本文關(guān)鍵詞：便攜式Li-K分析儀的研制及其在鋰輝石中鋰的分析應(yīng)用　出處：《巖礦測試》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 便攜式Li-K分析儀 液體陰極輝光放電 CCD光譜儀 鋰輝石 標(biāo)準(zhǔn)加入法

【摘要】：我國鋰鉀主要礦產(chǎn)資源大多分布在西部偏遠(yuǎn)地區(qū),其勘查找礦或綜合利用迫切需要現(xiàn)場快速分析技術(shù)的支持。本文介紹了自行開發(fā)的便攜式Li-K分析儀的主要性能及其在鋰輝石中鋰的分析應(yīng)用。Li-K分析儀是一種基于大氣壓的液體陰極輝光放電光譜儀,以待測液體為放電陰極,實現(xiàn)了樣品中Li、K等元素的原子化和激發(fā)。該儀器以光纖傳導(dǎo)CCD光譜儀作為檢測器,其波長范圍為345~1015 nm,分辨率3 nm;以Li 670.78 nm和K 769.90 nm分析譜線,在儀器最佳工作條件下測定Li、K的精密度(RSD,n=14)均低于2%,檢出限為0.03μg/m L,檢測范圍0.1~10μg/m L。研究表明,不同酸度和酸的類型對譜線強度影響較大,且存在顯著的樣品基體效應(yīng),標(biāo)準(zhǔn)曲線法分析鋰輝石中Li的結(jié)果偏差高達267%;而標(biāo)準(zhǔn)加入法可克服基體效應(yīng)的影響,獲得與ICP-OES一致性較好的分析結(jié)果,為現(xiàn)場開展固體樣品中Li的測定奠定了基礎(chǔ)。
[Abstract]:The main mineral resources of lithium and potassium in China are mostly distributed in the remote areas of western China. In this paper, the main properties of the portable Li-K analyzer developed by ourselves and its application in the analysis of lithium in spodumene are introduced. The analyzer is a liquid cathodic glow discharge spectrometer based on atmospheric pressure. The atomization and excitation of Li-K and other elements in the sample were realized by using the liquid to be measured as the discharge cathode. The instrument used the optical fiber conduction CCD spectrometer as the detector and the wavelength range was 345nm 1015nm. Resolution 3 nm; Using Li 670.78 nm and K 769.90 nm to analyze the spectral lines, the precision of the determination of Liang K is less than 2% under the optimum operating conditions. The detection limit is 0.03 渭 g / mL and the detection range is 0.1 渭 g / mL. The results show that different acidity and type of acid have great influence on the spectral line strength, and there is a significant sample matrix effect. The result deviation of Li in spodumene by standard curve method is as high as 26775. The standard addition method can overcome the influence of the matrix effect and obtain the analytical results consistent with ICP-OES, which lays a foundation for the determination of Li in solid samples in the field.
【作者單位】： 國家地質(zhì)實驗測試中心;
【基金】：國土資源公益性行業(yè)科研專項(201311013)
【分類號】：P624;O657
【正文快照】： Li和K是兩種重要的金屬元素,是全國重要礦產(chǎn)潛力評價的26個礦種元素,對國民經(jīng)濟建設(shè)和國家戰(zhàn)略安全具有非常重要的意義。Li廣泛存在鹽湖鹵水、海水、地下鹵水和鋰礦中,K主要來源于鉀鹽。我國鋰礦資源豐富,礦產(chǎn)多,規(guī)模大,目前已發(fā)現(xiàn)含鋰礦物150多種,具有工業(yè)利用價值的鋰礦物主

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本文編號：1389995