Water Solubie Chlorides And Sulfates In Aluminum Lakes
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Italy
Known as an Italian recipe, with similar versions prepared across other nations.
Ingredients 1 ingredient
- 50 ml water
Cook safely
Keep children and pets away from the hob and the oven, and keep oven gloves and a lid within reach.
- Boiling water and steam. Turn pan handles inward, away from the edge of the hob. Lift lids away from you, and pour hot water away from your body: steam burns too.
Method
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- Weigh accurately 10 g of the sanple.
- Add 250 ml of water.
- Stir to wet out the sanple and then stir occasionally during a period of 30 min.
- Filter.
- Measure 50 ml of the filtrate, add 50 ml water and acidify with 5 ml of 1.5 M nitric acid solution.
- Determine the chloride content by the potentianetric method used for soluble colours.
- Measure 50 ml of the filtrate, dilute to 300 ml with water and acidify with hydrochloric acid, adding 1 ml in excess.
- Heat the solution to boiling and add an excess of 0.25 N barium chloride solution, drop by drop, with stirring.
- Ocnplete the analysis by digesting, filtering, and igniting the precipitate as described in the method used for the determination of sulfate in soluble colours.
- Sane colours have solubilities of less than 5 g/200 ml and the use of a lower weight is prescribed in the Monograph under "Tests".
- V.
- METHODS FOR ENZYME PREPARATIONS
Plating
Cookware for this recipe
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Saucepan
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Wooden spoon