蛤士蟆生長期為5~7年,以性成熟後的1~2年(nian)內(nei)產(chan)卵(luan)最(zui)多(duo),第(di)三(san)年(nian)蛙(wa)體(ti)的(de)油(you)質(zhi)最(zui)佳(jia)。蛤(ha)士(shi)膜(mo)秋(qiu)季(ji)有(you)趨(qu)光(guang)特(te)性(xing),夜(ye)間(jian)可(ke)懸(xuan)燈(deng)守(shou)捕(bu),燈(deng)下(xia)麵(mian)放(fang)一(yi)麻(ma)袋(dai),蛤(ha)士(shi)蟆(ma)會(hui)自(zi)動(dong)跳(tiao)入(ru)麻(ma)袋(dai)中(zhong),清(qing)晨(chen)收(shou)回(hui),一(yi)夜(ye)可(ke)捕(bu)25~30隻。10月中下旬,蛤士蟆散居在河流各處,如天氣暖和,可下河找其洞穴捕捉。9~10月為捕捉蛤士蟆的季節,霜降期間采得的雌油質量最好,價格最高。將捕到的蛤士蟆用麻繩穿過吻端,每200~300隻串在一起,係於通風處風幹。剝油前,將幹製蛤士蟆用熱水浸潤一下,置於溫暖室內用濕麻袋悶蓋—夜ye,剖pou腹fu,取qu出chu輸shu卵luan管guan,棄qi去qu蛙wa卵luan及ji內nei髒zang,置zhi通tong風feng處chu晾liang幹gan。幹gan製zhi蛤ha士shi蟆ma剝bo取qu蛤ha士shi蟆ma油you的de加jia工gong繁fan雜za,難nan以yi幹gan透tou,品pin味wei不bu良liang。最zui好hao采cai用yong鮮xian剝bo油you法fa,即ji將jiang雌ci蛤ha士shi蟆ma燙tang死si後hou,剖pou腹fu取qu油you,幹gan燥zao備bei用yong或huo加jia工gong成cheng散san劑ji應ying用yong。
蛤士膜油真偽鑒別:真品蛤士蟆油呈不規則形並相互重疊成厚塊,或呈半月形彎曲;外表黃白色、黃huang色se,凹ao凸tu不bu平ping,有you裂lie紋wen,有you灰hui白bai色se皮pi膜mo粘zhan連lian,可ke見jian明ming顯xian的de紅hong色se毛mao細xi血xue管guan,半ban透tou明ming,有you脂zhi肪fang樣yang光guang澤ze,富fu含han油you性xing,手shou摸mo有you滑hua膩ni感gan,氣qi味wei極ji腥xing,味wei微wei苦ku,嚼jiao之zhi粘zhan滑hua;遇水膨脹10~15倍。偽品常用蟾蜍(癩蛤蟆)deganzaoshuluanguan,qichengjichangzhuangzhongdiehuopanjuanchengchuanzhuanghuoniuqujiaocuochengtuankuaizhuang,biaomianhuangsehuohuanghese,youbaisepimoxianglian,oujianmaoxixueguan,bantouming,wuguangze,shaojuyouxing;質脆而硬,易折斷,手摸無滑膩感,可見到外粘的黑色卵粒;氣味腥,味淡,微有麻舌感;水泡1天外形基本不變,水泡3天後全部縱向破裂。
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