Show Select Potatoes for Best Chips Test for Soluble Sugars IsKey Is IsKey Key ey to S Secret cret of Qualities Prepared by tho United Department of ot Agriculture Service Specialists of ot the United States Department Department De De- of ot Agriculture have devised a simple method for selecting storage potatoes which will make good chips or french fries A test for the ole that Unlocks unlocks unlocks un un- sugars In potatoes is the key locks locks the secret of their culinary Dualities qualities Dual since an excessive amount of ot these sugars produces a discoloration In french fries CrIes and chips and a sweetness sweetness sweet sweet- ness In baked or boiled potatoes that thatIs Is distasteful to some people Accumulate Sugars Potatoes stored at temperatures ranging rangIn from irom 32 de degrees rees to 45 degrees F F. F accumulate certain soluble sugars as ns as a n result of ot the breakdown of ot starch In general the lower the stora storage e temperature temperature temperature tem tem- the greater the amount of ot soluble sugars and the dar darker er the color of the chips chillS To make the test a sample from the center of the potato Is placed in a n yellow yellow yellow yel yel- low solution of ot picric acid and sodium carbonate in a small test tube and heated over the flame of ot an alcohol lamp until It boils bolls for one half minute Samples from potatoes that have ha not been stored at too low temperatures change the he color of the solution to tu an orange yellow but the excessive amount of sugars In tubers stored atlow at nt atlow low temperatures changes the color toa toa to toa a deep red or r brown Test Satisfactory This test has proved satisfactory In selecting potatoes for chip making french frying baking and under certain certain tain conditions for boiling It was designed de de- signed signell especially for chip manufacturers ers who must have potatoes with alow alow a n low content of soluble sugars The test Is so simple since It Involves only a n small portable outfit that It can be used by buyers for hotels and restaurants restaurants restaurants rants where there Is a demand for high-grade high mealy cool cooked ed potatoes free from a sweetish taste and discoloration discolor discolor- |