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id="kz72ivc" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991252020619/9480950.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="h2byqce" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991252020619/9480950.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="zaw38xx" 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>高校原子吸收分光光度計(jì)對(duì)比,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-02 05:14:51</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8xuroqs" 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="sr3tkmy" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qur8a2g" class="box"><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?，?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，高校原子吸收分光光度計(jì)對(duì)比，較好是分析化學(xué)專(zhuān)業(yè)人才，高校原子吸收分光光度計(jì)對(duì)比，如果這方面不注意，也不能使儀器盡快發(fā)揮作用，高校原子吸收分光光度計(jì)對(duì)比。第五，售后服務(wù)要有保障，如安裝、培訓(xùn)、耗材的供給等等。我國(guó)在1963年開(kāi)始對(duì)原子吸收分光光度計(jì)有一般性介紹。高校原子吸收分光光度計(jì)對(duì)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)對(duì)比,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991252020619/9480950.png"></div><p style="text-indent:25px">火焰原子吸收分光光度計(jì)，利用空氣—乙炔測(cè)定的元素可達(dá)30多種，若使用氧化亞氮—乙炔火焰，測(cè)定的元素可達(dá)70多種。但氧化亞氮—乙炔火焰安全性較差，應(yīng)用不普遍?？諝狻胰不鹧嬖游辗止夤舛确ǎ话憧蓹z測(cè)到PPm級(jí)（10－6），精密度1％左右。國(guó)產(chǎn)的火焰原子吸收分光光度計(jì)，都可配備各種型號(hào)的氫化物發(fā)生器（屬電加熱原子化器），利用氫化物發(fā)生器，可測(cè)定砷（As）、銻（Sb）、鍺（Ge）、碲（Te）等元素。一般靈敏度在ng／ml級(jí)（10－9），相對(duì)標(biāo)準(zhǔn)偏差2％左右。汞(Hg)可用冷原子吸收法測(cè)定。建材原子吸收分光光度計(jì)儀器原子吸收分光光度計(jì)有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)對(duì)比,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)與紫外可見(jiàn)分光光度計(jì)的區(qū)別：1、標(biāo)準(zhǔn)溶液:原子吸收分光光度計(jì)使用的標(biāo)準(zhǔn)溶液在4℃溫度下可保存較長(zhǎng)時(shí)間，放置室溫后可正常使用。紫外可見(jiàn)分光光度計(jì)樣品及標(biāo)準(zhǔn)溶液顯色穩(wěn)定后需在半小時(shí)之內(nèi)測(cè)定，且對(duì)溫度及時(shí)間要求比較苛刻。2、檢測(cè)時(shí)間:原子吸收分光光度計(jì)分析速度較快，操作簡(jiǎn)便，半個(gè)小時(shí)內(nèi)能連續(xù)測(cè)定幾十個(gè)試樣中的5、6種元素。紫外可見(jiàn)分光光度計(jì)由于有顯色過(guò)程，測(cè)量時(shí)間相對(duì)而言較長(zhǎng)，操作比較麻煩。3、應(yīng)用對(duì)象：原子吸收分光光度計(jì)針對(duì)于金屬微量元素的定量分析，火焰法：液樣含量范圍通常在0。1PPM~15PPM之間（個(gè)別元素如錫會(huì)高些）；石墨爐分析在火焰法的基礎(chǔ)上則能提高2~3個(gè)數(shù)級(jí)，即液樣含量范圍通常在0。001PPM~0。100PPM之間。紫外可見(jiàn)分光光度計(jì)分析含量范圍一般在1PPM以上，主要分析高含量的樣品。4、操作性：原子吸收分光光度計(jì)操作簡(jiǎn)單,對(duì)化驗(yàn)員要求比較低，干擾低。紫外可見(jiàn)分光光度計(jì)樣品處理極為復(fù)雜,對(duì)化驗(yàn)員要求比較高。</p><p style="text-indent:25px">原子吸收分光光度計(jì)常見(jiàn)的故障解決方法：故障現(xiàn)象：燃燒縫因生銹被腐蝕，致使汽化的樣品不能全部被原子化，降低了靈敏度。產(chǎn)生原因：液體樣品在噴霧器和撞擊球雙重作用下被汽化，結(jié)尾這些汽化的樣品集中流經(jīng)到燃燒縫處被火焰加熱到原子化狀態(tài)參與測(cè)試。解決方法：如果火焰燃燒頭的燃燒縫被堵塞，勢(shì)必造成靈敏度的下降，解決的辦法就是用稀酸清洗燃燒縫。另一個(gè)有關(guān)燃燒縫的故障是燃燒縫因生銹而被腐蝕，造成縫隙處不光潔，從而影響了靈敏度的下降。原子吸收分光光度計(jì)定量關(guān)系可用郎伯-比耳定律。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)對(duì)比,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)把有單光束和雙度光束兩種類(lèi)型如果將原子化質(zhì)器當(dāng)作分光光度計(jì)的比色皿，其儀器的構(gòu)造到與分光光度計(jì)比較相似。與分光光度計(jì)相比，不同點(diǎn)：(1)采用銳線(xiàn)光源；(2)單色器在火焰與檢測(cè)器之間。如果像分光光度計(jì)那樣，把單色器置于原子化器之前，火焰本身所發(fā)射的連續(xù)光譜就會(huì)直接照射在PMT上，會(huì)導(dǎo)致PMT壽命縮短，甚至不能正常工作。(3)原子化系統(tǒng)：除了光源發(fā)射的光外，還存在：a.火焰本身所發(fā)射的連續(xù)光譜；b.原子吸收中的原子發(fā)射現(xiàn)象。在原子化過(guò)程中，基態(tài)原子受到輻射躍遷到激發(fā)態(tài)后，處于不穩(wěn)定狀態(tài)，返回基態(tài)時(shí)，可能將能量又以光的形式釋放出來(lái)。故既存在原子吸收，也有原子發(fā)射。產(chǎn)生的輻射也不一定在一個(gè)方向上，但對(duì)測(cè)量仍將產(chǎn)生一定干擾?，F(xiàn)在我國(guó)已有多家企業(yè)生產(chǎn)多種型號(hào)、性能較先進(jìn)的原子吸收分光光度計(jì)。建材原子吸收分光光度計(jì)儀器</p><p style="text-indent:25px">原子吸收分光光度計(jì)的優(yōu)點(diǎn)是：原子化效率高，在可調(diào)的高溫下試樣利用率達(dá)100%，靈敏度高。高校原子吸收分光光度計(jì)對(duì)比</p><p style="text-indent:25px">原子吸收分光光度計(jì)的工作流程：以測(cè)定試液中鎂離子的含量為例，先將試液噴射成霧狀并引入到火焰中，含鎂鹽的霧滴在火焰溫度下，蒸發(fā)、離解成鎂原子形成原子蒸氣。當(dāng)用鎂的空心陰極燈作光源，它便輻射出具有波長(zhǎng)為285.2nm的鎂的特征光譜(波)，當(dāng)其通過(guò)火焰中一定厚度的鎂原子蒸氣時(shí)，部分光被蒸氣中基態(tài)鎂原子所吸收而使強(qiáng)度有所減弱。通過(guò)單色器分光后被檢測(cè)器接受，檢測(cè)器測(cè)得鎂的285.2nm譜線(xiàn)光的減弱程度，進(jìn)而即可求出試樣中鎂的含量。高校原子吸收分光光度計(jì)對(duì)比</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3121179.html</p></div></div></div></div></div><div id="lpwdf8b" class="page-right twoColRt"><div id="rwtqxjg" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="f23y7kr" 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="zovspht" 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