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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>產品關鍵詞：</span>氮氣原子吸收分光光度計差價,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-25 01:11:10</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="l3smo8n" 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>網址: </span>http://www.inesa-a.com</p><p><span>手機: </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="fgrdk7l" class="page-proshow02"><p class="title">詳細說明</p><div id="apryfw3" class="box"><p><p style="text-indent:25px">原子吸收分光光度計噴口氣流通道阻塞：可取下撞擊球帽用反向氣流或水沖刷，氮氣原子吸收分光光度計差價，也可用注射器灌水沖刷。噴口內管或氣流通道被有機質、積累的灰塵或干涸的鹽類等阻塞，可取下撞擊球帽將噴口刺進加熱或發(fā)煙的硫酸－重鉻酸鉀溶液中幾秒鐘，氮氣原子吸收分光光度計差價，冷后用水沖刷（留意：不行使洗液進入霧化器內部），運用半年以上或發(fā)現(xiàn)流量削減，氮氣原子吸收分光光度計差價，也應照此處理。原子吸收分光光度計每次運用結束，用蒸餾水吸噴2～3分鐘（不行用自來水防止溶液干涸阻塞）。工作室溫不行低于10度，不然噴口的降溫效果可使溶液結冰阻塞霧化器。由于汞的多應用，對大氣中微量汞的測定曾利用原子吸收光譜原理設計了測汞儀。氮氣原子吸收分光光度計差價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計差價,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png"></div><p style="text-indent:25px">原子吸收分光光度計組成：利用待測元素的共振輻射，通過其原子蒸汽，測定其吸光度的裝置稱為原子吸收分光光度計。它有單光束，雙光束，雙波道，多波道等結構方式。其根本結構包含光源，原子化器，光學體系和檢測體系。原子吸收分光光度計首要用于痕量元素雜質的分析，具有靈敏度高及選擇性好兩大首要長處。多應用于特種氣體，金屬有機化合物，金屬醇鹽中微量元素的分析。可是測定每種元素均需求相應的空心陰燈，這對檢測工作帶來不便。全自動原子吸收分光光度計生產廠家原子吸收分光光度計由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計差價,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">原子吸收分光光度計內標法是在試樣各含量不同的一系列規(guī)范試樣中，分別參加固定量的純物質，即內標物。在規(guī)范條件下測定剖析元素和內標元素的吸光度比，以此比值對濃度作圖，制作規(guī)范曲線，在同樣條件下，測定試樣中被測元素和內標元素的吸光度比值，在從規(guī)范曲線上讀取對應的濃度。長處：可以減少試驗條件按變化引起的隨機誤差，進步精細度。缺乏：需要使用雙通道原子吸收光譜儀，使用上受到限制。剖析速度快，可多元素和常量、微量元素一起進行剖析。一般的發(fā)射光譜剖析法不適用于測定樣品中含量高的元素，假如通過辦法研究滿意了準確測定高含量元素的要求，則常不能滿意微量元素的需要。采用電感耦合等離子體發(fā)射光譜剖析辦法成功地處理了這類問題。</p><p style="text-indent:25px">原子吸收分光光度計堅持血液的酸堿度和電解平衡，參與內分泌活動，促進性腺發(fā)育、生育能力及性機能和糖代謝，幫忙人體、組織把人體須的物質運送到全身，以供代謝需求。特別當某種微量元素供給短少時，可發(fā)生該種元素短少癥；當某種微量元素攝入過多，也可發(fā)生中毒。人體中微量元素具有“微量”特性，且多存在于外界環(huán)境中，所以標本的“防污染”成為分析前質量操控環(huán)節(jié)。微量元素分析儀廠家出產的微量元素分析儀就很重要，如全血鉛測定，當兒童過度觸摸鉛后，體內全血鉛濃度超支，標明或許導致神經系統(tǒng)遭受不可逆損害，致兒童智力低下121，可當該鉛成果超支是因**環(huán)節(jié)等分析前處理時發(fā)生污染所造成的，那么臨床醫(yī)師對此開具的一系列驅鉛藥物又將導致兒童體內其他需微量元素被一同“驅逐”排出，導致短少，又可引發(fā)微量元素短少性疾病。原子吸收分光光度計多應用于各種氣體，金屬有機化合物，金屬醇鹽中微量元素的分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計差價,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png"></div><p style="text-indent:25px">石墨爐原子吸收分光光度計，可以測定近50種元素。石墨爐法，進樣量少，靈敏度高，有的元素也可以分析到pg/mL級。元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽，對空心陰極燈發(fā)射的特征輻射進行選擇性吸收。在一定濃度范圍內，其吸收強度與試液中被測元素的含量成正比。其定量關系可用郎伯-比耳定律，A=-lgI/Io=-lgT=KCL，式中I為透射光強度；I0為發(fā)射光強度；T為透射比；L為光通過原子化器光程(長度)，每臺儀器的L值是固定的；C是被測樣品濃度；所以A=KC。原子吸收分光光度計測定每種元素均需要相應的空心陰極燈，這對檢測工作帶來不便。便攜原子吸收分光光度計性價比</p><p style="text-indent:25px">火焰原子吸收分光光度計缺點是：原子化效率低，靈敏度不夠高。氮氣原子吸收分光光度計差價</p><p style="text-indent:25px">原子吸收分光光度計光譜攪擾：光譜攪擾包含譜線堆疊、光譜通帶內存在非吸收線、原子化池內的直流發(fā)射、分子吸收、光散射等。當采用銳線光源和交流調制技能時，**種要素一般能夠不予考慮，首要考慮分子吸收和光散射的影響，它們是構成光譜背景的首要要素。電感耦合等離子發(fā)射光譜儀：是以射頻發(fā)生器供給的高頻能量加到感應耦合線圈上，并將等離子炬管置于該線圈中間，因而在炬管中發(fā)生高頻電磁場，用微電火花點燃，使通入炬管中的氬氣電離，發(fā)生電子和離子而導電，導電的氣體受高頻電磁場效果，構成與耦合線圈同心的渦流區(qū)，強壯的電流發(fā)生的高熱，從而構成火炬形狀的并可以自我克制的等離子體，由于高頻電流的趨膚效應及內管載氣的效果，使等離子體呈環(huán)狀結構。氮氣原子吸收分光光度計差價</p></p><br /><p>文章來源地址: 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