低價供應YG-M18a酸值測定儀
低價供(gong)應YG-M18a酸值(zhi)(zhi)測定儀
試樣溶(rong)解在(zai)含有少量水的甲苯異(yi)(yi)丙醇混(hun)合溶(rong)劑(ji)中,以氫氧化鉀異(yi)(yi)丙醇標準(zhun)溶(rong)液為滴(di)定劑(ji)進行電(dian)(dian)位滴(di)定,所用的電(dian)(dian)極(ji)對為玻璃(li)指示電(dian)(dian)極(ji)甘汞(gong)參比電(dian)(dian)極(ji),在(zai)手繪或自動繪制的電(dian)(dian)位滴(di)定劑(ji)量的曲線上僅(jin)把明顯突躍點作為終(zhong)(zhong)點,如(ru)果沒有明顯突躍點,則以相應的新配非水酸性(xing)或堿(jian)性(xing)緩沖溶(rong)液的電(dian)(dian)位值(zhi)(zhi)作為滴(di)定終(zhong)(zhong)點。
廠商性質:生產廠家 更新日期:2023-08-07 瀏覽次數:506