The oxalic acid was cauterize in the muffle at 200 ℃ until fully volatilized. The solution pH was adjusted with drop ( 1+ 1) hydrochloric acid ( the congo red test paper change color from red to blue) to about 4 to remove carbon dioxide. 在马弗炉(200℃)灼烧至草酸全部挥发,滴加(1+1)盐酸,使刚果红试纸由红变蓝色(或调节pH到4左右),除去二氧化碳。
All of the strains examined have resistance to Sodium desoxycholate, Congo red, Bengal red, Methyl orange and Thymol blue. 全部供试菌对去氧胆酸钠、刚果红、孟加拉红、甲基橙和百里香酚兰的耐受性较强;
They were positive for Congo red, Alcian blue, and periodic acid Schiff ( PAS) stains. 组织化学染色刚果红、阿森蓝及PAS均阳性。
Their adsorption performance towards selected pollutants like as Congo red, methyl blue, and phenol was evaluated too. 并研究了所有样品对污染物刚果红、甲基蓝、苯酚的吸附性能。