[Studies on the suspended particles in air. I. Determination of copper, lead, cadmium and zinc in air by low temperature radio frequency oxidation apparatus and polarography].
D000397:Air Pollution / Q000032:analysis*; D002104:Cadmium / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D007564:Japan; D007854:Lead / Q000032:analysis*; D008722:Methods; D010084:Oxidation-Reduction; D011048:Polarography; D013696:Temperature; D015032:Zinc / Q000032:analysis*
D002104:Cadmium; D007854:Lead; D003300:Copper; D015032:Zinc