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class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="gqsk887" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tp2hyvm" 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>國內(nèi)**原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2020-12-25 04:14:59</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="8fbspb2" 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="yxu3gry" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8q8q2zv" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)中常用的定量辦法：規(guī)范曲線法。規(guī)范曲線法是用規(guī)范物質(zhì)制造一系列已知濃度的規(guī)范試樣，在規(guī)范條件下，測得每一濃度對應(yīng)的吸光度值，以吸光度對濃度作圖，制作規(guī)范曲線。在相同條件下測定樣品吸光度，從規(guī)范曲線上讀取樣品濃度，國內(nèi)**原子吸收分光光度計(jì)廠家。長處：適用范圍廣，快速簡便，合適大批量樣品的測定，國內(nèi)**原子吸收分光光度計(jì)廠家，國內(nèi)**原子吸收分光光度計(jì)廠家。缺乏：試驗(yàn)準(zhǔn)確度受基體干擾嚴(yán)重。規(guī)范參加法：規(guī)范參加法是在數(shù)個(gè)等分的試樣平分別參加呈比例的規(guī)范試樣，然后稀釋到一定體積。根據(jù)測定的吸光度值，制作吸光度A-c（濃度）曲線。用外推法求得稀釋后試樣中待測物的濃度。很長一段時(shí)間，原子吸收主要局限于天體物理方面的研究。國內(nèi)**原子吸收分光光度計(jì)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國內(nèi)**原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">原子吸收分析中，首先要使待測元素呈原子狀態(tài)，而原子化往往是將溶液噴霧到火焰中去實(shí)現(xiàn)，這就存在理化方面的干擾，使對難溶元素的測定靈敏度還不夠理想，因此實(shí)際效果理想的元素*30余個(gè)；由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等，操作中必須注意安全。原子吸收分光光度計(jì)一般由四大部分組成，即光源（單色銳線輻射源）、試樣原子化器、單色儀和數(shù)據(jù)處理系統(tǒng)（包括光電轉(zhuǎn)換器及相應(yīng)的檢測裝置）。原子化器主要有兩大類，即原子吸收分光光度計(jì)和電熱原子化器?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。雙光束原子吸收分光光度計(jì)差價(jià)火焰有多種火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國內(nèi)**原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991385859509/5179129.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)化學(xué)攪擾是由于液相或氣相中被測元素的原子與攪擾物質(zhì)組分之間構(gòu)成熱力學(xué)更安穩(wěn)的化合物，從而影響被測元素化合物的解離及其原子化。磷酸根對鈣的攪擾，硅、鈦構(gòu)成難解離的氧化物、鎢、硼、希土元素等生成難解離的碳化物，從而使有關(guān)元素不能有用原子化，都是化學(xué)攪擾的例子?；瘜W(xué)攪擾是一種選擇性攪擾。原子吸收分光光度計(jì)電離攪擾：在高溫下原子電離，使基態(tài)原子的濃度減少，引起原子吸收信號降低，此種攪擾稱為電離攪擾。</p><p style="text-indent:25px">原子吸收分光光度計(jì)測土壤巖石中砷銻鉍汞時(shí)常見問題的剖析：氫化物的產(chǎn)生條件與技術(shù)指標(biāo)是作業(yè)曲線是否滿足要求的條件，測驗(yàn)不同的元素應(yīng)設(shè)定不同的氫化物的產(chǎn)生條件，條件的設(shè)定符合儀器使用說明書中給定的推薦剖析條件。在測驗(yàn)規(guī)范系列時(shí)，如儀器靈敏度不符合要求，則應(yīng)加大負(fù)高壓或加大電流，從頭測定空白，然后測規(guī)范系列。別的，當(dāng)規(guī)范系列含量太低時(shí)，該儀器靈敏度達(dá)不到。規(guī)范貯備液主張購買國家規(guī)范物質(zhì)中間制造的規(guī)范溶液。在配置的過程中應(yīng)注意所用水、試劑、容器的污染問題，所用容器應(yīng)該在使用前用硝酸溶液浸泡24小時(shí)，沖凈后使用。規(guī)范溶液在長期貯備過程中也會(huì)出現(xiàn)蒸發(fā)，因而需要確保規(guī)范溶液在有效期之內(nèi)。原子吸收分光光度計(jì)存在理化方面的干擾。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國內(nèi)**原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991326259040/7441452.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)的優(yōu)點(diǎn)是：（1）檢出限低，靈敏度高?；鹧嬖游辗ǖ臋z出限可達(dá)10-9g（ppm級），石墨爐原子吸收法更高，可達(dá)ppb級。（2）丈量精度好?；鹧嬖游辗y定中等和高含量元素的相對偏差可小于0.01，丈量精度已接近于經(jīng)典化學(xué)辦法。石墨爐原子吸收法的丈量精度一般為3-5。樣品由載氣（氬）帶入霧化系統(tǒng)進(jìn)行霧化后，以氣溶膠形式進(jìn)入等離子體的軸向通道，在高溫文惰性氣氛中被充沛蒸騰、原子化、電離和激起，發(fā)射出所含元素的特征譜線。依據(jù)特征譜線的存在與否，鑒別樣品中是否含有某種元素（定性分析）；根依據(jù)特征譜線強(qiáng)度確定樣品中相應(yīng)元素的含量（定量分析）。電熱原子化器普遍應(yīng)用的是原子吸收分光光度計(jì)。學(xué)校原子吸收分光光度計(jì)怎么樣</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)。國內(nèi)**原子吸收分光光度計(jì)廠家</p><p style="text-indent:25px">原子吸收分光光度計(jì)的開展：1981年原子吸收分光光度計(jì)完成操作自動(dòng)化。1984年首臺(tái)連續(xù)氫化物發(fā)生器面世。1990年推出世界上先進(jìn)的MarkV1焰燃燒頭。1995年在線火焰自動(dòng)進(jìn)樣器（SIPS8）研制成功并投入運(yùn)用。1998年首臺(tái)快速剖析火焰原子吸收220FS誕生。2002年世界上**火焰和石墨爐同時(shí)剖析的原子吸收光譜儀出產(chǎn)并投放市場。原子吸收分光光度計(jì)怎樣用才正確？該崗位群主要是散布于冶金、環(huán)保、食物、制藥、醫(yī)療衛(wèi)生、化學(xué)、化工、農(nóng)業(yè)等領(lǐng)域，主要從事環(huán)境和產(chǎn)品中金屬物質(zhì)的檢驗(yàn)以及科學(xué)研制的質(zhì)量操控等工作。國內(nèi)**原子吸收分光光度計(jì)廠家</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。儀電分析深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的分光光度計(jì)，氣相色譜，原子吸收，食品安全。儀電分析致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對用戶產(chǎn)品上的貼心，為用戶帶來良好體驗(yàn)。儀電分析創(chuàng)始人湯志東，始終關(guān)注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務(wù)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2551826.html</p></div></div></div></div></div><div id="zt2y4eg" class="page-right twoColRt"><div id="jdkmtah" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="f78p4by" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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