三用紫外可見分光光度計(jì)代理服務(wù)為先上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="紫外可見分光光度計(jì)的比色皿的洗滌方法1分光光度法中比色皿潔凈與否是影響測定準(zhǔn)確度的因素之一。因此，必須重視選擇正確的洗凈方法。俺的經(jīng)驗(yàn)是：要是你測定溶液是酸，如果不干凈，就用弱堿溶液洗，要是你測定溶液是堿，如果不干凈，就用弱酸溶液洗，要是你"><meta name="keywords" content="三用紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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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="mbyv8bi" 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="p8rif2e" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>三用紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-09 00:30:20</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="t4h2x8o" 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(jī): </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="hj3szd8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ktgctk7" class="box"><p><p> 紫外可見分光光度計(jì)的比色皿的洗滌方法 </p> <p> 1分光光度法中比色皿潔凈與否是影響測定準(zhǔn)確度的因素之一。因此，必須重視選擇正確的洗凈方法。 </p> <p> 俺的經(jīng)驗(yàn)是：要是你測定溶液是酸，如果不干凈，就用弱堿溶液洗，要是你測定溶液是堿，如果不干凈，就用弱酸溶液洗，要是你測定溶液是有機(jī)物質(zhì)，如果不干凈，就用有機(jī)溶劑，比如酒精等溶液洗。 </p> <p> 2選擇比色皿洗滌液的原則是去污效果好，不損壞比色皿，同時又不影響測定。 </p> <p> 2.1分析常用的鉻酸洗液不宜用于洗滌比色皿，這是因?yàn)閹谋壬笤谠撓匆褐杏袝r會局部發(fā)熱，致使比色皿膠接面裂開而損壞。同時經(jīng)洗液洗滌后的比色皿還很可能殘存微量鉻，其在紫外區(qū)有吸收，因此會影響鉻及其他有關(guān)元素的測定。 </p> <p> 一般主張使用硝酸和過氧化氫(5：1)的混合溶液泡洗，三用紫外可見分光光度計(jì)代理，然后用水沖洗干凈。對一般方法難以洗凈的比色皿，還可以采取以下兩種方法。 </p> <p> 2.2先將比色皿侵入含有少量陰離子表面活性劑的碳酸鈉(20克/升)溶液泡洗，三用紫外可見分光光度計(jì)代理，三用紫外可見分光光度計(jì)代理，經(jīng)水沖洗后，再于過氧化氫和硝酸(5：1)混合溶液中侵泡半小時。紫外可見光的范圍內(nèi)，對于一個特定的波長，吸收的程度正比于試樣中該成分的濃度，可以進(jìn)行定性分析。三用紫外可見分光光度計(jì)代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><p> 紫外可見分光光度計(jì)的特點(diǎn)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(shí)驗(yàn)室都離不開紫外可見分光光度計(jì)。分光光度法具有以下主要特點(diǎn)。 </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(jìn)展，使得對元素測定的靈敏度有所推進(jìn)，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(jìn)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(zhǔn)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(jìn)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(jī)物和有機(jī)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%。低端紫外可見分光光度計(jì)銷售廠家紫外—可見分光光度計(jì)根據(jù)測定波長的范圍可分為可見分光光度定量分析法和紫外分光光度計(jì)定量分析法。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p style="text-indent:25px">使用紫外可見分光光度計(jì)進(jìn)行定量和定性分析需注意以下一些問題：1吸光度讀數(shù)范圍：吸光度測量誤差在透過率過大或過小時都會變大，為了滿足定量分析的誤差要求（<5%），在定量分析時要求吸光度應(yīng)在一定的范圍內(nèi)，這個范圍的具體值與儀器性能有關(guān)，主要是與紫外可見分光光度計(jì)檢測系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實(shí)驗(yàn)中吸光度過大的樣品可通過稀釋樣品使吸光度到所需范圍內(nèi)。如果樣品不能稀釋，可以改用光程較小的比色皿減小吸光度。吸光度過小的樣品可使用光程較大的比色皿以增大吸光度。</p><p> 紫外可見分光光度計(jì)之比色皿的選擇與使用小技巧 </p> <p> 一直以來都認(rèn)為比色皿洗滌不干凈會造成很大實(shí)驗(yàn)誤差，才發(fā)現(xiàn)原來比色皿選擇不當(dāng)也能造成不可預(yù)測的誤差。在此，就小結(jié)下有關(guān)如何正確選擇比色皿、比色皿使用注意事項(xiàng)以及比色皿的洗滌方法。 </p> <p> 比色皿透光面是由能夠透過所使用的波長范圍的光的材料制成。在200-350nm工作的比色皿適用于紫外區(qū),必須使用石英或熔熔硅石制成透光面的石英比色皿。(注：熔熔硅石的還真沒見過，只用過石英的)石英比色皿既可用于紫外區(qū)又可用于可見區(qū)，但是價(jià)格一般比較貴，所以要根據(jù)使用波長選擇比色皿，如果不用紫外區(qū)的話，用普通玻璃比色皿就行了，一則浪費(fèi)沒必要，二則，嘿嘿，摔碎了也不心疼，哈哈。而普通硅酸鹽光學(xué)玻璃制成的透光面的比色皿,只能用于350nm至1000nm的可見區(qū)。自從60年前紫外分光光度計(jì)出現(xiàn)在實(shí)驗(yàn)室的工作臺之后，已經(jīng)形成了一種能解決大多數(shù)難題的儀器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 光柵實(shí)現(xiàn)上就是一系列等寬、等距離的平行狹縫，它是利用光的衍射與干涉作用制成的。光柵作為色散元件具有不少獨(dú)特的優(yōu)點(diǎn)，光柵單色器的分辨率比棱鏡單色器的分辨率高，可精確到0.2nm，而且可用的波長范圍也比棱鏡單色器的范圍寬。所以，目前生產(chǎn)的紫外可見分光光度計(jì)大多采用光柵作為色散元件。 </p> <p> 吸收池是用于盛裝待測液并決定待測溶液透光液層厚度的器皿，又稱比色皿。吸收池一般為長方體，也有圓形或其它形狀的。其底及兩側(cè)為毛玻璃，另兩面為光學(xué)透光面。根據(jù)光學(xué)透光面的材質(zhì)，吸收池又可分為玻璃吸收池和石英吸收池兩種。玻璃吸收池用于可見光區(qū)測定，石英吸收池用于紫外光區(qū)的測定。吸收池的規(guī)格以光程為標(biāo)志。常用的吸收池規(guī)格有0.5cm、1.0cm、2.0cm、3.0cm、5.0cm等。紫外光分光光度計(jì)分為單光束和雙光束兩類。單光束型主要是依賴單束光進(jìn)行測量。暗箱紫外可見分光光度計(jì)設(shè)備</p><p style="text-indent:25px">按所吸收光的波長區(qū)域不同，分為紫外分光光度法和可見分光光度法，合稱為紫外-可見分光光度法。三用紫外可見分光光度計(jì)代理</p><p> 當(dāng)你什么都不了解的情況下，只選貴的，準(zhǔn)沒錯。在某種程度上，這句話具有一定的適用性。但是，新型儀器一般價(jià)格較貴，如果過度放寬儀器預(yù)算，而追加經(jīng)費(fèi)采購不需要的配件也是一種浪費(fèi)。如何快速簡單的掌握紫外可見分光光度計(jì)的特性，從而進(jìn)行合適的采購定位，小編將所需要的知識點(diǎn)總結(jié)如下。 </p> <p> 認(rèn)識紫外可見光分光光度計(jì)使用范圍。任何一臺儀器都不是解決所有問題的同一把鑰匙。多問自己幾個問題：需要一臺什么樣的儀器，要用它來做什么，分析的樣品的形態(tài)、所需要的測試范圍以及精度要求在哪里等等。理清楚這些，儀器的基本輪廓就畫出來了。 </p> <p> 紫外可見光分光光度計(jì)作為一種常規(guī)的實(shí)驗(yàn)室分析儀器，可以常用于無機(jī)物、有機(jī)物的定性定量分析，所使用的科研領(lǐng)域包括：科研、制藥、化工、環(huán)保、衛(wèi)生等需要分析的關(guān)鍵領(lǐng)域。三用紫外可見分光光度計(jì)代理</p><p style="text-indent:25px">上海儀電分析儀器有限公司主要經(jīng)營范圍是儀器儀表，擁有一支專業(yè)技術(shù)團(tuán)隊(duì)和良好的市場口碑。公司業(yè)務(wù)分為分光光度計(jì)，氣相色譜，原子吸收，食品安全等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批獨(dú)立的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。儀電分析秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營理念，全力打造公司的重點(diǎn)競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1905075.html</p></div></div></div></div></div><div id="r2keq2g" class="page-right twoColRt"><div id="hrd2eyk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="apm8npw" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 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