Gilson guide to pipetting - Emidio Albertini

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3 4 5 Distribution Place the pipette tip at an angle (10 to 45°) against the inside wall of the receiving vessel. Depress the plunger smoothly to the first stop position. Wait one second. Re-aspiration If the pipette tip is to be reused for the same sample, maintain the plunger in the intermediate position for subsequent immersion for the next pipetting cycle and restart operation 2. complete purge Wait one second and purge. If the pipette tip is not to be re-used, depress the plunger to purge position over an appropriate waste container and then eject the tip. Chapter 3 29
30 Positive-displacement In positive displacement pipettes, the piston enters into direct contact with the liquid; there is no air interface. Direct contact enhances accuracy and precision for liquids which are too heavy or too viscous to be displaced by air. Direct contact allows aspiration of volatile liquids without evaporation. In addition, the absence of air permits rapid pipetting without cavitation. * See page 26. 1 Preparation Press the plunger button to the first stop. The piston moves to the appropriate position. 2 Aspiration Immerse the capillary/piston in the liquid*. Release the plunger letting it move up to the home position. The piston moves up and the ambient pressure forces the desired volume of liquid through the orifice into the capillary.
Page 1 and 2: Gilson guide to pipetting Second Ed
Page 3 and 4: Chapter 1 Selecting the best pipett
Page 5 and 6: Air- displacement pipette PIPETMAN
Page 7 and 8: 6 Selecting the best pipette for yo
Page 9 and 10: 8 1 .2 The working principle of air
Page 11 and 12: 10 How do air-displacement pipettes
Page 13 and 14: 12 Learning more All air-displaceme
Page 15 and 16: 14 Consider the volume of liquid yo
Page 17 and 18: 16 Selecting the right tip for your
Page 19 and 20: 18 2.2 Choosing the best tip for yo
Page 21 and 22: 20 Correct operation Chapter 3 To o
Page 23 and 24: 22 Fit a disposable pipette tip Pip
Page 25 and 26: 24 3 .3 Adjust the volume setting 1
Page 27 and 28: 26 Air-displacement / Forward mode
Page 29: 28 Air-displacement / Reverse mode
Page 33 and 34: 32 3 .5 Eject the used tip and stor
Page 35 and 36: 34 Preventing contamination Chapter
Page 37 and 38: 36 4.2 Decontaminating your Pipetma
Page 39 and 40: 38 Caring for your pipette Chapter
Page 41 and 42: 40 Step 2- Assess pipetting functio
Page 43 and 44: 42 Step 4- Disassembly n Disassembl
Page 45 and 46: 44 Control and calibration Chapter
Page 47 and 48: 46 6.2 How to calculate volumetric
Page 49 and 50: 48 Some remarks about balances With
Page 51 and 52: 50 GLOSSARY Accuracy* Air cushion a
Page 53 and 54: 52 APPENDIX APPENDIX I - Example of
Page 55 and 56: 54 APPENDIX APPENDIX III - Evaporat
Page 57 and 58: 56 NOTES

Gilson guide to pipetting - Emidio Albertini

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