【摘要】：采用顯微激光誘導(dǎo)擊穿光譜技術(shù)對(duì)低合金鋼標(biāo)準(zhǔn)樣品進(jìn)行定量分析,空間分辨率達(dá)到20μm,單脈沖檢測(cè)極限(LoD)為0.10%。根據(jù)譜線強(qiáng)度和元素濃度的關(guān)系獲得Mn元素的基本定標(biāo)曲線,定標(biāo)曲線的擬合度系數(shù)R~2為0.97,采用去一交互驗(yàn)證法預(yù)測(cè)了樣品中Mn元素的濃度,七個(gè)樣品的平均預(yù)測(cè)誤差為12.91%,去一交互驗(yàn)證均方根誤差為0.11%。采用內(nèi)標(biāo)法時(shí)定標(biāo)曲線的擬合度系數(shù)R~2為0.99,七個(gè)樣品的平均預(yù)測(cè)誤差為7.25%,去一交互驗(yàn)證均方根誤差為0.07%。實(shí)驗(yàn)結(jié)果表明顯微激光誘導(dǎo)擊穿光譜技術(shù)能有效應(yīng)用于物質(zhì)微區(qū)元素的高精度定性、定量分析。
[Abstract]:The microlaser-induced breakdown spectroscopy was used to quantitatively analyze the standard samples of low alloy steel. The spatial resolution was 20 渭 m and the limit (LoD) of monopulse detection was 0.10 渭 m. The basic calibration curve of Mn element was obtained according to the relationship between spectral line strength and element concentration. The fitting coefficient of calibration curve R _ (2) was 0.97. The concentration of Mn element in the sample was predicted by de-cross validation method. The average prediction error of seven samples is 12.91, and the root mean square error of cross-validation is 0.11. The fitting coefficient of calibration curve is 0.99, the average prediction error of seven samples is 7.25, and the root mean square error of cross-validation is 0.07. The experimental results show that the micro-laser-induced breakdown spectroscopy can be effectively applied to the high precision qualitative and quantitative analysis of the elements in the material microregion.
【作者單位】： 華中科技大學(xué)武漢光電國(guó)家實(shí)驗(yàn)室(籌)激光與太赫茲功能實(shí)驗(yàn)室;
【基金】：國(guó)家重大科學(xué)儀器設(shè)備開(kāi)發(fā)專項(xiàng)(2011YQ160017) 中國(guó)博士后科學(xué)基金項(xiàng)目(2013M542014) 中央高�；究蒲袠I(yè)務(wù)費(fèi)項(xiàng)目(CXY13Q021,CXY13Q022)資助
【分類號(hào)】：TG115.33

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本文編號(hào)：2308169