The concentration ofL-serine and formaldehyde were determined by chromatic acid colorimetry. 采用铬变酸比色法测定甲醛和丝氨酸浓度。
Humic acid had significant photosensitization on tetramethrin,and itsphotosensitization increased rapidly as the humic acid concentration increased. 腐殖酸对胺菊酯光敏化作用显著，并随腐殖酸浓度的增加而迅速增强。
