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“Boiling potatoes can reduce their nutritive value by causing the loss of minerals, including potassium, in which potatoes are rich, [causing them to] leach into the cooking water,” Akhavan noted.
The average potato has 0.075 mg solanine/g potato, which is equal to about 0.18 mg/kg based on average daily potato consumption. [ 19 ] Calculations have shown that 2 to 5 mg/kg of body weight is the likely toxic dose of glycoalkaloids like solanine in humans, with 3 to 6 mg/kg constituting the fatal dose. [ 20 ]
Deep frying potatoes at 170°C (338°F) is known to effectively lower glycoalkaloid levels (because they move into the frying fat), as does boiling (because solanine is water soluble), while microwaving is only somewhat effective, and freeze drying or dehydration has little effect.[10] [11] This does not make sense to me.
Place potatoes in the water, and let them soak for 15 minutes to allow dirt and grime to loosen. Using a vegetable brush, thoroughly scrub the potatoes to remove dirt from the skins.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
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This is the "fur" that builds up on kettle elements, etc., in hard water areas. With the exception of calcium, boiling does not remove solutes of higher boiling point than water and in fact increases their concentration (due to some water being lost as vapour). Boiling does not leave a residual disinfectant in the water.
Take potato slices, stew them with butter, chopped marjoram and parsley; simultaneously whisk four or five egg yolks with a little wine, pour them into the boiling potatoes, remove from heat and serve. (French: Autrement. Prennez la tartoufle par tranches, & mettez eſteuuer auec beurre, mariolaine haſchee, du persin : puis prennez quatre ou ...