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器材农用尿素,37％工业用甲醛,99.5％冰乙酸,25％氢氧化钠水溶液;三角架,烧杯,酒精灯,滴管,要埋藏的生物标本等。制法将尿素21克与甲醛60毫升(若甲醛浓度不够要增加用量)混和成均匀溶液,加热至30℃加入一滴氢氧化钠溶液,使pH=6.5—7.5;继续加热至90℃,加入10滴左右冰乙酸,使pH=5—6;待反应平息再加入氢氧化钠10滴左右,使pH=6.5—7;再加入溶液量的1/20—1/15的冰乙酸,使pH=3.5—4.5,搅拌均匀便制成澄清透明的胶液。将胶液在方形或圆形的金属皿、玻璃皿或
Equipment, agricultural urea, 37% industrial formaldehyde, 99.5% glacial acetic acid, 25% aqueous sodium hydroxide; tripod, beaker, alcohol lamp, dropper, to be buried biological specimens. Preparation method 21 grams of urea and formaldehyde 60 ml (if the concentration of formaldehyde is not enough to increase the amount of) mixed into a uniform solution, heated to 30 ° C by adding a drop of sodium hydroxide solution to pH = 6.5-7.5; continued heating to 90 ° C, adding 10 Drops of about glacial acetic acid, so that pH = 5-6; until the reaction subsided and then add about 10 drops of sodium hydroxide, so that pH = 6.5-7; then add the solution amount of 1 / 20-1 / 15 of glacial acetic acid to pH = 3.5-4.5, stir to be made clear and transparent glue. The glue in the square or round metal dish, glass dish or