Simple measuring method for trace arsenic in atmosphere

The invention relates to a simple measuring method for trace arsenic in atmosphere. The method comprises the following steps: (1) atmospheric sampling: a Na2CO3-glycerin impregnated filter membrane isadopted for collection at the flow of 100 L/min for 10-15 h; (2) digestion: the filter membrane is taken down and placed into an arsenic determining device, HNO3-H2SO4 mixed acid is added, the mixture is heated to 50-60 DEG C for 20 min, and cooling is performed after heating; (3) reducing color development: potassium borohydride is sliced and placed into the arsenic determining device, and aftera mercury bromide test strip is rapidly loaded, the arsenic determining device is horizontally shaken until the slices are completely dissolved and left to stand for 15 min; (4) color comparison. According to the provided measuring method, sample digestion, reduction and measurement are integrated after enrichment, so that original complicated operation links such as digestion, evaporation, acidremoval, evaporation to dry