Nitric Acid fumes

1 post / 0 new
water
water's picture
Nitric Acid fumes

I am a technician in a lab for trace analysis. I clean all labware  with 20% HNO3 and the area is not well ventilated. I have two questions 1) what type of mask I should use? Is enough the mask for  protecting from solvent? if yes can anyone knows the specifications? 2) how I can check the level of fume in the air?