is a
189:Plastic Pasteur pipettes, also referred to as
769:
284:
110:, and the pipettes were named in his honor.
1729:Nuclear magnetic resonance (NMR) instrument
204:Plastic Pasteur pipettes are often used in
776:
762:
267:
260:, the bulb may be squeezed for microscale
201:drawing solution from small volume tubes.
184:
741:"DISPOSABLE PIPETTES | BENEFITS AND USES"
693:"Microscale Techniques - Complete Manual"
610:Essentials of Clinical Laboratory Science
2094:Instruments used in medical laboratories
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783:
717:"Transfer pipette, polyethylene Z354368"
239:
122:
118:
33:
1610:Inductively coupled plasma (ICP) device
292:
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1658:Transmission electron microscope (TEM)
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281:and accumulate inside of the pipette.
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23:. For the pipette more broadly, see
13:
1653:Scanning electron microscope (SEM)
596:
74:name is from the French scientist
14:
2124:
669:University of Colorado at Boulder
638:
1698:Thermogravimetric analyzer (TGA)
1508:Nuclear magnetic resonance (NMR)
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323:
311:
236:Microscale column chromatography
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586:"Plastic Serological Pipettes"
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1:
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614:. Cengage Learning. pp.
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62:tapered to a narrow point (a
7:
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359:
262:flash column chromatography
81:
10:
2129:
1936:
483:"Pasteur Pipette Archives"
256:. With appropriately fine
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1902:
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1853:Time-domain reflectometer
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1620:Liquid chromatograph (LC)
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697:www.chemistry.mcmaster.ca
285:Microscale liquid storage
179:thin layer chromatography
113:
38:Plastic Pasteur pipettes
29:Dropper (disambiguation)
1688:Melting-point apparatus
1069:Cryogenic storage dewar
389:www.merriam-webster.com
385:"Definition of DROPPER"
318:Plastic Pasteur pipette
268:Microscale distillation
185:Plastic Pasteur pipette
1625:Mass spectrometer (MS)
1615:Gas chromatograph (GC)
682:. Accessed 1 Nov 2006.
541:www.ajoshabioteknik.in
434:"Proper Pipette Usage"
245:
128:
127:Glass Pasteur pipettes
108:pasteurization process
39:
27:. For other uses, see
2000:Acid-resistant gloves
1681:differential scanning
606:Ridley, John (2010).
565:Green BioResearch LLC
507:"Physical Properties"
438:Bioscience Technology
254:column chromatography
243:
224:waste after one use.
126:
119:Glass Pasteur pipette
37:
2113:Laboratory glassware
1577:Analytical chemistry
1079:Laminar flow cabinet
785:Laboratory equipment
298:Medical laboratories
293:Medical laboratories
66:) and fitted with a
1949:Personal protective
858:Meker–Fisher burner
92:glassware container
1792:Function generator
1775:Bench power supply
1714:Analytical balance
1475:Ostwald viscometer
1470:Graduated cylinder
1209:Inoculation needle
678:2013-05-24 at the
590:Argos Technologies
517:on 5 December 2017
463:www.ehrs.upenn.edu
342:Pipette glass tube
246:
168:borosilicate glass
146:. You can help by
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40:
2100:
2099:
2087:
2086:
2083:
2082:
2060:Fire extinguisher
2050:Biosafety cabinet
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1858:Transistor tester
1848:Spectrum analyzer
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1438:Measuring devices
1260:Soxhlet extractor
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1174:Spectrophotometer
1169:Pipeclay triangle
921:Mortar and pestle
354:Pipette container
305:Additional images
191:transfer pipettes
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1024:Test tube holder
916:Magnetic stirrer
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647:. Archived from
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513:. Archived from
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2005:Eyewash station
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1802:Pulse generator
1768:Control devices
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998:Extension clamp
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144:needs expansion
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72:Pasteur pipette
48:Pasteur pipette
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2030:Safety goggles
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2025:Safety glasses
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2020:Nitrile gloves
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2015:Medical gloves
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1984:Safety shower
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1588:Compositional
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1130:Balance brush
1129:
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1106:Weighing dish
1105:
1103:Weighing boat
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994:Burette clamp
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828:Bunsen burner
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747:. 6 May 2014.
746:
745:m2scientifics
742:
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722:
721:Sigma-Aldrich
718:
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681:
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665:
651:on 2013-06-30
650:
646:
645:www.csudh.edu
642:
635:
627:
625:9781435448148
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511:www1.udel.edu
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142:This section
140:
137:
133:
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125:
111:
109:
105:
104:Louis Pasteur
95:
93:
88:
79:
77:
76:Louis Pasteur
73:
69:
65:
61:
57:
53:
49:
45:
36:
30:
26:
22:
2055:Fire blanket
1993:Eye and hand
1979:Rubber apron
1843:Oscilloscope
1807:Potentiostat
1734:Plate reader
1630:pH indicator
1600:CHN analyzer
1595:AutoAnalyzer
1459:
1388:Round-bottom
1281:Boston round
1144:Filter paper
1099:Refrigerator
1016:Retort stand
984:Clamp holder
980:Beaker clamp
946:Vortex mixer
941:Stirring rod
936:Static mixer
866:Teclu burner
744:
735:
724:. Retrieved
720:
711:
700:. Retrieved
696:
687:
664:
653:. Retrieved
649:the original
644:
634:
609:
589:
580:
569:. Retrieved
567:. 2017-01-02
564:
555:
544:. Retrieved
540:
531:
519:. Retrieved
515:the original
510:
501:
490:. Retrieved
486:
477:
466:. Retrieved
462:
453:
442:. Retrieved
440:. 2003-01-14
437:
428:
417:. Retrieved
413:
404:
392:. Retrieved
388:
379:
330:Pipette bulb
296:
288:
274:distillation
271:
251:
247:
231:Other usages
226:
203:
199:
195:polyethylene
190:
188:
176:
165:
152:
148:adding to it
143:
101:
89:
85:
71:
51:
47:
43:
41:
21:Color picker
2043:Other items
1969:Face shield
1816:Measurement
1797:Galvanostat
1757:Electronics
1707:Other items
1693:Thermometer
1676:Calorimeter
1605:Colorimeter
1549:Gas syringe
1532:Other items
1460:Eye dropper
1335:Watch glass
1320:Evaporating
1299:Cold finger
1114:Other items
1020:Screw clamp
1012:Pinch clamp
1001:Flask clamp
951:Wash bottle
906:Homogenizer
487:Glasscolabs
68:rubber bulb
44:eye dropper
1974:Respirator
1915:Test probe
1833:Multimeter
1645:Microscopy
1465:Eudiometer
1429:Separatory
1398:Volumetric
1363:Erlenmeyer
1291:Condensers
1255:Dean–Stark
1204:Wire brush
1164:Microscope
1159:Centrifuge
1134:Cork borer
1089:Petri dish
1064:Agar plate
1051:Containers
1034:Wire gauze
871:Water bath
833:Desiccator
726:2017-05-30
702:2017-06-13
655:2017-06-13
571:2017-05-30
546:2017-05-30
492:2024-09-04
468:2017-06-06
444:2017-06-06
419:2017-06-22
372:References
258:silica gel
212:, such as
60:glass tube
50:or simply
2065:Fume hood
2010:Glove box
1863:Voltmeter
1248:Apparatus
1237:Glassware
1126:Autoclave
1121:Aspirator
1074:Incubator
1008:Iron ring
931:Sonicator
901:Chemostat
843:Hot plate
222:biohazard
155:June 2017
56:eye drops
2107:Category
1964:Lab coat
1889:Tweezers
1879:Heat gun
1635:pH meter
1544:Bell jar
1424:Dropping
1378:Florence
1368:Fernbach
1330:Syracuse
1189:Scoopula
1139:Crucible
848:Lab oven
676:Archived
521:21 April
414:Pastette
394:21 April
360:See also
82:Overview
1903:General
1823:Ammeter
1523:Thistle
1480:Pipette
1455:Cuvette
1445:Burette
1414:BĂĽchner
1407:Funnels
1393:Schlenk
1373:Fleaker
1353:BĂĽchner
1274:Bottles
1194:Spatula
1184:Stopper
1154:Forceps
1054:Storage
971:Holders
891:Shakers
862:Striker
810:Heaters
797:General
592:. 2017.
366:Pipette
218:acetone
206:biology
98:History
64:pipette
52:dropper
25:Pipette
1937:Safety
1539:Beaker
1518:Thiele
1503:Cragie
1498:Drying
1419:Hirsch
1383:Retort
1345:Flasks
1313:Dishes
1304:Liebig
1265:Kipp's
1179:Splint
989:Tripod
967:Clamps
963:Stands
926:Shaker
888:Mixers
813:Dryers
622:
278:reflux
214:hexane
1872:Tools
1490:Tubes
1325:Petri
114:Types
1554:Vial
1513:Test
1149:File
853:Kiln
620:ISBN
523:2018
396:2018
216:and
170:and
616:199
150:.
42:An
2109::
743:.
719:.
695:.
671:,
643:.
618:.
598:^
588:.
563:.
539:.
509:.
485:.
461:.
436:.
412:.
387:.
264:.
94:.
777:e
770:t
763:v
729:.
705:.
658:.
628:.
574:.
549:.
525:.
495:.
471:.
447:.
422:.
398:.
157:)
153:(
31:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
