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href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/second-yiqiyibiao_gxyq/">光學(xué)儀器</a>?<a href="http://www.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計</a>?化工紫外可見分光光度計排行鑄造輝煌上海儀電分析儀器供應(yīng)</p><div id="qfzldxt" class="leftbox clearfix"><h1>化工紫外可見分光光度計排行鑄造輝煌上海儀電分析儀器供應(yīng)</h1><div id="od88vk7" class="proBig"><div id="y8ne873" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8kwyah4" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="sb9cg2d" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>化工紫外可見分光光度計排行,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-04 06:24:54</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="88jls72" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海儀電分析儀器有限公司</a></p><p><span>聯(lián)系人：</span>薛馬駿</p><p><span>郵箱: </span>ydfxwx@qq.com</p><p><span>電話: </span>18001994173</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.inesa-a.com</p><p><span>手機: </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="yr9q88n" class="page-proshow02"><p class="title">詳細說明</p><div id="k2p7acb" class="box"><p><p style="text-indent:25px">紫外分光光度計檢測器是將光信號轉(zhuǎn)變?yōu)殡娦盘柕难b置。測量吸光度時，并非直接測量透過吸收池的光強度，而是將光強度轉(zhuǎn)換成電流進行測量，這種光電轉(zhuǎn)換器件稱為檢測器，又叫接受器。常用的檢測器有光電池、光電管、光電倍增管及光電二極管陣列檢測器等。光電池價格便宜，但長時間曝光，化工紫外可見分光光度計排行，會使靈敏度降低，化工紫外可見分光光度計排行。光電管的靈敏度比光電池高；光電倍增管不僅靈敏度比普通光電管高，化工紫外可見分光光度計排行，而且響應(yīng)速度快，目前中、高性能分光光度計中一般采用它作為檢測器。光電二極管陣列檢測器是紫外可見分光光度計檢測的一個重要進展。紫外可見光分光光度計是使用紫外光譜特點而設(shè)計制造的光學(xué)儀器?；ぷ贤饪梢姺止夤舛扔嬇判?/p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計排行,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><p> 紫外分光光度計--注意事項 </p> <p> 1．該儀器應(yīng)放在干燥的房間內(nèi)，使用時放置在堅固平穩(wěn)的工作臺上，室內(nèi)照明不宜太強。熱天時不能用電扇直接向儀器吹風(fēng)，防止燈泡燈絲發(fā)亮不穩(wěn)定。 </p> <p> 2．使用本儀器前，使用者應(yīng)該首先了解本儀器的結(jié)構(gòu)和工作原理，以及各個操縱旋鈕之功能。在未按通電源之前，應(yīng)該對儀器的安全性能進行檢查，電源接線應(yīng)牢固，通電也要良好，各個調(diào)節(jié)旋鈕的起始位置應(yīng)該正確，然后再按通電源開關(guān)。 </p> <p> 3．在儀器尚未接通電源時，電表指針必須于“0”刻線上，若不是這種情況，則可以用電表上的校正螺絲進行調(diào)節(jié)。環(huán)保紫外可見分光光度計代理為了選擇合適的狹縫寬度，應(yīng)以減少狹縫寬度時紫外分光光度計試樣的吸光度不再增加為準。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計排行,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 紫外可見分光光度計的特點分光光度法對于分析人員來說，可以說是常用和有效的工具之一。幾乎每一個分析實驗室都離不開紫外可見分光光度計。分光光度法具有以下主要特點。 </p> <p> 1靈敏度高 </p> <p> 由于新的顯色劑的大量合成，并在應(yīng)用研究方面取得了可喜的進展，使得對元素測定的靈敏度有所推進，特別是有關(guān)多元絡(luò)合物和各種表面活性劑的應(yīng)用研究，使許多元素的摩爾吸光系數(shù)由原來的幾萬提高到數(shù)十萬。 </p> <p> 2選擇性好 </p> <p> 目前已有些元素只要利用控制適當?shù)娘@色條件就可直接進行光度法測定，如鈷、鈾、鎳、銅、銀、鐵等元素的測定，已有比較滿意的方法了。 </p> <p> 3準確度高 </p> <p> 對于一般的分光光度法，其濃度測量的相對誤差在1～3%范圍內(nèi)，如采用示差分光光度法進行測量，則誤差可減少到0.X%。 </p> <p> 4適用濃度范圍廣 </p> <p> 可從常量(1%～50%)(尤其使用示差法)到痕量(10-8～10-6%)(經(jīng)預(yù)富集后)。 </p> <p> 5分析成本低、操作簡便、快速、應(yīng)用廣 </p> <p> 由于各種各樣的無機物和有機物在紫外可見區(qū)都有吸收，因此均可借此法加以測定。到目前為止，幾乎化學(xué)元素周期表上的所有元素(除少數(shù)放射性元素和惰性元素之外)均可采用此法。在國際上發(fā)表的有關(guān)分析的論文總數(shù)中，光度法約占28%，我國約占所發(fā)表論文總數(shù)的33%。 </p><p> 紫外可見分光光度計種類及優(yōu)缺點對比 </p> <p> <br /> </p> <p> 單光束UV：傳統(tǒng)的紫外，單光源發(fā)射單光束，全程密閉，通過光柵，照射樣品，由光電倍增管監(jiān)測器檢測。 </p> <p> 缺點：測完空白再測試樣品，全波段分析時間較長（一般2min）。2比例雙光束UV：單光源單光束，全程密閉，通過光柵，加入棱鏡，把光分為兩束，分別照射樣品與空白，再合并光，進入光電倍增管檢測器，通過差減法計算結(jié)果。 </p> <p> 好處：空白樣品同時檢測。 </p> <p> 缺點：靈敏度下降，全波段分析時間較長。3雙光束UV：單光源單光束，全程密閉，通過棱鏡分出兩道光，分別通過一光柵，分別進入各自的光點倍增管檢測器。 </p> <p> 好處：加強靈敏度，同時測量空白與樣品。 </p> <p> 缺點：全波段分析時間較長。4全波段UV：單光源單光束，樣品與空白暴露在空氣中，照射樣品，開始進入密閉箱，通過光柵，進入DAD檢測器。 </p> <p> 好處：空白只需要檢測一次，如果你愿意一輩子檢測這一次都可以。檢測樣品不密閉，外界光線對其無影響，使用方便且精確。分析任何波段或全波段不到1s。 </p> <p> 缺點：貴。（25W）在大部分的樣品類型中，分光光度計可接受樣品孔、小玻璃管cuvette、吸漿管和微孔板。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計排行,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div>紫外可見分光光度計使用中常見問題解析 <p> 在一般分光光度計的使用說明書上，要求儀器預(yù)熱時間約20分鐘；若是帶微處理器的分光光度計，開機后儀器自動進入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計預(yù)熱這個環(huán)節(jié)上，很多使用者或多或少存在問題，如開機只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長、打開吸收池暗箱蓋預(yù)熱等)或認為初始化過程就是預(yù)熱等等。對帶微處理器有自檢功能的分光光度計，開機后儀器自檢(初始化)結(jié)束后，在測定窗口上，設(shè)置所需波長值，用一個吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當儀器顯示讀數(shù)不再變化后即可進行測定。 </p> <p> 對于紫外可見分光光度計，由于有雙光源(鎢燈與氘燈)，為了延長燈的使用壽命，開機自檢完成后可以關(guān)掉測定時不用的光源燈。實驗室研究人員希望省錢購入專門儀器定量核酸、蛋白或者細菌的生長情況。專業(yè)紫外可見分光光度計單價</p><p style="text-indent:25px">紫外光分光光度計分為單光束和雙光束兩類。單光束型主要是依賴單束光進行測量?；ぷ贤饪梢姺止夤舛扔嬇判?/p><p> 紫外可見分光光度計的軟件功能可以極大地提升儀器的使用性能和價值，現(xiàn)代分光光度計生產(chǎn)廠商都非常重視儀器配套軟件的開發(fā)。除了儀器控制軟件和通用數(shù)據(jù)分析處理軟件外，很多儀器針對不同行業(yè)應(yīng)用開發(fā)了**分析軟件，給儀器使用者帶來了極大的便利。 </p> <p> 紫外可見分光光度計的結(jié)構(gòu)一般地，紫外可見分光光度計主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測系統(tǒng)組成，如圖1所示。光源發(fā)出的復(fù)合光通過單色器被分解成單色光，當單色光通過樣品室時，一部分被樣品吸收，其余未被吸收的光到達檢測器，被轉(zhuǎn)變?yōu)殡娦盘?，?jīng)電子電路的放大和數(shù)據(jù)處理后，通過顯示系統(tǒng)給出測量結(jié)果。化工紫外可見分光光度計排行</p><p style="text-indent:25px">上海儀電分析儀器有限公司辦公設(shè)施齊全，辦公環(huán)境優(yōu)越，為員工打造良好的辦公環(huán)境。專業(yè)的團隊大多數(shù)員工都有多年工作經(jīng)驗，熟悉行業(yè)專業(yè)知識技能，致力于發(fā)展儀電分析,上分的品牌。我公司擁有強大的技術(shù)實力，多年來一直專注于儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)?！疽婪毥?jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)?！疽婪毥?jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】的發(fā)展和創(chuàng)新，打造高指標產(chǎn)品和服務(wù)。上海儀電分析儀器有限公司主營業(yè)務(wù)涵蓋分光光度計，氣相色譜，原子吸收，食品安全，堅持“質(zhì)量保證、良好服務(wù)、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1842734.html</p></div></div></div></div></div><div id="h8ryauy" class="page-right 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