Clinical Chemistry and Laboratory Equipment

44問 • 1年前

問題一覧

it is glass or plastic tubes, usually open at both ends, which are used to transfer specific amounts of liquid from one container to another. They are usually used for volumes between 1 and 100 milliliters.

Pipets

Based on design: To contain (TC) :

Sahli-hemoglobin and Lang Levy

Based on design To deliver (TD):

Mohr, Serologic, Volumetric

Based on drainage Blow out:

Serologic and Oswald-Folin

Based on drainage Self-draining:

Mohr and Volumetric

Contains a particular volume but does not dispense the exact volume.

TC - To Contain Pipet

Can dispense the amount of volume indicated and Designed to be drain by gravity

TD - To Deliver Pipet

Has a continuous etched ring or two small continuous rings located near the top of the pipet.

Blow out

Allows the content to drain by gravity

Self-Draining

The frosted band should not be confused with thicker colored rings or colored dots, which are a manufacturer’s code for the maximum volume of the pipette.

Blow out

only blow out a serological pipette if it has a _____________

frosted band or two thin rings

Deliver the amount of liquid contained between two calibration marks not calibrated with sufficient tolerance to use in measuring standard or control solutions.

Measuring or Graduated

Identify which measuring pipets the ff: (mohr or serologic) They are calibrated between two marks on the stem

Mohr Pipettes

Identify which measuring pipettes ff: (Mohr or Serologic) The volume of the space between last calibration mark and the delivery is not known

Mohr Pipettes

Identify which measuring pipettes ff: (Mohr or Serologic) The graduation on these always end before the tip.

Mohr Pipettes

Identify which measuring pipettes ff: (Mohr and Serological) Generally, a blowout pipet and they are long tubes with uniform diameters

Serological Pipettes

Identify which measuring pipettes ff: (Mohr or Serological) Graduated or they have graduation marks to the delivery tip of the pipet

Serological pipettes

Identify which measuring pipettes ff: (Mohr or serological) Has larger orifice or mouth than mohr pipet

Serological Pipettes

Identify which measuring pipettes ff: (Mohr or Serological) The distance from last calibration mark up to the tip is known.

Serological Pipettes

Identify which measuring pipettes ff: (Mohr or Serological) The graduation marks continue to the tip.

Serological

Which transfering pipet with no Graduation mark used for viscous fluids and has bulb near the tip.

Oswald-Folin Pipet

Which Transnfer pipet has used to deliver a single specific volume of liquid, usually between 1-100ml and bulb located at middle of the pipet.

Volumetric pipet

Which Transfer pipet, do not have calibration mark and it is used to transfer solution without consideration of a specific volume.

Pasteur Pipet

It is type of Automatic Pipet that relies on piston for suction creation to draw the sample into a disposable tip that must be changed for use

Air Displacement

This is type of automatic Pipet operates by moving the piston in the pipet tip and doesn’t require different tips

Positive Displacement

Obtain the liquid from common reservoir and dispense it repeatedly

Dispenser and Dilutor/Dispenser

use to draw liquid up into the pipette.

Pipet Bulb/s

Curvature in the top surface of the liquid. Pipette should be held that the calibration mark is at the eye level.

Meniscus

Lower Meniscus:

Clear Solution

Upper Meniscus:

Colored or Viscous Solution

It is usually use in the laboratory, because they are safe, stable and more precise

Automatic Pipet

Fix volume automatic pipet meaning:

Only one volume pipet

Variable volume automatic pipet meaning:

able to select different volumes

Macropipette dispenses:

more than 1ml

micropipette which dispense:

less than 1ml

Glassware or other apparatus used in quantitative measurement is checked to determine its exact volume.

Calibration

Calibrated by weight using distilled water and analytical balance

National Bureau of Standards

What is the purpose of calibration in laboratory vessels?

To determine the exact volume of the vessel

Which standard is used to calibrate laboratory vessels?

National Bureau of Standards

What is the primary use of volumetric flasks?

To hold one exact volume of liquid

What is a key feature of Erlenmeyer flasks?

Designed to hold different volumes of liquid

Which type of beakers are mentioned in the image

Berzelius and Griffin

What is the function of a graduated cylinder?

To measure liquid when high accuracy is not essential

How are graduated cylinders calibrated?

To deliver

PARA LEC PART 2

ユーザ名非公開 · 46問 · 1年前

PARA LEC PART 2