The invention provides a method for measuring the content of acid mist in
sulfuric acid production
tail gas. The measurement method comprises the steps of sampling, preparing a sample, measuring, drawing a
standard curve and calculating a result. By means of sampling at a
constant speed, acid mist in
sulfuric acid production
tail gas is absorbed by using a dilute alkali solution,
sulfate ions in a sample solution react with
barium chloride under a neutral condition to generate white precipitate of
barium sulfate and form turbid liquid, and a
hydrochloric acid solution is added into the sample solution, so that the influence of
barium sulfite white precipitate generated by
sulfur dioxide and
barium chloride in the
tail gas on the result can be effectively eliminated, and then the
absorbance is determined. The
sulfate ion concentration and the
absorbance have a good
linear relationship within a certain range, and the content of
sulfate radicals in a sample is determined by setting a
standard curve and comparing the measured
absorbance of a sample solution with the
standard curve. The measurement method is simple and convenient, low in cost and high in accuracy, used equipment is simple and easy to obtain, and application of small and medium-sized chemical enterprises is facilitated.