食品安全原子吸收分光光度計(jì)選擇來(lái)電咨詢(xún) 上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="火焰中有兩種以上原子的吸收線(xiàn)與光源發(fā)射的剖析線(xiàn)相堆疊時(shí)產(chǎn)生臨近線(xiàn)干擾，這種干擾使結(jié)果偏高。當(dāng)剖析元素的吸收線(xiàn)和共存元素的吸收線(xiàn)完整堆疊，而剖析元素的含量比較低時(shí)，測(cè)得的只是共存元素的吸收信號(hào)。當(dāng)剖析元素的剖析線(xiàn)中心位置和共存元素的吸收線(xiàn)的中"><meta name="keywords" content="食品安全原子吸收分光光度計(jì)選擇,原子吸收分光光度計(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 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href="http://www.cdcfah.com/cp/third-fenxiyiqi_ysfxyq/">元素分析儀器</a>?食品安全原子吸收分光光度計(jì)選擇來(lái)電咨詢(xún) 上海儀電分析儀器供應(yīng)</p><div id="xrtvmt3" class="leftbox clearfix"><h1>食品安全原子吸收分光光度計(jì)選擇來(lái)電咨詢(xún) 上海儀電分析儀器供應(yīng)</h1><div id="gfh2wre" class="proBig"><div id="883q3dk" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8rwvr2c" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="hl7qp2a" 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>食品安全原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-05 06:13:11</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2kw72ls" 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(huà): </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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="kovp73v" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="2qxu8fm" class="box"><p><p style="text-indent:25px">火焰中有兩種以上原子的吸收線(xiàn)與光源發(fā)射的剖析線(xiàn)相堆疊時(shí)產(chǎn)生臨近線(xiàn)干擾，這種干擾使結(jié)果偏高。當(dāng)剖析元素的吸收線(xiàn)和共存元素的吸收線(xiàn)完整堆疊，而剖析元素的含量比較低時(shí)，測(cè)得的只是共存元素的吸收信號(hào)。當(dāng)剖析元素的剖析線(xiàn)中心位置和共存元素的吸收線(xiàn)的中心位置稍有偏離，但仍有相當(dāng)水平的堆疊，此時(shí)得于的吸收信號(hào)仍有比較大一局部是共存元素產(chǎn)生的。當(dāng)共存元素的吸收線(xiàn)和剖析元素的吸收線(xiàn)稍有堆疊時(shí)，食品安全原子吸收分光光度計(jì)選擇，吸收信號(hào)中仍有小局部是共存元素產(chǎn)生的。只要剖析元素的吸收線(xiàn)和共存元素的吸收線(xiàn)完整別離時(shí)，共存元素才不產(chǎn)生干擾。Co253.649對(duì)Hg253.652r的干擾是典型的吸收線(xiàn)堆疊干擾。供氣鋼瓶不應(yīng)放在儀器房間內(nèi)，食品安全原子吸收分光光度計(jì)選擇，食品安全原子吸收分光光度計(jì)選擇,要放在離主機(jī)近、平安、通風(fēng)良好的房間。食品安全原子吸收分光光度計(jì)選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)原子化條件：程序升溫的條件選擇:在石墨爐原子化法中，合理選擇干燥、灰化、原子化及除殘溫度與時(shí)間是十分重要的。干燥應(yīng)在稍低于溶劑沸點(diǎn)的溫度下進(jìn)行，以防止試液飛濺?；一哪康氖浅セw和局外組分，在保證被測(cè)元素沒(méi)有損失的前提下應(yīng)盡可能使用較高的灰化溫度。原子化溫度的選擇原則是，選用達(dá)到較大吸收信號(hào)的較低溫度作為原子化溫度。原子化時(shí)間的選擇，應(yīng)以保證完全原子化為準(zhǔn)。原子化階段停止通保護(hù)氣，以延長(zhǎng)自由原子在石墨爐內(nèi)的平均停留時(shí)間。除殘的目的是為了消除殘留物產(chǎn)生的記憶效應(yīng)，除殘溫度應(yīng)高于原子化溫度。雙光束原子吸收分光光度計(jì)差價(jià)原子吸收分光光度計(jì)可普遍應(yīng)用于食品、醫(yī)藥、環(huán)境、生物、農(nóng)業(yè)、石油化工、建筑、材料、地質(zhì)、科研等領(lǐng)域。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png"></div><p style="text-indent:25px">光源的作用是發(fā)射出能被待測(cè)元素吸收的特征波長(zhǎng)譜線(xiàn)，供測(cè)量用。為了保證峰值吸收的測(cè)量，要求光源必須能發(fā)射出比吸收線(xiàn)寬度更窄的銳線(xiàn)光譜，并且強(qiáng)度大而穩(wěn)定，背景低且噪聲小，使用壽命長(zhǎng)。空心陰極燈（hollowcathodelamp，HCL）、無(wú)極放電燈、蒸氣放電燈和激光光源燈都能滿(mǎn)足上述要求，其中應(yīng)用較普遍的是空心陰極燈和無(wú)極放電燈。量寶空心陰極燈又稱(chēng)元素?zé)?，根?jù)陰極材料的不同，分為單元素?zé)艉投嘣責(zé)敉ǔ＃瑔卧氐目招年帢O燈只能用于一種元素的測(cè)定，這類(lèi)燈發(fā)射線(xiàn)干擾少，強(qiáng)度高，但每測(cè)一種元素需要更換一種燈。多元素?zé)艨蛇B續(xù)測(cè)定幾種元素，減少了換燈的麻煩，但光強(qiáng)度較弱，容易產(chǎn)生干擾。目前，中國(guó)生產(chǎn)的空心陰極燈可以滿(mǎn)足國(guó)內(nèi)外各種型號(hào)的原子吸收分光光度計(jì)的要求，元素品種達(dá)60余種。</p><p style="text-indent:25px">我國(guó)原子吸收商品儀器的生產(chǎn)已有30年，目前國(guó)內(nèi)外生產(chǎn)廠(chǎng)家有十多家，幾十種型號(hào)。對(duì)此，用戶(hù)要知己知彼。首先要明確購(gòu)買(mǎi)儀器主要解決什么問(wèn)題，分析要求是什么。因?yàn)椴煌姆治鲆螅瑢?duì)儀器的功能要求會(huì)有不同的側(cè)重，而任何一臺(tái)儀器也不是全能的。其次，是要考慮適用性和經(jīng)濟(jì)性。要結(jié)合自己的經(jīng)濟(jì)實(shí)力，技術(shù)水平和人員素質(zhì)選擇能滿(mǎn)足自己工作要求的型號(hào)。第三，對(duì)新組建原子光譜實(shí)驗(yàn)室的用戶(hù)，還要注意必須有輔助設(shè)備的投入，如樣品的前處理設(shè)備的購(gòu)置，實(shí)驗(yàn)室環(huán)境條件的建設(shè)，如穩(wěn)壓電源、空調(diào)、清潔的房間以及地線(xiàn)等。有的用戶(hù)不注意這些基本條件的準(zhǔn)備，就匆匆購(gòu)買(mǎi)儀器，結(jié)果儀器購(gòu)買(mǎi)后長(zhǎng)期不能投產(chǎn)，不能發(fā)揮儀器的效益。第四，注意人才培養(yǎng)，原子吸收光譜儀屬于大型精密儀器，樣品前處理以及操作相對(duì)較為復(fù)雜，建議用戶(hù)一定配備具有中專(zhuān)以上文化水平的人，較好是分析化學(xué)專(zhuān)業(yè)人才，如果這方面不注意，也不能使儀器盡快發(fā)揮作用。第五，售后服務(wù)要有保障，如安裝、培訓(xùn)、耗材的供給等等。原子吸收分光光度計(jì)具有靈敏度高及選擇性好兩大主要優(yōu)點(diǎn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991268710095/3209448.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)原子化條件：(1)火焰類(lèi)型和特性:在火焰原子化法中，火焰類(lèi)型和特性是影響原子化效率的主要因素。對(duì)低、中溫元素，使用空氣-乙炔火焰;對(duì)高溫元素，宜采用氧化亞氮-乙炔高溫火焰;對(duì)分析線(xiàn)位于短波區(qū)(200nm以下)的元素，使用空氣-氫火焰是合適的。對(duì)于確定類(lèi)型的火焰，稍富燃的火焰(燃?xì)饬看笥诨瘜W(xué)計(jì)量)是有利的。對(duì)氧化物不十分穩(wěn)定的元素如Cu、Mg、Fe、Co、Ni等，用化學(xué)計(jì)量火焰(燃?xì)馀c助燃?xì)獾谋壤c它們之間化學(xué)反應(yīng)計(jì)量量相近)或貧燃火焰(燃?xì)饬啃∮诨瘜W(xué)計(jì)量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃?xì)馀c助燃?xì)獾谋壤?2)燃燒器的高度選擇:在火焰區(qū)內(nèi)，自由原子的空間分布是不均勻，且隨火焰條件而改變，因此，應(yīng)調(diào)節(jié)燃燒器的高度，以使來(lái)自空心陰極燈的光束從自由原子濃度較大的火焰區(qū)域通過(guò)，以期獲得高的靈敏度。原子吸收分光光度計(jì)存在理化方面的干擾。食品安全原子吸收分光光度計(jì)選擇</p><p style="text-indent:25px">原子吸收分光光度計(jì)，就有原子吸收分光光度計(jì)和帶石墨爐的原子吸收分光光度計(jì)。食品安全原子吸收分光光度計(jì)選擇</p><p style="text-indent:25px">原子吸收分光光度計(jì)的安全運(yùn)用留意事項(xiàng)：1、在運(yùn)輸過(guò)程中遭到劇烈碰擊的儀器，主機(jī)不能冒然通電。2、長(zhǎng)期在惡劣條件寄存的儀器應(yīng)該經(jīng)常維護(hù)保養(yǎng)。3、一旦儀器的報(bào)警器發(fā)出聲音,應(yīng)當(dāng)即關(guān)掉氣源，并關(guān)機(jī)。4、請(qǐng)您隨時(shí)留意，一旦發(fā)生異味，請(qǐng)當(dāng)即切斷電源，關(guān)掉乙炔鋼瓶總閥門(mén)。請(qǐng)將空壓機(jī)的空氣管插入燃?xì)夤艿乐校⑼扛姆试硭詸z查燃?xì)夤艿栏鹘宇^是否漏氣，特別應(yīng)該檢查霧化筒后部的防爆塞是否密封無(wú)缺，決不能在發(fā)生漏氣時(shí)燃燒操作，否則容易發(fā)生回火爆開(kāi)。5、每次燃燒前檢查廢液管是否打好水封；確認(rèn)水封無(wú)誤時(shí)方可開(kāi)機(jī)燃燒。6、乙炔鋼瓶放置在接近儀器室的房間內(nèi)，保持空氣流通，并應(yīng)有防火標(biāo)識(shí)。7、必定要運(yùn)用的乙炔專(zhuān)屬減壓閥，并裝有防回火設(shè)備。食品安全原子吸收分光光度計(jì)選擇</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3170075.html</p></div></div></div></div></div><div id="hr28hri" class="page-right twoColRt"><div id="l2lh7pw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="tdaceqn" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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