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href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="3atkbst" class="twoCol"><div id="2g8ghyk" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a 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(jì)</a>?學(xué)校紫外可見分光光度計(jì)選擇誠信互利上海儀電分析儀器供應(yīng)</p><div id="wyzv2js" class="leftbox clearfix"><h1>學(xué)校紫外可見分光光度計(jì)選擇誠信互利上海儀電分析儀器供應(yīng)</h1><div id="8y9q8ky" class="proBig"><div id="h8zqhij" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bbcsyug" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="psopg7s" 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>學(xué)校紫外可見分光光度計(jì)選擇,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-10 06:20:42</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="yq7zpqh" 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="p87f237" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="7d9bcyp" class="box"><p><p style="text-indent:25px">關(guān)于波長準(zhǔn)確度的檢查與校正日常在使用分光光度計(jì)時(shí)，是否要經(jīng)常進(jìn)行儀器波長準(zhǔn)確度的檢查?答案是否定的。當(dāng)在日常測定中發(fā)現(xiàn)儀器測定靈敏度下降，這時(shí)才應(yīng)進(jìn)行波長準(zhǔn)確度的檢查，簡易的檢查方法(粗檢)是：儀器開機(jī)后，調(diào)節(jié)波長為580nm，在吸收池座的通光道中插入一張白色卡片紙，若能觀察到一長方形的黃色光斑，說明波長準(zhǔn)確度屬正常范圍，學(xué)校紫外可見分光光度計(jì)選擇，否則就應(yīng)進(jìn)行波長校正。當(dāng)儀器經(jīng)過長途搬運(yùn)，學(xué)校紫外可見分光光度計(jì)選擇、受過機(jī)械振動(dòng)或更換光源燈泡后，必須進(jìn)行波長準(zhǔn)確度的檢查與校正，學(xué)校紫外可見分光光度計(jì)選擇。粗檢同上，其校正方法有：干涉濾光片或鐠釹濾光片校正法、利用氘燈的特征發(fā)射線校正法。具體步驟可參考儀器使用說明書。紫外可見分光光度計(jì)是實(shí)驗(yàn)室中出鏡率相當(dāng)高的分析儀器。學(xué)校紫外可見分光光度計(jì)選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="學(xué)校紫外可見分光光度計(jì)選擇,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.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(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%。專業(yè)紫外可見分光光度計(jì)賣價(jià)在水質(zhì)的常規(guī)監(jiān)測中，紫外可見分光光度法占有較大的比重，待測物的濃度和干擾物的濃度差別很大。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="學(xué)校紫外可見分光光度計(jì)選擇,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> 紫外-可見分光光度計(jì)（UV）引用新型技術(shù)，其功能強(qiáng)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(bǔ)給水等。 </p> <p> 在水和廢水監(jiān)測中的應(yīng)用，對于一個(gè)水系的監(jiān)測分析和綜合評(píng)價(jià)，一般包括水相（溶液本身）、固相（懸浮物、底質(zhì)）、生物相（水生生物）。在水質(zhì)的常規(guī)監(jiān)測中，紫外可見分光光度法占有較大的比重。由于水和廢水的成分復(fù)雜多變，待測物的濃度和干擾物的濃度差別很大，在具體分析時(shí)必須選擇好分析方法。 </p> <p> 在農(nóng)產(chǎn)品和食品分析中可用于檢測的組分或成分有蛋白質(zhì)、賴氨酸、葡萄糖、維生素C、硝酸鹽、亞硝酸鹽、砷、汞等; </p> <p> 在植物生化分析中可用于檢測葉綠素、全氮和酶的活力等； </p> <p> 在飼料分析中可用于檢測煙酸、棉酚、磷化氫和甲酯等。原理紫外可見吸收光譜主要產(chǎn)生于分子價(jià)電子在能級(jí)間的躍遷。利用一定頻率的紫外--可見光照射被分析的物質(zhì)，引起分子中價(jià)電子的躍遷，它將有選擇地被吸收。吸收光譜可以反映出物質(zhì)的特征。它對物質(zhì)進(jìn)行定性分析、定量分析及結(jié)構(gòu)分析,所依據(jù)的光譜是分子或離子吸收入射光中特定波長的光而產(chǎn)生的吸收光譜。 </p><p style="text-indent:25px"><p>綜合評(píng)價(jià)紫外可見光分光光度計(jì)儀器：根據(jù)使用領(lǐng)域進(jìn)行初步篩選，科研、制藥領(lǐng)域注重選擇光譜可調(diào)的紫外可見光分光光度計(jì)。其中，制藥中藥檢儀器要符合藥典規(guī)定，光譜帶寬要求為2nm以下。<p>重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，噪聲，波長的準(zhǔn)確度和重復(fù)性是幾個(gè)重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，需要綜合考量選購目標(biāo)紫外可見光分光光度計(jì)。<p>使用前，閱讀儀器使用說明書和做好儀器使用前的工程師培訓(xùn)。使用過程中，正確操作、認(rèn)真了解儀器指標(biāo)的物理意義和測試方法以及結(jié)合儀器使用中的相關(guān)設(shè)備的調(diào)試。掌握儀器的基本保養(yǎng)維護(hù)知識(shí)，建立相關(guān)指標(biāo)與分析測試結(jié)果之間的誤差影響條件，經(jīng)常檢測和調(diào)試儀器，確保儀器處在合適的工作狀態(tài)。初次使用紫外可見分光光度計(jì)的人員，一般來說，一定要詳細(xì)閱讀儀器安全操作手冊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="學(xué)校紫外可見分光光度計(jì)選擇,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 使用紫外分光光度計(jì)的過程中，經(jīng)常會(huì)遇到儀器因光源達(dá)不到要求，需要進(jìn)行調(diào)修。要求光源燈處不能有空氣流動(dòng)，因?yàn)閱喂馐鴥x器很忌諱空氣快速流動(dòng)而使光源燈的色溫發(fā)生變化。如遇電壓正常而鎢燈不亮?xí)r，就需要更換鎢燈。更換時(shí)，不要用手直接接觸燈泡表面，如果手指摸過，應(yīng)用無水乙醇和C4H10O混合液擦拭干凈，否則通電后指印遇熱不能去除。安裝光源燈后要注意調(diào)整光路。光源燈有兩個(gè)引線頭，安裝時(shí)用導(dǎo)線焊接，主要是防止接觸不良而造成的光源發(fā)光不穩(wěn)現(xiàn)象。在焊接時(shí)防止焊點(diǎn)與燈頭銅皮碰上，裝上燈座使電源短路。燈絲要求平直，如果燈絲彎曲，會(huì)影響光能量。燈絲的位置要與入射狹縫平行并對準(zhǔn)，上、下、左、右調(diào)節(jié)后緊固螺釘。擰緊燈座的螺紋套，可用鉗子擰緊，一般燈頭盡量往燈座里塞，因?yàn)槎鄶?shù)燈絲離燈頭偏高。調(diào)整燈位置的前后可移動(dòng)整個(gè)燈座架，它下面有三個(gè)固定螺釘，先稍松后，移動(dòng)前后位置再固定。一般調(diào)節(jié)鎢燈的位置時(shí)，將波長調(diào)到580nm處，狹縫調(diào)到MAX，把一張白紙置于比色皿盒邊出口處，觀察白紙上的光斑。若光斑上方左右角均不完整成半圓弧，可能是光源燈高度不對；光斑左邊或右邊不完整，可調(diào)光源燈底座位置。調(diào)整至白紙上可見明亮、均勻的長方形黃橙色光斑。分光光度計(jì)是杜包斯克(Duboscq)和奈斯勒(Nessler)等人在1854年將朗伯-比爾定律應(yīng)用于定量分析化學(xué)領(lǐng)域。專業(yè)紫外可見分光光度計(jì)賣價(jià)</p><p style="text-indent:25px">例如測試紫外區(qū)時(shí)則可關(guān)閉紫外分光光度計(jì)鎢燈；反之關(guān)閉氘燈。這樣就延長了那只不使用的光源燈的壽命。學(xué)校紫外可見分光光度計(jì)選擇</p><p> 紫外分光光度法是根據(jù)物質(zhì)的吸收光譜，來研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。紫外分光光度計(jì)可以在紫外可見光區(qū)任意選擇不同波長的光。物質(zhì)的吸收光譜就是物質(zhì)中的分子和原子吸收了入射光中的某些特定波長的光能量，相應(yīng)地發(fā)生了分子振動(dòng)能級(jí)躍遷和電子能級(jí)躍遷的結(jié)果。 </p> <p> 環(huán)境中的塵埃和腐蝕性氣體亦可以影響機(jī)械系統(tǒng)的靈活性、降低各種限位開關(guān)、按鍵、光電偶合器的可靠性，也是造成必須學(xué)部件鋁膜銹蝕的原因之一： </p> <p> 紫外分光光度計(jì)儀器使用一定周期后，內(nèi)部會(huì)積累一定量的塵埃，由維修工程師或在工程師指導(dǎo)下定期開啟儀器外罩對內(nèi)部進(jìn)行除塵工作： </p> <p> 將各發(fā)熱元件的散熱器重新緊固，對光學(xué)盒的密封窗口進(jìn)行清潔，必要時(shí)對光路進(jìn)行校準(zhǔn)，對機(jī)械部分進(jìn)行清潔和必要的潤滑。恢復(fù)原狀，再進(jìn)行一些必要的檢測、調(diào)校與記錄。分析儀器工作者要懂得儀器的日常維護(hù)和對主要技術(shù)指標(biāo)的簡易測試方法，自己經(jīng)常對儀器進(jìn)行維護(hù)和測試，以保證儀器工作在良好狀態(tài)。學(xué)校紫外可見分光光度計(jì)選擇</p><p style="text-indent:25px">上海儀電分析儀器有限公司總部位于徐塘路88號(hào)7幢4層、9幢，是一家儀器儀表、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(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】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(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)。【依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】的公司。儀電分析擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團(tuán)隊(duì)，以高度的專注和執(zhí)著為客戶提供分光光度計(jì)，氣相色譜，原子吸收，食品安全。儀電分析不斷開拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺(tái)，以應(yīng)用為重點(diǎn)，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價(jià)值，提供更優(yōu)服務(wù)。儀電分析始終關(guān)注儀器儀表市場，以敏銳的市場洞察力，實(shí)現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1927901.html</p></div></div></div></div></div><div id="kplc8ij" class="page-right twoColRt"><div id="b7cd28u" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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