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基本例句
酸浓度
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。 |