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clearfix"><h1>元素紫外可見分光光度計(jì)報(bào)價(jià) 服務(wù)為先上海儀電分析儀器供應(yīng)</h1><div id="drpdj5x" class="proBig"><div id="rdbptx3" 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="vz3v5dr" 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="bh5bnhv" 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>元素紫外可見分光光度計(jì)報(bào)價(jià),紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-25 17:45:22</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="lbfth55" 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(hào)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="vbfr3zf" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="hfb5zrl" class="box"><p><p> 紫外分光光度計(jì)--注意事項(xiàng) </p> <p> 1．該儀器應(yīng)放在干燥的房間內(nèi)，元素紫外可見分光光度計(jì)報(bào)價(jià)，使用時(shí)放置在堅(jiān)固平穩(wěn)的工作臺(tái)上，室內(nèi)照明不宜太強(qiáng)。熱天時(shí)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(gè)操縱旋鈕之功能。在未按通電源之前，應(yīng)該對(duì)儀器的安全性能進(jìn)行檢查，元素紫外可見分光光度計(jì)報(bào)價(jià)，電源接線應(yīng)牢固，元素紫外可見分光光度計(jì)報(bào)價(jià)，通電也要良好，各個(gè)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(shí)，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(jìn)行調(diào)節(jié)。實(shí)驗(yàn)室選擇時(shí)需要根據(jù)自己實(shí)驗(yàn)室的需要和目的用途來(lái)考慮。元素紫外可見分光光度計(jì)報(bào)價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素紫外可見分光光度計(jì)報(bào)價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><p> 紫外可見分光光度計(jì)的特點(diǎn)分光光度法對(duì)于分析人員來(lái)說(shuō)，可以說(shuō)是常用和有效的工具之一。幾乎每一個(gè)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(duì)元素測(cè)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(lái)的幾萬(wàn)提高到數(shù)十萬(wàn)。 </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(cè)定，如鈷、鈾、鎳、銅、銀、鐵等元素的測(cè)定，已有比較滿意的方法了。 </p> <p> 3準(zhǔn)確度高 </p> <p> 對(duì)于一般的分光光度法，其濃度測(cè)量的相對(duì)誤差在1～3%范圍內(nèi)，如采用示差分光光度法進(jìn)行測(cè)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(jiǎn)便、快速、應(yīng)用廣 </p> <p> 由于各種各樣的無(wú)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(cè)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(guó)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(guó)約占所發(fā)表論文總數(shù)的33%。化工紫外可見分光光度計(jì)差價(jià)紫外-可見分光光度法是利用某些物質(zhì)的分子吸收200--800nm光譜區(qū)的輻射來(lái)進(jìn)行分析測(cè)定的方法。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素紫外可見分光光度計(jì)報(bào)價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 752N紫外可見分光光度計(jì)產(chǎn)品介紹 </p> <p> 該產(chǎn)品采用微處理機(jī)控制技術(shù)在紫外可見光譜區(qū)域內(nèi)對(duì)物質(zhì)作定性、定量分析，是常規(guī)實(shí)驗(yàn)室必備的多用途分析儀器。 </p> <p> 主要特點(diǎn)： </p> <p> ●全息閃耀光柵單色器，具有波長(zhǎng)精度高，單色性好，雜散光低等優(yōu)點(diǎn)。 </p> <p> ●全新液晶屏顯示，讀數(shù)清晰自然。 </p> <p> ●采用微機(jī)測(cè)量系統(tǒng)，T-A轉(zhuǎn)換精度高，并有自動(dòng)調(diào)0％T和調(diào)100％T，濃度因子設(shè)定、濃度直讀。 </p> <p> ●測(cè)量讀數(shù)準(zhǔn)確性高，重現(xiàn)性好和穩(wěn)定性佳。 </p> <p> ●自動(dòng)光門技術(shù)，操作便捷。 </p> <p> 選配： </p> <p> ●熱敏繪圖打印機(jī) </p> <p> ●**光譜軟件 </p> <p> ●5cm或10cm比色皿架 </p><p> 可見分光光度計(jì)是一種常規(guī)的實(shí)驗(yàn)室分析儀器?？沙Ｓ糜跓o(wú)機(jī)物、有機(jī)物的定性、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(shuō)，紫外、可見分光光度計(jì)就是一把尺子一個(gè)天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評(píng)價(jià)一臺(tái)紫外、可見分光光度計(jì)的優(yōu)劣呢? </p> <p> 要考察它的外觀。試想，一臺(tái)外型呆板、做工粗糙的儀器，怎么可能是一臺(tái)先進(jìn)的儀器呢? </p> <p> 我們探討一下會(huì)對(duì)儀器的使用有很大影響的幾個(gè)重要指標(biāo) </p> <p> <p> 1、光度準(zhǔn)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(zhǎng)的準(zhǔn)確度和重復(fù)性 </p> <p> <br /> </p> 目前市場(chǎng)上有兩類主流紫外分光光度計(jì)產(chǎn)品:掃描光柵式分光光度計(jì)和固定光柵式分光光度計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素紫外可見分光光度計(jì)報(bào)價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p> 紫外可見分光光度計(jì)是一類很重要的實(shí)驗(yàn)室分析儀器，無(wú)論在物理學(xué)、化學(xué)、生物學(xué)、醫(yī)學(xué)、材料學(xué)、環(huán)境科學(xué)等科學(xué)研究領(lǐng)域，還是在化工、醫(yī)藥、環(huán)境檢測(cè)、冶金等現(xiàn)代化生產(chǎn)與管理部門，紫外可見分光光度計(jì)都有面向廣的應(yīng)用。 </p> <p> 紫外可見分光光度計(jì)校正 </p> <p> 開機(jī)預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標(biāo)樣（沒(méi)有的自己配），關(guān)閉蓋子； </p> <p> 校0； </p> <p> 把燈光對(duì)著黑塊，把透光度調(diào)0； </p> <p> 把燈光對(duì)標(biāo)樣，將吸光度調(diào)到100%。 </p> <p> 紫外可見分光光度計(jì)使用注意事項(xiàng) </p> <p> 開機(jī)前應(yīng)先預(yù)熱15分鐘，然后開機(jī)自檢； </p> <p> 濕度要控制在75%左右，溫度在5～30度之間； </p> <p> 儀器要穩(wěn)壓電源，接地要好。并且避免陽(yáng)光直接照射。為了測(cè)量吸光值，分光光度計(jì)制造商通常使用光電倍增管（photo-multiplier tubes，PMTs）和光敏二極管。水質(zhì)紫外可見分光光度計(jì)選擇</p><p style="text-indent:25px">紫外可見分光光度計(jì)主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測(cè)系統(tǒng)組成。元素紫外可見分光光度計(jì)報(bào)價(jià)</p><p> 波長(zhǎng)小于200nm的紫外光會(huì)被空氣吸收，只能在真空中傳播，因此稱為真空紫外(VUV)。因此，普通的UV-Vis吸收光譜儀不能測(cè)量200nm以下的信號(hào)。 </p> <p> 如果要測(cè)量VUV波段光譜，需要保持光路真空，光譜儀結(jié)構(gòu)會(huì)更加復(fù)雜，也更加昂貴。 </p> <p> ①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(guò)光柵，照射樣品，由光電倍增管監(jiān)測(cè)器檢測(cè)。 </p> <p> 缺點(diǎn)：測(cè)完空白再測(cè)試樣品，全波段分析時(shí)間較長(zhǎng)（一般2min）。 </p> <p> ②比例雙光束UV：?jiǎn)喂庠磫喂馐堂荛]，通過(guò)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(jìn)入光電倍增管檢測(cè)器，通過(guò)差減法計(jì)算結(jié)果。 </p> <p> 好處：空白樣品同時(shí)檢測(cè)。 </p> <p> 缺點(diǎn)：靈敏度下降，全波段分析時(shí)間較長(zhǎng) 元素紫外可見分光光度計(jì)報(bào)價(jià)</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，是一家生產(chǎn)型的公司。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)。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競(jìng)爭(zhēng)力，努力學(xué)習(xí)行業(yè)知識(shí)，遵守行業(yè)規(guī)范，植根于儀器儀表行業(yè)的發(fā)展。在社會(huì)各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅(jiān)實(shí)有力的支持。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2140447.html</p></div></div></div></div></div><div id="xvdzp7d" class="page-right twoColRt"><div id="xljpdh3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="n5trnjn" 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) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="5jnj3jx" 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