Test For Paraquat: Take Amount Of Grass Used In One Joint, And Wash In 5 Cc's Of Water, Agitating Gently For 15 Minutes.

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Test for paraquat:
Take amount of grass used in one joint, and wash in 5 cc's
of water, agitating gently for 15 minutes. Strain out leaves,
leaving a brownish-yellow solution. Add 100 mg each of sodium
bicarbonate and sodium dithionite. If paraquat is present,
the solution will turn blue-green.

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