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  • 2023-05-31

    硫(liu)(liu)含(han)(han)量(liang)測(ce)定用(yong)標(biao)(biao)準(zhun)(zhun)物(wu)質(硫(liu)(liu)標(biao)(biao)樣)隨著(zhu)環(huan)保意識(shi)的(de)(de)(de)逐漸(jian)增強,現代(dai)社(she)會對硫(liu)(liu)的(de)(de)(de)排放要求(qiu)越來越嚴格(ge)。因此(ci),在(zai)(zai)各種工業(ye)(ye)生產過程中(zhong),對硫(liu)(liu)含(han)(han)量(liang)進行精確的(de)(de)(de)測(ce)定成(cheng)為了(le)(le)必(bi)要環(huan)節。而(er)標(biao)(biao)準(zhun)(zhun)物(wu)質的(de)(de)(de)硫(liu)(liu)標(biao)(biao)樣,作為硫(liu)(liu)含(han)(han)量(liang)測(ce)定的(de)(de)(de)基準(zhun)(zhun)物(wu)質,在(zai)(zai)硫(liu)(liu)含(han)(han)量(liang)的(de)(de)(de)測(ce)定中(zhong)扮演(yan)了(le)(le)重要的(de)(de)(de)角(jiao)色(se)。本(ben)文將詳(xiang)細介紹硫(liu)(liu)標(biao)(biao)樣的(de)(de)(de)作用(yong)、特點、制備方法及應用(yong)。通過使用(yong)已知硫(liu)(liu)含(han)(han)量(liang)的(de)(de)(de)硫(liu)(liu)標(biao)(biao)樣作為標(biao)(biao)準(zhun)(zhun),可以校(xiao)準(zhun)(zhun)實(shi)驗室儀器,確保測(ce)試結果的(de)(de)(de)準(zhun)(zhun)確性(xing)。質量(liang)控制:在(zai)(zai)工業(ye)(ye)生產過程中(zhong),實(shi)驗室人員可以通過對比不同批次硫(liu)(liu)標(biao)(biao)樣的(de)(de)(de)組成(cheng),來監控生產過程中(zhong)的(de)(de)(de)質量(liang)控制。如果不同批次硫(liu)(liu)標(biao)(biao)樣...

  • 2023-03-15

    硫(liu)含量(liang)測定(ding)是化(hua)(hua)(hua)學分(fen)析的(de)(de)(de)一(yi)個重(zhong)要(yao)分(fen)支,其精度和準(zhun)確性(xing)直接影(ying)響到(dao)分(fen)析結(jie)果的(de)(de)(de)可(ke)靠(kao)(kao)性(xing)。為(wei)了保(bao)證硫(liu)含量(liang)測定(ding)的(de)(de)(de)準(zhun)確性(xing),需(xu)要(yao)使用硫(liu)標(biao)樣進行校準(zhun)。本文將介紹硫(liu)標(biao)樣的(de)(de)(de)技術知(zhi)識(shi)。1.硫(liu)標(biao)樣的(de)(de)(de)定(ding)義(yi)硫(liu)標(biao)樣是一(yi)種(zhong)可(ke)靠(kao)(kao)的(de)(de)(de)硫(liu)含量(liang)參照物,常常是硫(liu)化(hua)(hua)(hua)鐵(tie)等(deng)化(hua)(hua)(hua)合物,它(ta)具(ju)(ju)有(you)已知(zhi)的(de)(de)(de)硫(liu)含量(liang),可(ke)以(yi)用來校準(zhun)硫(liu)含量(liang)測定(ding)的(de)(de)(de)儀器。硫(liu)標(biao)樣的(de)(de)(de)制備(bei)需(xu)要(yao)具(ju)(ju)有(you)較高的(de)(de)(de)純(chun)度、穩定(ding)性(xing)和可(ke)重(zhong)復性(xing)。2.硫(liu)標(biao)樣的(de)(de)(de)制備(bei)硫(liu)標(biao)樣的(de)(de)(de)制備(bei)需(xu)要(yao)選擇適當的(de)(de)(de)化(hua)(hua)(hua)合物作(zuo)為(wei)原料。目前(qian)常用的(de)(de)(de)硫(liu)標(biao)樣有(you)硫(liu)化(hua)(hua)(hua)鐵(tie)、巴斯德(de)石膏和硫(liu)酸銨等(deng)。其中,硫(liu)化(hua)(hua)(hua)鐵(tie)是的(de)(de)(de)硫(liu)標(biao)樣,它(ta)可(ke)以(yi)通過將鐵(tie)和硫(liu)粉末...

  • 2021-11-26

    為了研究電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)表面電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)密度(du)的(de)(de)分布情況、減少或消除擴散層(ceng)等(deng)因素的(de)(de)影響(xiang),電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化學研究人員通過對比各種(zhong)(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)和攪拌的(de)(de)方式,開發出(chu)了一(yi)種(zhong)(zhong)(zhong)高(gao)速(su)旋轉(zhuan)(zhuan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji),由于這(zhe)種(zhong)(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)的(de)(de)端(duan)面像一(yi)個盤,所以(yi)也叫旋轉(zhuan)(zhuan)圓盤電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(rotatingdiskelectrode,RDE),簡稱旋盤電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji),還(huan)叫轉(zhuan)(zhuan)盤電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)。還(huan)有基于這(zhe)種(zhong)(zhong)(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)進一(yi)步改進了的(de)(de)旋轉(zhuan)(zhuan)圓環電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)等(deng),可以(yi)測量更為復(fu)雜的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)過程(cheng)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化學參數。基本原理旋轉(zhuan)(zhuan)圓盤電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)理論(lun)與(yu)流(liu)體動力學結合(he)的(de)(de)產物(wu),因此它也稱為流(liu)體動力學電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)。其工作(zuo)原理的(de)(de)基本要點是(shi):物(wu)質傳遞和電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)密度(du)...

  • 2020-03-26

    紫(zi)外(wai)熒光(guang)(guang)硫測(ce)定儀(yi)主要用于石油(you)產(chan)品(pin),也根(gen)據方法檢(jian)(jian)測(ce)有機(ji)材料(如工業化(hua)(hua)學品(pin)、橡膠、合成纖(xian)維,等等);具體(ti)如原油(you)、餾分(fen)油(you)、石油(you)氣(qi)、塑料、石油(you)化(hua)(hua)工產(chan)品(pin)、食物等行業。當樣品(pin)被高溫(wen)燃燒后,產(chan)生(sheng)礦化(hua)(hua)效應,即硫元素被氧化(hua)(hua)生(sheng)成SO2分(fen)子,通過UV熒光(guang)(guang)器(當激發(fa)態的(de)(de)SO2分(fen)子返回(hui)基態時,會發(fa)射UV光(guang)(guang),可(ke)(ke)被光(guang)(guang)電(dian)子倍增檢(jian)(jian)測(ce)器捕捉)可(ke)(ke)精確(que)測(ce)量其(qi)含量。紫(zi)外(wai)熒光(guang)(guang)硫測(ce)定儀(yi)的(de)(de)靈敏度高,采(cai)用先進的(de)(de)分(fen)析方法,關鍵部(bu)件(jian)采(cai)用進口器件(jian),使得(de)整機(ji)性能(neng)有了可(ke)(ke)靠(kao)的(de)(de)保證。重復性好,工作曲線一經標定,可(ke)(ke)供長期使用,減少因不同(tong)操作...

  • 2020-03-24

    化(hua)學耗氧量(liang)測(ce)(ce)(ce)定(ding)(ding)(ding)儀能(neng)準確(que)測(ce)(ce)(ce)定(ding)(ding)(ding)地表水(shui)、中(zhong)(zhong)水(shui)、城市污水(shui)、工業廢(fei)水(shui)中(zhong)(zhong)化(hua)學耗氧量(liang)(COD)含(han)量(liang),濃度直(zhi)讀。內(nei)存99條(tiao)曲線(xian),10條(tiao)回歸(gui)曲線(xian),可自行修定(ding)(ding)(ding)保存;高容量(liang)數(shu)(shu)據(ju)存儲(chu)功(gong)(gong)能(neng),液晶高亮顯示、打印當前和歷史(shi)數(shu)(shu)據(ju)及定(ding)(ding)(ding)時提醒功(gong)(gong)能(neng),電池電量(liang)提醒功(gong)(gong)能(neng),能(neng)夠持續(xu)消解數(shu)(shu)十支(zhi)水(shui)樣。化(hua)學耗氧量(liang)測(ce)(ce)(ce)定(ding)(ding)(ding)儀根(gen)據(ju)庫(ku)侖(lun)分析(xi)的原理設計制造的,該法具有準確(que)度高、簡便(bian)、快速、測(ce)(ce)(ce)量(liang)范圍較寬等特(te)點,國家(jia)環保總(zong)局在《水(shui)和廢(fei)水(shui)監(jian)測(ce)(ce)(ce)分析(xi)方法》中(zhong)(zhong)已將庫(ku)侖(lun)分析(xi)法列(lie)為試行分析(xi)法。化(hua)學耗氧量(liang)(COD)的常(chang)規測(ce)(ce)(ce)定(ding)(ding)(ding)中(zhong)(zhong)包含(han)腐殖酸,即COD值是腐殖...

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