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Dissolved organic nitrogen extraction

The standard procedure for the synthesis of leuco dyes related to benzoyl leuco Methylene Blue is straightforward. The one-pot synthesis is carried out in a two-phase water-toluene system. Methylene Blue is first dissolved in the aqueous phase and reduced with sodium dithionite under nitrogen and with stirring. The yellowish leuco is extracted into the organic phase where it is allowed to react with an acid chloride, the aqueous phase being made alkaline. [Pg.74]

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Dissolved nitrogen

Dissolved organic

Dissolved organic nitrogen solid phase extraction

Extract organics

Extractable organics

Nitrogen dissolved organic

Nitrogenous Extractives

Organic extractables

Organic extractants

Organic extraction