石油產品酸值(zhi)測定需要的儀器與試劑(ji)

1、儀器:

錐形瓶:250 mL;球形回流(liu)冷凝管:長約300 mm;量筒(tong):25 mL、50mL、100mL;微量滴定管:2mL，分(fen)度為0。02mL;或5 mL，分(fen)度為0。05 mL;小熱(re)板或水浴。

指示劑:

2、試劑

95%乙(yi)(yi)醇:AR;氫(qing)(qing)氧(yang)化(hua)鉀(jia):AR，配成(cheng)0.05mol / L氫(qing)(qing)氧(yang)化(hua)鉀(jia)乙(yi)(yi)醇溶(rong)(rong)(rong)液(ye);堿性藍(lan)(lan)6B:稱(cheng)(cheng)取堿性藍(lan)(lan) 1 g,稱(cheng)(cheng)準(zhun)至0.0l g，然后將它(ta)加(jia)在(zai)(zai)(zai)50 mL煮(zhu)沸(fei)的95%乙(yi)(yi)醇中(zhong)，并在(zai)(zai)(zai)水(shui)浴中(zhong)回(hui)流lh，冷(leng)卻后過濾。必要時將煮(zhu)熱(re)的澄清濾液(ye)用0.05mol / L氫(qing)(qing)氧(yang)化(hua)鉀(jia)乙(yi)(yi)醇溶(rong)(rong)(rong)液(ye)或0.05mol / L鹽酸溶(rong)(rong)(rong)液(ye)中(zhong)和(he),直至加(jia)入1~2滴堿溶(rong)(rong)(rong)液(ye)能使指示劑溶(rong)(rong)(rong)液(ye)從藍(lan)(lan)色(se)變成(cheng)紅色(se)，而在(zai)(zai)(zai)冷(leng)卻后又(you)能恢復成(cheng)為藍(lan)(lan)色(se)為止;甲(jia)酚(fen)紅:稱(cheng)(cheng)取甲(jia)酚(fen)紅0。1 g,稱(cheng)(cheng)準(zhun)至0.001g,研(yan)細后溶(rong)(rong)(rong)入100mL 95%乙(yi)(yi)醇中(zhong)，并在(zai)(zai)(zai)水(shui)浴中(zhong)煮(zhu)沸(fei)回(hui)流5min,趁(chen)熱(re)用0.05mol / L氫(qing)(qing)氧(yang)化(hua)鉀(jia)乙(yi)(yi)醇溶(rong)(rong)(rong)液(ye)滴定至甲(jia)酚(fen)紅溶(rong)(rong)(rong)液(ye)由橘(ju)紅色(se)變為深紅色(se)，而在(zai)(zai)(zai)冷(leng)卻后又(you)能恢復成(cheng)橘(ju)紅色(se)為止;酚(fen)酞:配成(cheng)1%乙(yi)(yi)醇溶(rong)(rong)(rong)液(ye).

堿(jian)性藍6B:適用于測定(ding)深色(se)石(shi)油產品

酚(fen)酞:適用于(yu)測定(ding)無色(se)(se)石(shi)(shi)油(you)產(chan)品或(huo)滴定(ding)混合物中容(rong)易看出顏色(se)(se)的石(shi)(shi)油(you)產(chan)品