1、薄 荷,MENTHAE HAPLOCALYCIS HERBA,origin,本品为唇形科植物薄荷Mentha haplocalyx Briq的干燥地上部分。夏、秋二季茎叶茂盛或花开至三轮时,选晴天,分次采割,晒干或阴干。,【性状】 本品茎呈方柱形,有对生分枝,长1540cm,直径0.20.4cm; 表面紫棕色或淡绿色,棱角处具茸毛,节间长25cm;质脆,断面白色,髓部中空。 叶对生,有短柄;叶片皱缩卷曲,完整者展平后呈宽披针形、长椭圆形或卵形,长27cm,宽13cm;上表面深绿色,下表面灰绿色,稀被茸毛,有凹点状腺鳞。 轮伞花序腋生,花萼钟状,先端5齿裂,花冠淡紫色。 揉搓后有特殊清凉香气,味
2、辛凉。,(1) 叶的表面观:腺鳞头部8细胞,直径约至90m,柄单细胞;小腺毛头部及柄部均为单细胞。非腺毛18细胞,常弯曲,壁厚,微具疣状突起。下表皮气孔多见,直轴式。,(2)取本品叶的粉末少量,经微量升华得油状物,加硫酸2滴及香草醛结晶少量,初显黄色至橙黄色,再加水1滴,即变紫红色。,3)取本品粉末0.5g,加石油醚(6090)5ml,密塞,振摇数分钟,放置30分钟,滤过,滤液挥至1ml作为供试品溶液。另取薄荷脑对照药材0.5,同法制成对照药材溶液。再取薄荷脑对照品,加石油醚(60-90)制成每1ml各含2mg的溶液,作为对照品溶液。照薄层色谱法(附录VI B)试验,吸取供试品溶液10-20l
3、、对照药材溶液和对照品溶液各10l,分别点于同一硅胶G薄层板上,以甲苯-乙酸乙酯(19:1)为展开剂,展开,取出,晾干,喷以香草醛硫酸试液-乙醇(1:4)的混合溶液,在1000C加热至斑点显色清晰。供试品色谱中,在与对照药材色谱和对照品色谱相应位置上,显相同颜色的斑点。,Assay,取本品约5mm的短段适量,每100g供试品加水600ml,照挥发油测定法(附录 D)保持微沸3小时测定。 本品含挥发油不得少于0.8%(ml/g)。,Processing,除去老茎及杂质,略喷清水,稍润,切短段,及时低温干燥。多长为5-8mm,墨绿色,紫褐色或浅褐色。按照含量测定项中的挥发油测定法进行测定。挥发油含
4、量不低于0.4%(ml/g)。,地上部分/the aerial / terrestrial part of 性状 when smoothed by immersing in water, Under a magnifying glass, leaf reveals hairs, glandular hairs and scales. It has a characteristic aroma and gives a cool feeling on keeping in the mouth. a deep red to red-brown color develops at the zone o
5、f contact.,挥发油含量 Perform the test with 50.0 g of pulverized Mentha Herb after adding 1 ml of silicone resin to the sample in the flask:,Peppermint(美国药典),Peppermint has an aromatic, characteristic odor and a pungent taste, and produces a cooling sensation in the mouth. It has a characteristic aroma and gives a cool feeling on keeping in the mouth. (日本药局方),be at right angles to/ 与成直角 The smaller type of glandular hair consists of a one- to two-celled stalk and a one-celled glandular head containing volatile oil. palisade parenchyma 栅栏组织 spongy parenchyma 海绵组织,