石油產品(pin)酸值測(ce)定需要的儀器(qi)與試(shi)劑

1、儀器:

錐形瓶:250 mL;球(qiu)形回流冷凝管:長約300 mm;量筒:25 mL、50mL、100mL;微量滴定管:2mL，分度為0。02mL;或5 mL，分度為0。05 mL;小熱板或水浴(yu)。

指示劑:

2、試劑

95%乙(yi)(yi)(yi)醇(chun)(chun)(chun):AR;氫氧(yang)(yang)化鉀(jia):AR，配(pei)成(cheng)0.05mol / L氫氧(yang)(yang)化鉀(jia)乙(yi)(yi)(yi)醇(chun)(chun)(chun)溶(rong)(rong)(rong)液(ye)(ye)(ye);堿(jian)性藍(lan)6B:稱(cheng)(cheng)取(qu)(qu)堿(jian)性藍(lan) 1 g,稱(cheng)(cheng)準(zhun)至(zhi)0.0l g，然(ran)后(hou)將(jiang)它(ta)加在(zai)(zai)50 mL煮(zhu)沸的95%乙(yi)(yi)(yi)醇(chun)(chun)(chun)中，并在(zai)(zai)水浴中回(hui)流lh，冷(leng)卻(que)后(hou)過濾。必要時將(jiang)煮(zhu)熱的澄(cheng)清濾液(ye)(ye)(ye)用(yong)0.05mol / L氫氧(yang)(yang)化鉀(jia)乙(yi)(yi)(yi)醇(chun)(chun)(chun)溶(rong)(rong)(rong)液(ye)(ye)(ye)或(huo)0.05mol / L鹽(yan)酸溶(rong)(rong)(rong)液(ye)(ye)(ye)中和(he),直至(zhi)加入1~2滴堿(jian)溶(rong)(rong)(rong)液(ye)(ye)(ye)能(neng)使(shi)指示劑(ji)溶(rong)(rong)(rong)液(ye)(ye)(ye)從藍(lan)色變(bian)(bian)成(cheng)紅(hong)色，而(er)在(zai)(zai)冷(leng)卻(que)后(hou)又能(neng)恢(hui)復成(cheng)為藍(lan)色為止;甲(jia)酚紅(hong):稱(cheng)(cheng)取(qu)(qu)甲(jia)酚紅(hong)0。1 g,稱(cheng)(cheng)準(zhun)至(zhi)0.001g,研細(xi)后(hou)溶(rong)(rong)(rong)入100mL 95%乙(yi)(yi)(yi)醇(chun)(chun)(chun)中，并在(zai)(zai)水浴中煮(zhu)沸回(hui)流5min,趁熱用(yong)0.05mol / L氫氧(yang)(yang)化鉀(jia)乙(yi)(yi)(yi)醇(chun)(chun)(chun)溶(rong)(rong)(rong)液(ye)(ye)(ye)滴定至(zhi)甲(jia)酚紅(hong)溶(rong)(rong)(rong)液(ye)(ye)(ye)由橘紅(hong)色變(bian)(bian)為深紅(hong)色，而(er)在(zai)(zai)冷(leng)卻(que)后(hou)又能(neng)恢(hui)復成(cheng)橘紅(hong)色為止;酚酞:配(pei)成(cheng)1%乙(yi)(yi)(yi)醇(chun)(chun)(chun)溶(rong)(rong)(rong)液(ye)(ye)(ye).

堿(jian)性(xing)藍(lan)6B:適用于測定深色(se)石油產(chan)品

酚(fen)酞:適用(yong)于測定無色(se)石油產品(pin)或滴(di)定混合物中容易看出顏色(se)的石油產品(pin)