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德(de)(de)國(guo)(guo)德(de)(de)圖集團(tuan)公(gong)司(TestoAG)www.testo.com.cnwww.testo.com“德(de)(de)國(guo)(guo)德(de)(de)圖集團(tuan)公(gong)司(TestoAG)”始創于1957年,位于德(de)(de)國(guo)(guo)蘭斯克市(Lenzkirch),是zui大的便攜式測(ce)量儀器專(zhuan)業制造(zao)商(shang)。德(de)(de)圖儀器貿易(yi)(上海)有限公(gong)司是德(de)(de)國(guo)(guo)德(de)(de)圖集團(tuan)公(gong)司(TestoAG)在中國(guo)(guo)的子公(gong)司,成(cheng)立于2002年,目前在中國(guo)(guo)香(xiang)港(gang)、成(cheng)都(dou)、廣州和北京設有辦事處,并在上海及香(xiang)港(gang)設有售后服(fu)務中心(xin)。我們在中國(guo)(guo)的主要業務領域(yu)包括(kuo):1、節能、環保、鍋爐(lu)、窯爐(lu)、煉鋼(gang)廠(chang)、電廠(chang)、水(shui)泥廠(chang)等(deng)...

  • 2024

    3-8

    熱電(dian)紫(zi)外(wai)分(fen)光(guang)光(guang)度(du)計是一種(zhong)實驗室分(fen)析儀器(qi),它(ta)(ta)(ta)通(tong)過測(ce)量樣(yang)(yang)品在紫(zi)外(wai)-可(ke)(ke)見光(guang)譜區域(yu)的(de)吸(xi)收(shou)情況,來確定樣(yang)(yang)品中特定物質的(de)濃(nong)度(du)。這種(zhong)儀器(qi)廣泛應(ying)用于多個行業,因為(wei)它(ta)(ta)(ta)可(ke)(ke)以(yi)適應(ying)不同領域(yu)的(de)需求。熱電(dian)紫(zi)外(wai)分(fen)光(guang)光(guang)度(du)計的(de)原理基(ji)于分(fen)子對特定波(bo)長光(guang)線(xian)的(de)吸(xi)收(shou)特性。它(ta)(ta)(ta)通(tong)常由以(yi)下五(wu)個基(ji)本部(bu)件組(zu)成(cheng):1.光(guang)源:產生復(fu)合光(guang),即包含多種(zhong)波(bo)長的(de)光(guang)。2.單(dan)(dan)色(se)器(qi):也稱為(wei)分(fen)光(guang)系統,用于將復(fu)合光(guang)分(fen)解成(cheng)單(dan)(dan)一波(bo)長的(de)光(guang)。3.吸(xi)收(shou)池(chi):樣(yang)(yang)品容器(qi),其中放置待測(ce)樣(yang)(yang)品,單(dan)(dan)色(se)光(guang)通(tong)過時部(bu)分(fen)被樣(yang)(yang)品吸(xi)收(shou)。4.檢(jian)測(ce)器(qi):接(jie)收(shou)通(tong)過樣(yang)(yang)品后未被吸(xi)收(shou)的(de)光(guang),并(bing)將其轉換...

  • 2023

    6-7

    熱電紫外(wai)分(fen)光(guang)(guang)光(guang)(guang)度(du)(du)計是一種廣泛應用(yong)于(yu)生(sheng)物(wu)(wu)(wu)化學(xue)(xue)(xue)(xue)、藥物(wu)(wu)(wu)化學(xue)(xue)(xue)(xue)、環境科(ke)學(xue)(xue)(xue)(xue)等領域的(de)儀(yi)器,用(yong)于(yu)測量物(wu)(wu)(wu)質在紫外(wai)光(guang)(guang)區間內的(de)吸收(shou)光(guang)(guang)譜。該儀(yi)器利用(yong)了物(wu)(wu)(wu)質吸收(shou)特定波(bo)長的(de)光(guang)(guang)的(de)原(yuan)理(li),通過(guo)檢測樣(yang)品(pin)吸收(shou)的(de)紫外(wai)線輻射能量,可(ke)以獲得物(wu)(wu)(wu)質的(de)濃度(du)(du)信息。主要用(yong)于(yu)分(fen)析物(wu)(wu)(wu)質的(de)濃度(du)(du)、純度(du)(du)、反應動力學(xue)(xue)(xue)(xue)和化學(xue)(xue)(xue)(xue)結構等信息。它具有(you)(you)快(kuai)速、準確、可(ke)靠(kao)等優點,對于(yu)樣(yang)品(pin)的(de)分(fen)析精(jing)度(du)(du)高,靈(ling)敏度(du)(du)高,并且可(ke)以進行在線連續監測。因此(ci),該儀(yi)器被廣泛應用(yong)于(yu)生(sheng)命(ming)科(ke)學(xue)(xue)(xue)(xue)、醫(yi)藥、化工、環保等領域,對于(yu)研究與(yu)發現新藥、生(sheng)物(wu)(wu)(wu)分(fen)子、污(wu)染源(yuan)等有(you)(you)著(zhu)重要的(de)作用(yong)。熱電紫外(wai)分(fen)...

  • 2022

    3-23

    熱電(dian)紫(zi)外分(fen)光(guang)(guang)光(guang)(guang)度計(ji)使用誤(wu)差分(fen)析(xi):分(fen)光(guang)(guang)光(guang)(guang)度法(fa)的(de)最重要的(de)一(yi)(yi)個物理(li)化學量是(shi)(shi)吸光(guang)(guang)度。為了獲(huo)得準(zhun)確的(de)研究結果,準(zhun)確測得樣品溶液的(de)吸光(guang)(guang)度是(shi)(shi)非常重要的(de)。一(yi)(yi)般,分(fen)析(xi)結果的(de)不(bu)可靠性與偶(ou)然(ran)誤(wu)差和(he)系統(tong)(tong)誤(wu)差有關。偶(ou)然(ran)誤(wu)差影響(xiang)測量的(de)精密(mi)度,可通過足(zu)夠數量測量的(de)統(tong)(tong)計(ji)處(chu)理(li)來減少;系統(tong)(tong)誤(wu)差影響(xiang)測量結果的(de)準(zhun)確度,可在大體相同實驗條(tiao)件(jian)下(xia),用比(bi)較一(yi)(yi)種(zhong)物質的(de)準(zhun)確測量結果,使系統(tong)(tong)誤(wu)差統(tong)(tong)一(yi)(yi)起來。而分(fen)光(guang)(guang)光(guang)(guang)度計(ji)的(de)系統(tong)(tong)誤(wu)差(波長(chang)校正、分(fen)光(guang)(guang)光(guang)(guang)度計(ji)的(de)慢散光(guang)(guang)、放大器(qi)(qi)的(de)線性響(xiang)應(ying)、暗電(dian)流和(he)比(bi)色皿的(de)光(guang)(guang)程)和(he)操作誤(wu)差(溫度改變、儀器(qi)(qi)讀(du)數、...

  • 2021

    11-26

    紅(hong)外光(guang)(guang)譜(pu)(pu)是(shi)一種(zhong)帶有(you)物(wu)質信息的(de)(de)譜(pu)(pu)圖,是(shi)由于紅(hong)外光(guang)(guang)照射頻(pin)率與分(fen)子振(zhen)動頻(pin)率相同時,分(fen)子的(de)(de)振(zhen)動產生(sheng)吸(xi)收得到(dao)圖譜(pu)(pu)。智能(neng)葉紅(hong)外光(guang)(guang)譜(pu)(pu)儀是(shi)一種(zhong)擁有(you)快速成(cheng)像技術(shu)并能(neng)夠(gou)達到(dao)無損無污染化(hua)(hua)的(de)(de)檢(jian)測(ce)技術(shu),具(ju)有(you)譜(pu)(pu)圖合一、微區分(fen)析、需樣量(liang)小、高(gao)精度和(he)高(gao)靈敏(min)度等優點,是(shi)了解復(fu)雜(za)物(wu)質的(de)(de)空(kong)間(jian)分(fen)布和(he)分(fen)子組(zu)成(cheng)的(de)(de)強有(you)力(li)方法,并且(qie)傅里葉紅(hong)外光(guang)(guang)譜(pu)(pu)儀測(ce)試樣品類型(xing)廣泛其中包(bao)括(kuo)固、液、氣態(tai)樣品。能(neng)夠(gou)量(liang)測(ce)有(you)機(ji)化(hua)(hua)合物(wu)紅(hong)外譜(pu)(pu)圖,不(bu)僅應用于食品分(fen)析、有(you)機(ji)化(hua)(hua)學(xue)、石(shi)油化(hua)(hua)工、醫學(xue)分(fen)析等傳統領域(yu),并且(qie)在光(guang)(guang)學(xue)、半導體及電子設(she)備等新興技術(shu)領域(yu)也(ye)有(you)重...

  • 2021

    9-10

    iCE原(yuan)子(zi)吸(xi)(xi)(xi)收光譜(pu)儀基(ji)態(tai)原(yuan)子(zi)吸(xi)(xi)(xi)收其共振輻射,外層電(dian)子(zi)由(you)基(ji)態(tai)躍遷(qian)至激(ji)發態(tai)而產生原(yuan)子(zi)吸(xi)(xi)(xi)收光譜(pu)。原(yuan)子(zi)吸(xi)(xi)(xi)收光譜(pu)位于光譜(pu)的(de)(de)(de)(de)紫(zi)外區和可(ke)見(jian)區。原(yuan)子(zi)吸(xi)(xi)(xi)收光譜(pu)線(xian)并不(bu)(bu)是(shi)嚴格地幾(ji)何意義上的(de)(de)(de)(de)線(xian)(幾(ji)何線(xian)無寬(kuan)度(du)),而是(shi)有相當窄的(de)(de)(de)(de)頻率或波長范圍,即有一(yi)定的(de)(de)(de)(de)寬(kuan)度(du)。一(yi)束不(bu)(bu)同頻率強(qiang)度(du)為I0的(de)(de)(de)(de)平行(xing)光通(tong)過(guo)厚度(du)為l的(de)(de)(de)(de)原(yuan)子(zi)蒸氣(qi)(qi),一(yi)部分(fen)光被吸(xi)(xi)(xi)收,透過(guo)光的(de)(de)(de)(de)強(qiang)度(du)Iv服(fu)從(cong)吸(xi)(xi)(xi)收定律。吸(xi)(xi)(xi)收強(qiang)度(du)與分(fen)析物質(zhi)濃度(du)的(de)(de)(de)(de)關系(xi)原(yuan)子(zi)蒸氣(qi)(qi)對(dui)不(bu)(bu)同頻率的(de)(de)(de)(de)光具有不(bu)(bu)同的(de)(de)(de)(de)吸(xi)(xi)(xi)收率,因此(ci),原(yuan)子(zi)蒸氣(qi)(qi)對(dui)光的(de)(de)(de)(de)吸(xi)(xi)(xi)收是(shi)頻率的(de)(de)(de)(de)函(han)數。但是(shi)對(dui)固定頻率的(de)(de)(de)(de)光,原(yuan)子(zi)蒸氣(qi)(qi)對(dui)它的(de)(de)(de)(de)吸(xi)(xi)(xi)收是(shi)與...

  • 2021

    8-11

    原(yuan)(yuan)子(zi)吸(xi)收(shou)光(guang)譜(pu)儀是原(yuan)(yuan)子(zi)發(fa)(fa)射(she)(she)光(guang)譜(pu)的(de)(de)(de)逆(ni)過程。基態(tai)(tai)原(yuan)(yuan)子(zi)只能(neng)吸(xi)收(shou)頻(pin)率為(wei)ν=(Eq-E0)/h的(de)(de)(de)光(guang),躍(yue)遷到高能(neng)態(tai)(tai)Eq。因(yin)此(ci),原(yuan)(yuan)子(zi)吸(xi)收(shou)光(guang)譜(pu)的(de)(de)(de)譜(pu)線(xian)(xian)也(ye)取決于(yu)元素(su)(su)(su)的(de)(de)(de)原(yuan)(yuan)子(zi)結構,每一種(zhong)元素(su)(su)(su)都有(you)其(qi)特(te)征的(de)(de)(de)吸(xi)收(shou)光(guang)譜(pu)線(xian)(xian)。原(yuan)(yuan)子(zi)的(de)(de)(de)電子(zi)從(cong)基態(tai)(tai)激發(fa)(fa)到接近于(yu)基態(tai)(tai)的(de)(de)(de)激發(fa)(fa)態(tai)(tai),稱(cheng)(cheng)為(wei)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)激發(fa)(fa)。當(dang)電子(zi)從(cong)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)激發(fa)(fa)態(tai)(tai)躍(yue)遷回基態(tai)(tai)時,稱(cheng)(cheng)為(wei)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)躍(yue)遷。這種(zhong)躍(yue)遷所(suo)發(fa)(fa)射(she)(she)的(de)(de)(de)譜(pu)線(xian)(xian)稱(cheng)(cheng)為(wei)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)發(fa)(fa)射(she)(she)線(xian)(xian),與(yu)此(ci)過程相反的(de)(de)(de)譜(pu)線(xian)(xian)稱(cheng)(cheng)為(wei)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)吸(xi)收(shou)線(xian)(xian)。元素(su)(su)(su)的(de)(de)(de)共(gong)(gong)(gong)振(zhen)(zhen)(zhen)吸(xi)收(shou)線(xian)(xian)一般有(you)好(hao)多條,其(qi)測定靈敏度也(ye)不同。在測定時,一般選(xuan)用靈敏線(xian)(xian),但當(dang)被測元素(su)(su)(su)含量較高時,也(ye)可(ke)采用次靈敏線(xian)(xian)。原(yuan)(yuan)...

  • 2021

    7-12

    原(yuan)(yuan)(yuan)子(zi)(zi)(zi)吸(xi)收光(guang)譜儀是基于(yu)試樣(yang)蒸氣相中被(bei)測(ce)(ce)元(yuan)素(su)的(de)(de)(de)基態(tai)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)對由(you)(you)光(guang)源發出的(de)(de)(de)該(gai)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)的(de)(de)(de)特(te)征性窄頻輻射(she)(she)產(chan)生共振吸(xi)收,其吸(xi)光(guang)度(du)(du)在一(yi)定(ding)范圍內與蒸氣相中被(bei)測(ce)(ce)元(yuan)素(su)的(de)(de)(de)基態(tai)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)濃度(du)(du)成正(zheng)比,以(yi)此測(ce)(ce)定(ding)試樣(yang)中該(gai)元(yuan)素(su)含量的(de)(de)(de)一(yi)種儀器分(fen)(fen)析方(fang)法(fa)。火焰(yan)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)吸(xi)收分(fen)(fen)光(guang)光(guang)度(du)(du)法(fa)測(ce)(ce)定(ding)大(da)多數金屬元(yuan)素(su)的(de)(de)(de)相對靈敏度(du)(du)為1.0×10-8~1.0×10-10g·mL-1,非火焰(yan)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)吸(xi)收分(fen)(fen)光(guang)光(guang)度(du)(du)法(fa)的(de)(de)(de)絕對靈敏度(du)(du)為1.0×10-12~1.0×10-14g。這是由(you)(you)于(yu)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)吸(xi)收分(fen)(fen)光(guang)光(guang)度(du)(du)法(fa)測(ce)(ce)定(ding)的(de)(de)(de)是占(zhan)原(yuan)(yuan)(yuan)子(zi)(zi)(zi)總數99%以(yi)上(shang)的(de)(de)(de)基態(tai)原(yuan)(yuan)(yuan)子(zi)(zi)(zi),而原(yuan)(yuan)(yuan)子(zi)(zi)(zi)發射(she)(she)光(guang)譜測(ce)(ce)定(ding)的(de)(de)(de)是占(zhan)原(yuan)(yuan)(yuan)...

  • 2021

    6-10

    戴安離(li)(li)(li)子(zi)(zi)色譜儀(yi)分(fen)(fen)離(li)(li)(li)的(de)(de)原理(li)是基于(yu)離(li)(li)(li)子(zi)(zi)交(jiao)換(huan)樹(shu)(shu)脂(zhi)上(shang)可(ke)離(li)(li)(li)解(jie)的(de)(de)離(li)(li)(li)子(zi)(zi)與流動相中(zhong)(zhong)具有相同電荷的(de)(de)溶質離(li)(li)(li)子(zi)(zi)之(zhi)間進行(xing)的(de)(de)可(ke)逆交(jiao)換(huan)和分(fen)(fen)析物(wu)溶質對交(jiao)換(huan)劑親和力的(de)(de)差別而被(bei)分(fen)(fen)離(li)(li)(li)。適(shi)用于(yu)親水性陰、陽離(li)(li)(li)子(zi)(zi)的(de)(de)分(fen)(fen)離(li)(li)(li)。例(li)如幾個陰離(li)(li)(li)子(zi)(zi)的(de)(de)分(fen)(fen)離(li)(li)(li),樣(yang)品(pin)溶液(ye)進樣(yang)之(zhi)后,首先與分(fen)(fen)析柱(zhu)的(de)(de)離(li)(li)(li)子(zi)(zi)交(jiao)換(huan)位置之(zhi)間直接進行(xing)離(li)(li)(li)子(zi)(zi)交(jiao)換(huan)(即(ji)被(bei)保留(liu)在(zai)柱(zhu)上(shang)),如用NaOH作淋洗(xi)液(ye)分(fen)(fen)析樣(yang)品(pin)中(zhong)(zhong)的(de)(de)F-、Cl-和SO42-,保留(liu)在(zai)柱(zhu)上(shang)的(de)(de)陰離(li)(li)(li)子(zi)(zi)即(ji)被(bei)淋洗(xi)液(ye)中(zhong)(zhong)的(de)(de)OH-基置換(huan)并從(cong)柱(zhu)上(shang)被(bei)洗(xi)脫(tuo)。對樹(shu)(shu)脂(zhi)親和力弱的(de)(de)分(fen)(fen)析物(wu)離(li)(li)(li)子(zi)(zi)先于(yu)對樹(shu)(shu)脂(zhi)親和力強(qiang)的(de)(de)分(fen)(fen)析物(wu)離(li)(li)(li)子(zi)(zi)依次(ci)被(bei)洗(xi)脫(tuo),這就是離(li)(li)(li)子(zi)(zi)...

  • 2021

    5-13

    智能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)滴(di)定(ding)儀是通過(guo)測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)變(bian)化(hua),來測量離(li)子濃度。首先選用適(shi)當的(de)(de)(de)指(zhi)(zhi)示電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)和參比電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji),與被(bei)測溶液組成(cheng)一個工作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池,然后加(jia)入滴(di)定(ding)劑。在滴(di)定(ding)過(guo)程中,由于發生(sheng)化(hua)學反應,被(bei)測離(li)子的(de)(de)(de)濃度不斷發生(sheng)變(bian)化(hua),因(yin)而(er)指(zhi)(zhi)示電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)隨之變(bian)化(hua)。在滴(di)定(ding)終點(dian)附近,被(bei)測離(li)子的(de)(de)(de)濃度發生(sheng)突(tu)變(bian),引起電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)的(de)(de)(de)突(tu)躍(yue),因(yin)此根據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)的(de)(de)(de)突(tu)躍(yue)可(ke)確定(ding)滴(di)定(ding)終點(dian),并給出(chu)測定(ding)結果。和直(zhi)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)法(fa)相比,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)滴(di)定(ding)法(fa)不需要準確的(de)(de)(de)測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)值,因(yin)此,溫度、液體(ti)接界電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)的(de)(de)(de)影響并不重要,其準確度優于直(zhi)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)法(fa)。智能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)(wei)(wei)滴(di)定(ding)儀的(de)(de)(de)性(xing)能(neng)(neng)特點(dian)都...

  • 2021

    4-13

    戴安(an)離子色(se)(se)(se)譜(pu)儀是高(gao)效(xiao)(xiao)液(ye)相色(se)(se)(se)譜(pu)的一(yi)種,故又稱(cheng)高(gao)效(xiao)(xiao)離子色(se)(se)(se)譜(pu)(HPIC)或現代離子色(se)(se)(se)譜(pu),其有別于傳統(tong)離子交換(huan)色(se)(se)(se)譜(pu)柱(zhu)色(se)(se)(se)譜(pu)的主(zhu)要(yao)是樹(shu)脂(zhi)具有很高(gao)的交聯度(du)和較低的交換(huan)容量(liang),進樣體(ti)積很小(xiao),用(yong)柱(zhu)塞泵輸(shu)送淋(lin)洗液(ye)通常對淋(lin)出液(ye)進行在線自動連(lian)續(xu)電導(dao)檢測(ce)。戴安(an)離子色(se)(se)(se)譜(pu)儀的正確使(shi)用(yong)方法如下:1,配置溶液(ye)a,流動相儲備液(ye)配制:(陰離子淋(lin)洗液(ye))準(zhun)確稱(cheng)取(qu)12.7188g基(ji)準(zhun)Na2CO3固體(ti)粉末并準(zhun)確定容到(dao)500ml容量(liang)瓶里,使(shi)*溶解后經沙芯抽(chou)濾(lv)裝置抽(chou)濾(lv),轉移到(dao)聚丙(bing)烯瓶中,即得到(dao)0.24mol/L的Na2CO3流...

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