4.40μg/mL, matrix: zinc sulfide colloid

2.17μg/mL, matrix: zinc sulfide colloid

1.28μg/mL, matrix: zinc sulfide colloid

0.1μg/mL, matrix: zinc sulfide colloid

0.15μg/mL, matrix: zinc sulfide colloid

97%

(1 bottle of sulfur dioxide standard solution 100μg/mL, 20ml/ bottle, 1 bottle of formaldehyde absorption buffer 20Ml/ bottle, 2 bottles of roseaniline hydrochloride 0.05g/100mL, 1 bottle of sodium sulfamate 0.60g/ bottle) Substrate: water .U=1%

AR, 38-42% (Mg)