Quality control methods for

Method of measurement 
Since radionuclides from accidental discharges vary with the type of facility 
involved, a generalized method of measurement is so far not available. 
However, should such contamination be of concern, suspect samples can be 
analysed by a competent laboratory. Details of laboratory techniques are 
available from the International Atomic Energy Agency (IAEA).
3
 
3
International Atomic Energy Agency (IAEA), Analytical Quality Control Services, Laboratory 
Seibersdorf, PO Box 100, Vienna, Austria. 

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Quality control methods for medicinal plant materials 
20. Culture media and strains of microorganisms 
Culture media 
The following media are satisfactory, but other media may be used if they have 
similar nutritive and selective properties for the microorganisms to be tested. 
Baird-Parker agar 
Procedure. Dissolve 10.0 g of pancreatic digest of casein R, 5.0 g of beef extract R, 
1.0g of water-soluble yeast extract R, 5.0 g of lithium chloride R, 20.0 g of agar R, 
12.0 g of glycine R and 10.0 g of sodium pyruvate R in sufficient water to 
produce 950 ml. Heat to boiling for 1 minute, shaking frequently and adjust the 
pH to 6.6-7.0 using sodium hydroxide (0.5 mol/l) VS. Sterilize in an autoclave at 
121°C for 15 minutes, cool to 45-50°C and add 10 ml of a sterile 0.01 g/ml 
solution of potassium tellurite R and 50 ml of egg-yolk emulsion. 
Brilliant green agar 
Procedure. Dissolve 10.0 g of dried peptone R (meat and casein), 3.0 g of water-
soluble yeast extract R, 5.0 g of sodium chloride R, 10.0 g of lactose R, 10.0 g of 
sucrose R, 20.0 g of agar R, 0.08 g of phenol red R and 12.5 mg of brilliant green 
R in sufficient water to produce 1000 ml. Heat to boiling for 1 minute. Using 
sodium hydroxide (0.05 mol/l) VS adjust the pH to 6.7-7.1. Immediately before 
use, sterilize in an autoclave at 121°C for 15 minutes, cool to 50°C and pour into 
Petri dishes.