Table 3.

Quantitative composition of industrial aerosol particles in the electroplating workshop.

No	Sampling point	Q-ty of PM0.3	Q-ty of PM0.5	Q-ty of PM1	Q-ty of PM3	Q-ty of PM5	Q-ty of PM10
0	Background-office	4,310,371	791,546	62,586	5,296	2,004	268
1	Aluminum cleaning	519,674,500	84,421,240	7,266,013	1,135,918	490,619	61,614
2	Aluminum etching	506,923,000	77,166,580	6,328,771	920,321	375,156	46,185
3	Sulfuric acid anodizing	506,473,800	84,629,070	7,742,597	1,300,552	566,366	79,331
4	Aluminum degreasing	774,991,600	162,161,400	9,128,154	969,094	398,746	47,678
5	Chemical degreasing	448,472,500	134,870,800	30,231,220	12,399,540	7,378,788	1,195,740
6	Cathodic degreasing 3	643,172,200	130,576,300	7,848,006	985,816	415,468	59,026
7	Cathodic degreasing 4	708,764,000	143,945,600	8,276,812	992,087	410,790	54,745
8	Cold rinse	538,953,100	92,534,710	6,765,838	901,209	370,179	44,991
9	Desmutting	554,218,000	82,453,290	6,413,975	836,908	335,341	43,199
10	Nonferrous metals etching	295,190,000	45,127,460	4,913,552	662,420	268,551	31,056
11	Chromium plating	546,641,900	99,608,620	9,115,911	916,737	332,952	31,852
12	Nickel plating	844,536,600a	277,202,500	19,315,880	614,841	178,968	10,949
13	Chemical nickel plating	170,112,500	19,012,500	3,270,000	673,929	309,286	41,786
14	Cadmium plating	328,474,600	45,382,330	3,261,131	365,724	157,951	25,442
15	Silvering	536,869,600	87,845,940	5,920,848	298,233	117,315	17,668

^aBold shows highest results.