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The even-parity autoionizing resonance series 3p5np''[3/2]1,2, 3p5np''[1/2]1, and 3p5nf''[5/2]3 of Ar have been investigated exciting from the two metastable states 3p54s[3/2]2 and 3p54s''[1/2]0 in the photon energy range of 32500-35600 cm-1 with an experimental bandwidth of ~0.1 cm-1. The excitation spectra of the even-parity autoionizing resonance series show typical asymmetric line shapes. New level energies, quantum defects, line profile index and resonance widths, resonance lifetime and reduced widths of the autoionizing resonances are derived by a Fano-type line-shape analysis. The line profile index q and the resonance widths Γ are shown to be approximately proportional to the effective principal quantum number n*. The line separation of the 3p5np'' autoionizing resonances is discussed. 相似文献
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采用在线催化-气相色谱/串联质谱技术建立了进口氯化石蜡原料中短链氯化石蜡的测定方法。样品以正己烷为溶剂,固相萃取柱净化分离,采用预先在衬管中填装好催化剂的气相色谱/串联质谱仪进行测定,短链氯化石蜡经催化脱氯加氢后转化为正构烷烃,经DB-5MS UI(30 m×0.25 mm×0.25μm)色谱柱分离,多反应监控(MRM)模式分析检测,内标法定量。还原产物C10~C13直链烷烃线性关系良好,相关系数≥0.9951。C10~C13直链烷烃的方法定量限为0.03~0.05μg/mL,相当于样品中C10~C13的短链氯化石蜡总含量为3.18μg/g。样品加标回收率为87.2%~115.4%,相对标准偏差(RSD,n=6)≤6.5%。本方法具有灵敏度高及准确性好等优点,不需要化学电离源装置的气相色谱/质谱或高分辨气相色谱/质谱即能达到较低的检出限,方法适用于进口氯化石蜡原料中短链氯化石蜡含量的快速测定。 相似文献
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采用吹扫捕集-气相色谱串联质谱(P&T-GC-MS/MS)技术建立了测定消毒洗手液中10种含氧消毒有效成分的方法。样品用蒸馏水稀释处理,稀释液吹扫进样,通过响应面方法优化吹扫条件,目标物通过吹扫富集于捕集阱中,热脱附后进入气相色谱。经DB-624 UI色谱柱(60 m×0.25 mm×1.40μm)分离后,采用多反应监测(MRM)模式分析检测,内标法定量。11种消毒有效成分在浓度4~250 ng/mL范围内与峰面积呈线性关系。方法定量限为0.005~0.0115μg/g,能满足相关标准中对甲醇等物质的限值要求。样品加标回收率在85.1%~116.0%,相对标准偏差(RSD)≤5.3%(n=6)。结果表明本方法快速简单、准确可靠,适用于进出口消毒洗手液中10种含氧有效成分的批量分析测定。 相似文献