The invention discloses a method for determining escape
ammonia in
flue gas of a
cement plant. The method comprises the following steps: introducing
flue gas of the
cement plant into absorption liquid, and performing constant volume treatment with water, thus obtaining to-be-determined solution; preparing
standard curve solution; respectively placing the to-be-determined solution and the standardcurve solution into different colorimetric tubes provided with a plug, performing constant volume treatment with water, then sequentially and respectively adding
salicylic acid-
trisodium citrate solution,
sodium nitroprusside solution and
sodium hypochlorite solution into the colorimetric tubes provided with the plug and uniformly mixing, then stabilizing the colorimetric tubes provided with the plug for 2-4 hours at the temperature of 30-40 DEG C, and then performing colorimetric determination according to coloring depth, thus obtaining concentration of
ammonia in the
flue gas of the
cement plant. The method disclosed by the invention determines
ammonia concentration by utilizing an
indophenol blue spectrophotometric method, the help of large-scale analytical instruments and equipment isnot required as the detection
analysis method is adopted, and the method is simple, quick and accurate, saves cost, has obvious practicability and is applicable to field laboratory analysis; and detection results are stable,
repeatability is good, detection
accuracy and precision are improved, and a measurable concentration range of a sample is broadened.