In a concentration of 1 per cent the ammonium salts of weak acids react positively with ninhydrin. by on March 14, 2009 www.jbc.orgDownloaded from. V. J. Harding and F. H. S. Warneford 335 3. In very high concentration the ammonium salts of the strong mineral acids give a positive ninhydrin reaction.
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The average cost of 6â gutters ranges between $1,000-$1500 for the same, 2,000 square foot home. Average cost of gutters per foot for 5â gutters is between 5-8 dollars and for 6â gutters between 8-10 dollars. 5â seamless: $800-$1200.â seamless: $1,000-$1500. 6â cost per foot: 8-10 dollars. There are several reasons that account for the variation in the price of seamless gutters. For instance, some people have an angled fascia or no fascia so the gutter has to be strapped to the fascia, which can add cost.