關于(yu)世紀森朗電(dian)(dian)(dian)化學反應釜,專用(yong)電(dian)(dian)(dian)化學分析儀(yi)/工(gong)作站的電(dian)(dian)(dian)化學測量系統(tong)。儀(yi)器(qi)內含(han)快速(su)數(shu)字信(xin)(xin)號(hao)發生器(qi),用(yong)于(yu)高(gao)(gao)頻交流(liu)(liu)(liu)阻抗測量的直(zhi)接數(shu)字信(xin)(xin)號(hao)合成器(qi),雙(shuang)通(tong)道高(gao)(gao)速(su)數(shu)據采集系統(tong),電(dian)(dian)(dian)位(wei)電(dian)(dian)(dian)流(liu)(liu)(liu)信(xin)(xin)號(hao)濾(lv)波器(qi),多級信(xin)(xin)號(hao)增(zeng)益,iR降補償電(dian)(dian)(dian)路,以及恒電(dian)(dian)(dian)位(wei)儀(yi)/恒電(dian)(dian)(dian)流(liu)(liu)(liu)儀(yi)。電(dian)(dian)(dian)位(wei)范圍為±10V,電(dian)(dian)(dian)流(liu)(liu)(liu)范圍為±250mA。電(dian)(dian)(dian)流(liu)(liu)(liu)測量下限低于(yu)10pA。可(ke)直(zhi)接用(yong)于(yu)超微(wei)電(dian)(dian)(dian)極(ji)上的穩態電(dian)(dian)(dian)流(liu)(liu)(liu)測量。如果與CHI200B微(wei)電(dian)(dian)(dian)流(liu)(liu)(liu)放大器(qi)及屏蔽箱連(lian)接,可(ke)測量1pA或(huo)更(geng)低的電(dian)(dian)(dian)流(liu)(liu)(liu)。
光(guang)電(dian)(dian)(dian)(dian)化學(xue)反應釜專用電(dian)(dian)(dian)(dian)化學(xue)工(gong)作(zuo)站,如(ru)果與大(da)電(dian)(dian)(dian)(dian)流(liu)放大(da)器(qi)(qi)連接,電(dian)(dian)(dian)(dian)流(liu)范(fan)圍(wei)可(ke)(ke)(ke)拓寬(kuan)為(wei)±2A。信(xin)號(hao)發生器(qi)(qi)的(de)(de)(de)(de)更新速(su)(su)率為(wei)10MHz,數據采(cai)(cai)(cai)集采(cai)(cai)(cai)用兩個同(tong)步16位高(gao)分(fen)辨低噪聲的(de)(de)(de)(de)模數轉(zhuan)換(huan)器(qi)(qi),雙通(tong)道(dao)同(tong)時(shi)(shi)采(cai)(cai)(cai)樣的(de)(de)(de)(de)最高(gao)速(su)(su)率為(wei)1MHz。雙通(tong)道(dao)同(tong)步電(dian)(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)(dian)位采(cai)(cai)(cai)樣可(ke)(ke)(ke)加快阻(zu)抗測量(liang)(liang)的(de)(de)(de)(de)速(su)(su)度(du)。一(yi)些實驗方法的(de)(de)(de)(de)時(shi)(shi)間尺度(du)可(ke)(ke)(ke)達十個數量(liang)(liang)級,動態(tai)范(fan)圍(wei)極(ji)為(wei)寬(kuan)廣。循環伏安(an)法的(de)(de)(de)(de)掃(sao)描速(su)(su)度(du)為(wei)1000V/s時(shi)(shi),電(dian)(dian)(dian)(dian)位增量(liang)(liang)僅0.1mV,當掃(sao)描速(su)(su)度(du)為(wei)5000V/s時(shi)(shi),電(dian)(dian)(dian)(dian)位增量(liang)(liang)為(wei)1mV。又如(ru)交流(liu)阻(zu)抗的(de)(de)(de)(de)測量(liang)(liang)頻(pin)率可(ke)(ke)(ke)達1MHz,交流(liu)伏安(an)法的(de)(de)(de)(de)頻(pin)率可(ke)(ke)(ke)達10KHz。儀(yi)器(qi)(qi)可(ke)(ke)(ke)工(gong)作(zuo)于(yu)二,三,或四電(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)(de)方式。四電(dian)(dian)(dian)(dian)極(ji)可(ke)(ke)(ke)用于(yu)液(ye)(ye)/液(ye)(ye)界(jie)面電(dian)(dian)(dian)(dian)化學(xue)測量(liang)(liang),對于(yu)大(da)電(dian)(dian)(dian)(dian)流(liu)或低阻(zu)抗電(dian)(dian)(dian)(dian)解池(chi)(例(li)如(ru)電(dian)(dian)(dian)(dian)池(chi))也(ye)十分(fen)重要,可(ke)(ke)(ke)消除由于(yu)電(dian)(dian)(dian)(dian)纜(lan)和(he)接觸電(dian)(dian)(dian)(dian)阻(zu)引起的(de)(de)(de)(de)測量(liang)(liang)誤差(cha)。儀(yi)器(qi)(qi)還有外部(bu)信(xin)號(hao)輸(shu)入通(tong)道(dao),同(tong)步16位高(gao)分(fen)辨采(cai)(cai)(cai)樣的(de)(de)(de)(de)最高(gao)速(su)(su)率為(wei)1MHz。可(ke)(ke)(ke)在記(ji)錄(lu)電(dian)(dian)(dian)(dian)化學(xue)信(xin)號(hao)的(de)(de)(de)(de)同(tong)時(shi)(shi)記(ji)錄(lu)外部(bu)輸(shu)入的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓信(xin)號(hao),例(li)如(ru)光(guang)譜(pu)信(xin)號(hao)等。這對光(guang)譜(pu)電(dian)(dian)(dian)(dian)化學(xue)等實驗極(ji)為(wei)方便。
電(dian)(dian)(dian)化學反應(ying)釜專用(yong)(yong)電(dian)(dian)(dian)化學分析(xi)儀(yi)/工作站硬件(jian)(jian)采用(yong)(yong)了(le)高(gao)(gao)速(su)的(de)(de)(de)處理器(qi)(qi)(qi),快(kuai)速(su)的(de)(de)(de)放大器(qi)(qi)(qi),快(kuai)速(su)的(de)(de)(de)模數轉(zhuan)換(huan)(huan)(huan)器(qi)(qi)(qi)和數模轉(zhuan)換(huan)(huan)(huan)器(qi)(qi)(qi)。計時電(dian)(dian)(dian)量(liang)法加上(shang)了(le)模擬積分器(qi)(qi)(qi)。一個16位高(gao)(gao)分辨高(gao)(gao)穩定的(de)(de)(de)電(dian)(dian)(dian)流偏置(zhi)電(dian)(dian)(dian)路(lu)以達到電(dian)(dian)(dian)流復零(ling)輸出(chu),亦可(ke)用(yong)(yong)于提高(gao)(gao)交流測量(liang)的(de)(de)(de)電(dian)(dian)(dian)流動態(tai)范(fan)圍(wei)。高(gao)(gao)分辨的(de)(de)(de)模數轉(zhuan)換(huan)(huan)(huan)器(qi)(qi)(qi)具有(you)更(geng)(geng)(geng)好的(de)(de)(de)信噪比,也給出(chu)了(le)靈敏度(du)設置(zhi)的(de)(de)(de)更(geng)(geng)(geng)大動態(tai)范(fan)圍(wei)。內部控(kong)制程(cheng)序(xu)采用(yong)(yong)了(le)FLASH存儲器(qi)(qi)(qi)。儀(yi)器(qi)(qi)(qi)軟件(jian)(jian)的(de)(de)(de)更(geng)(geng)(geng)新(xin)不再需(xu)要通(tong)(tong)過郵(you)寄(ji)并更(geng)(geng)(geng)換(huan)(huan)(huan)EPROM,而(er)可(ke)以通(tong)(tong)過網(wang)絡(luo)進行傳送并通(tong)(tong)過程(cheng)序(xu)命令寫入,這使(shi)得軟件(jian)(jian)更(geng)(geng)(geng)新(xin)更(geng)(geng)(geng)加快(kuai)捷方(fang)便。