Demonstrate how Blood Grouping works

The following demonstration has been reproduced by kind permission by Lynda Birchwood in Kingston

A cheap and simple way to show and demonstrate how blood grouping works. Not able to show the Rhesus factor though.
 

All made with distilled water and red dye

	Donor Group	Recipient group
O	Nothing else added	Barium Chloride + Sodium Hydroxide
A	Iron(3) Chloride	Barium Chloride
B	Potassium Sulphate	Sodium Hydroxide
AB	Iron(3) Chloride + Potassium Sulphate	Nothing else added

Bench solutions and spatulas of dry chemicals are fine for this, enough though to show displacement. So when on a spotting tile you can see the "red cells" clump together!! The table below shows the result you should get.

 

	O	A	B	AB
O	+	+	+	+
A	-	+	-	+
B	-	-	+	+
AB	-	-	-	+

 

See also;

• Forensics

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