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clearfix"><h1>工業(yè)紫外可見分光光度計排行來電咨詢上海儀電分析儀器供應(yīng)</h1><div id="u3mdseg" class="proBig"><div id="j3i7zmo" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ncz777m" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tiuo4nz" 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>工業(yè)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>2020-11-18 07:16:47</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="cgi3zwo" 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(dāng)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="ncjnh7x" class="page-proshow02"><p class="title">詳細說明</p><div id="8df87qs" class="box"><p><p> 可見分光光度計是一種常規(guī)的實驗室分析儀器，工業(yè)紫外可見分光光度計排行?？沙Ｓ糜跓o機物、有機物的定性，工業(yè)紫外可見分光光度計排行，工業(yè)紫外可見分光光度計排行、定量分析中，在科研、制藥、化工、環(huán)保、衛(wèi)生、防疫等領(lǐng)域中發(fā)揮重要的作用。有人說，紫外、可見分光光度計就是一把尺子一個天平，凡是有化驗、分析的地方都能用到它。那么，如何評價一臺紫外、可見分光光度計的優(yōu)劣呢? </p> <p> 要考察它的外觀。試想，一臺外型呆板、做工粗糙的儀器，怎么可能是一臺先進的儀器呢? </p> <p> 我們探討一下會對儀器的使用有很大影響的幾個重要指標 </p> <p> <p> 1、光度準確度 </p> <p> 2、雜散光 </p> <p> 3、光譜帶寬 </p> <p> 4、穩(wěn)定性 </p> <p> 5、噪聲 </p> <p> 6、波長的準確度和重復(fù)性 </p> <p> <br /> </p> 一般來說，紫外光分光光度計分為單光束和雙光束兩類。工業(yè)紫外可見分光光度計排行</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)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/ydfx123/637396592124342670/5540999.png"></div><p> 進行單波長測量時，需要考慮朗伯比爾定律對入射光單色性的要求和測定靈敏度的要求。沒有干擾時，一般選擇在吸收峰的MAX吸收波長位置處，如果有干擾，選擇在沒有干擾且吸光度變化較平緩的位置。進行多波長校正時，除盡量滿足單波長測定的波長要求外，還要求多個組分間的吸收光譜間線性無關(guān)。 </p> <p> 紫外分光光度計狹縫的大小會影響到儀器的信噪比和標準曲線的線性范圍。狹縫過大，通常會使線性范圍變小，特別是當(dāng)不在MAX吸收波長位置測定時更是如此。狹縫過小，信噪比變差，基線平直度和測量數(shù)據(jù)的重復(fù)性會變差。此外，還需要考慮樣品吸收峰寬度的影響。通常單波長測定時，一般選擇在MAX吸收波長位置，線性范圍容易滿足，可選擇較寬的狹縫（1~2nm）多波長測定時，很難同時在所有波長都滿足線性范圍要求，應(yīng)選擇比較小的狹縫。材料紫外可見分光光度計報價為了測量吸光值，分光光度計制造商通常使用光電倍增管（photo-multiplier tubes，PMTs）和光敏二極管。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)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/ydfx123/637396593980700101/5381945.png"></div><p> 我們都知道，紫外-可見分光光度計是實驗室中出鏡率相當(dāng)高的分析儀器。 </p> <p> 那么你的使用情況如何呢？ </p> <p> 你所關(guān)注紫外-可見分光光度計的哪些性能？ </p> <p> 大家都來說說吧！分光光度法是通過測定被測物質(zhì)，在特定波長處或一定波長范圍內(nèi)光的吸光度或發(fā)光強度，對該物質(zhì)進行定性和定量分析的方法。紫外-可見分光光度計是元析儀器引用新型技術(shù)，其功能強大，采用單色器技術(shù)，波長范圍190-1100nm，是各種涉及水和廢水分析領(lǐng)域的通用儀器，應(yīng)用范圍包括化工分析以及市政和工業(yè)廢水，飲用水，加工過程用水，地表水，冷卻水和鍋爐補給水等液體的分析。 </p><p> 紫外可見分光光度計條件設(shè)定 </p> <p> 在定量分析中，為了提高測定的靈敏度，入射光的波長應(yīng)選擇被測物的MAX吸收波長λmax，如果λmax有干擾，可選擇另一條靈敏度稍低、但能避免干擾的譜線，所以，適當(dāng)選擇入射光的波長，不僅能提高測定的靈敏度，還能提高測定的準確度。 </p> <p> 狹縫寬度過大，入射光的單色性差；狹縫寬度太小，入射光的強減弱。狹縫寬度過大或過小均會造成靈敏度降低，選擇是產(chǎn)生MIN誤差情下的MAX狹縫。一般選用儀器的狹縫寬琶度應(yīng)小于待測樣品吸收帶的半寬度，否則測得的吸光度值會偏低，狹縫寬度的選擇應(yīng)以減少狹縫寬度時供試品的吸光度不再；加為準，對于大部分被測品種，可以使用2nm縫寬。 </p> <p> 可通過控制被測物濃度或改變吸收池厚度來實現(xiàn)吸光度合理的范圍，以盡量減小測量誤差。一般吸光度盡量控制在0.1-0.8范圍。 </p> <p> 空白溶液是用來調(diào)節(jié)吸光度測量工作零點即A=0，T=100%的溶液，以消除溶液中其它基體組分以及吸收池和溶劑對入射光的反射和吸收所帶來的誤差。根據(jù)情況不同，常用空白溶液有如下幾種選擇。 </p> <p> <br /> 在選擇紫外可見分光光度計之前，需要了解儀器的基礎(chǔ)構(gòu)架，有哪些地方是消耗品，有想哪些需要維修保養(yǎng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)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>光源和檢測方法（LIGHTSOURCESANDDETECTION）分光光度計的光譜也是需要考慮的一個重要因素。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。例如AmershamBiosciencesofPiscataway公司的GeneQuantII能在230、260、280、320、595和600nm的波長下測量樣品。果果需要更大的靈活性，研究者可以考慮一種更高性能的寬光譜儀器，可以程序性地進行ELISAs分析和比色分析。</p><p>紫外分光光度計一般覆蓋190nm和380nm波長，通常利用氘燈照明。一些特殊的儀器可以提供滿足光子學(xué)和半導(dǎo)體研究需要的光譜范圍。VarianofPaloAlto公司的CaryDeepUV和HitachiHighTechnologiesofTokyo的U-7000AutomatedVacuumUVSystem就是這樣的儀器。</p><p>一些儀器具有多種光源供選擇：紫外光、可見光和甚至紅外光（780nm至3,000nm）。鎢燈和鹵素?zé)粢话阒桓采w可見光部分（大約380nm到800nm）。而氙燈則可以覆蓋紫外光和可見光區(qū)域。大部分單機型的分光光度計包含了驅(qū)動儀器運行和管理數(shù)據(jù)的軟件。與PC機一起聯(lián)用，需要從制造商購買軟件。學(xué)校紫外可見分光光度計差價</p><p style="text-indent:25px">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。工業(yè)紫外可見分光光度計排行</p><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(dāng)?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%。工業(yè)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位于徐塘路88號7幢4層、9幢，交通便利，環(huán)境優(yōu)美，是一家生產(chǎn)型企業(yè)。儀電分析是一家有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會”的經(jīng)營理念;“誠守信譽，持續(xù)發(fā)展”的質(zhì)量方針。公司業(yè)務(wù)涵蓋分光光度計，氣相色譜，原子吸收，食品安全，價格合理，品質(zhì)有保證，深受廣大客戶的歡迎。儀電分析將以真誠的服務(wù)、創(chuàng)新的理念、***的產(chǎn)品，為彼此贏得全新的未來！</p></p><br /><p>文章來源地址: 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