The preparation of 1% Eosin Yellow solution is a simple yet crucial lab procedure that is usually involved in biology, histology and staining methods.
Eosin Yellow is a common synthetic dye that is employed in microscopy. It has particular applications in staining of biological tissues where it is frequently used together with Hematoxylin in H&E staining.
It gives the cytoplasm, the connective tissues, and the extracellular matrix a pink or red stain, and thus cell structures become easier to view under a microscope.
This guide will take you through the step-by-step guides that will be taken in order to make the Eosin Yellow stain effectively ensuring consistent results.
A 1% solution typically means:
1 gram of solute (Eosin Y) dissolved in 100 mL of solution (solvent)
This is a volume (w/v) concentration.
Note: In my case, we are going to prepare 100ml of the dye.
The following are required to make the solution:
Step1: Measure the Eosin Y
Step 2: Weigh 1 gram of the Eosin Yellow powder with a digital or analytical balance very carefully.
Step 3: Measure 80 ml of the Ethyl alcohol using the volumetric flask.
Step 4: Add the 1g measured Eosin yellow into the 80ml Ethyl alcohol and then mix gently.
Step 5: Dilute the solution to 100ml using the Ethyl alcohol with the help of a measuring cylinder or volumetric flask.
Note: Not all lab guidelines require Ethyl alcohol; some may require distilled water. There is an advantage of using alcohol (ethanol) in that it enhances solubility and preservation.
Step 6: Filter (Optional) - In case particles are not dissolved filter using the filter paper and funnel to get a clear solution.
Step 7: Transfer the solution to a storage bottle or the amber bottle.
Step 8: Label with adhesive labels and Store
Label the bottle with the following details:
Preparation of 1% Eosin Yellow solution is an easy process that must be precise and should be handled carefully. A reliable staining solution can be made using the above steps to be used in laboratories and at the educational level. Safety and proper storage should always be considered so as to make your solution effective.
We have a visual presentation on this guide, where we take you through a step-by-step procedure on how to prepare the stain. Have a look at it.
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