浓度 0.5ppm~5ppm含10%100ppm~1% 100ppm~2% 10ppm~100ppm含12ppm1ppm~2000ppm含1ppm~2ppm含1ppm~30ppm含1ppm~5ppm含2000ppm~30%2000ppm~60%lel (2.4%) 2000ppm~60%lel (3%) 3000ppm~5%含30ppm~100ppm含30ppm~2999ppm含30ppm~5%含30ppm~60%lel (1.32%) 含30ppm~100ppm含 30ppm~60%lel (1.08%) 含30~5000ppm含3ppm~2000ppm含3~30ppm含5ppm~30ppm含60ppm~80ppm6ppm~10ppm含6ppm~30ppm含800ppb