The test solution is placed in a test tube, and a small amount of alpha-naphthol added; concentrated sulfuric acid is th在试管中放入待检测的溶液，加入少量的萘酚，接着把浓硫酸沿着试管壁缓缓滴入试管。
The effect of concentrated sulfuric acid on germination of wild soybean in Yellow River Delta Area浓硫酸处理对黄河三角洲野大豆发芽效果的影响