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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="fzr8ico" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="qog9f5h" 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>教學(xué)原子吸收分光光度計(jì)單價(jià),原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-02 02:11:56</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="gl38bqh" 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="gvmlsu7" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xfh4gac" class="box"><p><p style="text-indent:25px">原子吸收分光光度法常使用哪些定量分析方法?規(guī)范曲線法：先配制相同基體的含有不同濃度待測元素的系列規(guī)范溶液，教學(xué)原子吸收分光光度計(jì)單價(jià)，在選定的實(shí)驗(yàn)條件下分別測其吸光度，教學(xué)原子吸收分光光度計(jì)單價(jià).以扣除空白值之后的吸光度為縱坐標(biāo)，規(guī)范溶液濃度為橫坐標(biāo)繪制規(guī)范曲線。在同樣操作條件下測定試樣溶液的吸光度，從規(guī)范曲線查得試樣溶液的濃度。運(yùn)用該辦法時(shí)應(yīng)留意：配制的規(guī)范溶液濃度應(yīng)在吸光度與濃度成線性的范圍內(nèi)；整個(gè)剖析過程中操作條件應(yīng)堅(jiān)持不變。另外，規(guī)范曲線法固然簡單，但必需保證規(guī)范樣品與試樣的物理性質(zhì)相同，保證不存在干擾物，教學(xué)原子吸收分光光度計(jì)單價(jià)，關(guān)于組成尚不分明的樣品不能用規(guī)范曲線法。原子吸收分光光度計(jì)實(shí)際效果理想的元素*30余個(gè)。教學(xué)原子吸收分光光度計(jì)單價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計(jì)單價(jià),原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)常見的故障解決方法：故障現(xiàn)象：噴霧器鉑金管外管壁局部被堵塞，造成靈敏度下降或重現(xiàn)性變差。產(chǎn)生原因：當(dāng)火焰分析靈敏度下降時(shí)，有些儀器操作者首先會檢查樣品的提升量，以判斷是否是噴霧器的原因，這種做法無疑是正確的。當(dāng)檢查者發(fā)現(xiàn)樣品的提升量的確是下降了后，自然而然地聯(lián)想到是噴霧器被堵塞之故，于是用儀器附帶的細(xì)通絲來清通噴霧器的內(nèi)鉑金管；可是清通后，樣品的提升量并未得到提高，至此陷入了困惑。的確、噴霧器的鉑金管被堵塞是一種常見故障，用通絲清通也往往見效。但是噴霧器另一個(gè)隱性故障往往不是鉑金管管腔被堵，而是鉑金管外壁與外襯管間的環(huán)狀出氣縫隙被壓縮空氣中的油水等物所堵塞，造成空氣流通不足或不暢，從而影響到了提升量，這點(diǎn)是許多使用者不清楚的地方。分析檢測原子吸收分光光度計(jì)儀器原子吸收分光光度計(jì)使對難溶元素的測定靈敏度還不夠理想。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計(jì)單價(jià),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)常見的故障解決方法：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)參與測試。解決方法：如果火焰燃燒頭的燃燒縫被堵塞，勢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。</p><p style="text-indent:25px">原子吸收分光光度計(jì)的基本部件：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，即火焰原子化器和電熱原子化器?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。電熱原子化器普遍應(yīng)用的是石墨爐原子化器，因而原子吸收分光光度計(jì)，就有火焰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)。前者原子化的溫度在2100℃～2400℃之間，后者在2900℃～3000℃之間。原子吸收可作為物理和物理化學(xué)的一種實(shí)驗(yàn)手段，對物質(zhì)的一些基本性能進(jìn)行測定和研究。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計(jì)單價(jià),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">原子吸收光譜儀分析中的干擾效應(yīng)：1.物理干擾：物理干擾是指試樣在轉(zhuǎn)移、蒸發(fā)和原子化過程中，由于試樣任何物理特性（如粘度、表面張力、密度等）的變化而引起的原子吸收強(qiáng)度下降的效應(yīng)。物理干擾是非選擇性干擾，對試樣各元素的影響基本是相似的。配制與被測試樣相似組成的標(biāo)準(zhǔn)樣品，是消除物理干擾較常用的方法。在不知道試樣組成或無法匹配試樣時(shí)，可采用標(biāo)準(zhǔn)加入法或稀釋法來減小和消除物理干擾。2.化學(xué)干擾：化學(xué)干擾是由于液相或氣相中被測元素的原子與干擾物質(zhì)組分之間形成熱力學(xué)更穩(wěn)定的化合物，從而影響被測元素化合物的解離及其原子化。磷酸根對鈣的干擾，硅、鈦形成難解離的氧化物、鎢、硼、希土元素等生成難解離的碳化物，從而使有關(guān)元素不能有效原子化，都是化學(xué)干擾的例子?；瘜W(xué)干擾是一種選擇性干擾。原子吸收分光光度計(jì)主要原因是未找到可產(chǎn)生銳線光譜的光源。高校原子吸收分光光度計(jì)排行</p><p style="text-indent:25px">原子吸收光譜儀分析中的干擾效應(yīng)：物理干擾。教學(xué)原子吸收分光光度計(jì)單價(jià)</p><p style="text-indent:25px">原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：⑴靈敏度高。采用火焰原子化方式，大多元素的靈敏度可達(dá)ppm級，少數(shù)元素可達(dá)ppb級，原子吸收分光度計(jì)若用高溫石墨爐原子化，其靈敏度可達(dá)10-10-10-14g，因此，原子吸收光譜法極適用于痕量金屬分析。⑵選擇性好。由于原子吸收線比原子發(fā)射線少得多，因此，本法的光譜干擾少，加之采用單元素制成的空芯陰極燈作銳線光源，光源輻射的光譜較純，對樣品溶液中被測元素的共振線波長處不易產(chǎn)生背景發(fā)射干擾。⑶操作方便、快速。原子吸收光譜分析與分光光度分析極為類似，其儀器結(jié)構(gòu)、原理也大致相同，原子吸收分光度計(jì)因此對于長期從事化學(xué)分析的人使用原子吸收儀器極為方便，火焰原子吸收分析的速度也較快。教學(xué)原子吸收分光光度計(jì)單價(jià)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3116671.html</p></div></div></div></div></div><div id="xwdxeq3" class="page-right twoColRt"><div id="maxm3zv" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="t8lceqx" 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" 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