对氯仿蒸发残渣是未来获得的结晶的混合溶剂法。溶解在少量的热苯（约2至4毫升），并添加刚够highboiling（60\'C至90\'C）石油醚（或ligroin）转多云微弱的解决方案。另外，丙酮，可用于简单的结晶，没有第二个溶剂。冷却液通过真空收集在赫氏漏斗过滤用的结晶产品。结晶产品相同的方式秒时间，如果有必要，并允许该产品通过允许它干站在吸入漏斗一段时间。称重产品。沉重的百分比计算的基础上茶叶产量，并确定熔点。如果需要，该产品可进一步纯化，下一次实验中所描述的升华。
得到了剩下的蒸发结晶的下一个是氯仿混合溶剂的方法。溶化在一个小数量(2 ~ 4毫升)的热苯和添加刚好够highboiling(60℃到90℃)石油醚(或ligroin)把解决方案隐约多云。另外,丙酮可以用于简单的结晶没有第二溶剂。把溶液冷却并收集水晶产品采用真空过滤漏斗使用美国好施集团。结晶产品相同的方法一次,如果有必要,并允许产品干,让它站在吸漏斗一会儿。权衡产品。沉重的百分比计算产量和确定基于茶的熔点。如果需要的话,这种产品可以进一步纯化得到了升华为另一个实验。
The residue obtained on evaporation of the chloroform is next crystallized by the mixed solvent method.Diolve it in a small quantity（about 2 to 4ml）of hot benzene and add just enough highboiling (60℃ to 90℃)petroleum ether(or ligroin) to turn the solution faintly cloudy.Alternatively, acetone may be used for simple crystallization without a second solvent.Cool the solution and collect the crystalline product by vacuum filtration using a Hirsch funnel .Crystallize the product the same way a second time if neceary, and allow the product to dry by allowing it to stand in the suction funnel for a while.Weigh the product.Calculate the weighty percentage yield based on tea and determine the melting point.If desired, the product may be further purified by sublimation as described in the next experiment.
The residue obtained on evaporation of the chloroform is next crystallized by the mixed solvent method.
residue：[\'rezi,dju:] n 滤渣,残余物
evaporation：[i,væpə\'reiʃən] n..蒸发;发散
chloroform英音：[\'klɔrəfɔ:m] n.氯仿,三氯甲烷[U]及物动词 vt.用氯仿麻醉；用氯仿杀
crystallize英音：[\'kristəlaiz] 不及物动词 vi.结晶,形成结晶体
crystalline英音：[\'kristəlain] 形容词 a.1.结晶的;结晶质的,结晶状的2.水晶制的3.水晶般的;透
crystallization英音：[\'kristəlai\'zeiʃən] 名词 n.结晶化；结晶体
mix英音：[miks] 及物动词 vt..使混和,搀和[(+with)]
solvent：[\'sɔlvənt] 形容词 a.1.有偿付能力的2.有溶解力的名词 n.[C]1.溶剂
Diolve it in a small quantity（about 2 to 4ml）of hot benzene and add just enough highboiling (60℃ to 90℃)petroleum ether(or ligroin) to turn the solution faintly cloudy.
diolve及物动词 vt.1.分解2.使溶解;使融化;使液化
quantity英音：[\'kwɔntiti] 名词 n.量[U]
benzene：[\'benzi:n] 名词 n..【化】苯
petroleum英音：[pi\'trəuliəm] 名词 n.石油[U]
ether英音：[\'i:θə] 名词 n.【化】乙醚;醚[U
ligroin英音：[\'ligrəuin] 名词 n.轻石油
solution英音：[sə\'lu:ʃən] 溶解,溶化;溶解状态[U]
faintly英音：[\'feintli] 副词 ad.微弱地;黯淡地;模糊地
cloudy英音：[\'klaudi] 模糊不清的,含糊的;混浊的
Alternatively, acetone may be used for simple crystallization without a second solvent.
alternatively英音：[ɔ:l\'tə:nə,tivli] 副词 ad.二者择一地
acetone英音：[\'æsitəun] 名词 n.【化】丙酮
Cool the solution and collect the crystalline product by vacuum filtration using a Hirsch funnel .
Cool: 及物动词 vt.使凉快;使冷却
solution英音：[sə\'lu:ʃən] 名词 n.溶解,溶化;溶解状态[U]溶液,溶剂[C][U] vacuum英音：[\'vækjuəm] 名词 n.真空[C];真空吸尘器;真空装置[C
filtration英音：[fil\'treiʃən] 名词 n.过滤;滤清
Hirsch funnel 赫氏漏斗
Crystallize the product the same way a second time if neceary, and allow the product to dry by allowing it to stand in the suction funnel for a while.
funnel英音：[\'fʌnəl] 名词 n.[C]漏斗
stand英音：[stænd] 停止; 处于某种状态
suction英音：[\'sʌkʃən] 名词 n.[U]吸,吸入;抽吸;吸引
for a while一会儿
Weigh the product.Calculate the weighty percentage yield based on tea and determine the melting point.
weigh及物动词 vt.称...的重量,掂估...的分量
calculate及物动词 vt.计算[+(that)][+wh-]估计;预测;推测[+(that)][+wh-]3计划,打算; weighty英音：[\'weiti] 形容词 a.重的,沉重的繁重的,累人的,重大的,重要的 percentage英音：[pə\'sentidʒ] 名词 n.百分率,百分比[C][S1][(+of)] yield英音：[ji:ld] 名词 n.产量;收获量;收益,利润[C][U]
determine英音：[di\'tə:min] 确定;测定[+wh-]决定
melting英音：[\'meltiŋ] 形容词 a.熔化
If desired, the product may be further purified by sublimation as described in the next experiment.
purify英音：[\'pjuərifai] 及物动词 vt.使纯净,净化;使纯粹提纯,精炼
sublimation英音：[,sʌbli\'meiʃən] 名词 n.升华升华物
