射频氦等离子体原子发射光谱用于毛细管气相色谱检测

1　IntroductionInmodernanalyticalchemistry ,chromatographyandemissionspectroscopyandtheircombinedusearebecominganincreasinglyimportanttechniqueforthemeasurementofenvironmentalpollu tants.AtomicemissiondetectorusedinGCcanprovidehighlysensitiveandselectiveresponsewithwidedynamicrangeforvariouselementsinelutingcompounds[1—4 ].Itcanalsoprovidespectrumofelementssimultaneously ,sotheycouldbeusedforempiricalformuladetermination .Wehavedevelopedanatomicemissiondetectorusingradiofrequencydischargepla…     

南渡江铁含量测定的影响因素

调查南渡江铁在溶解相和颗粒相的分布,并开展实验探讨颗粒物和pH对铁测定的影响。南渡江下游总铁的变化范围从1.374到3.098 mg/L,跟浊度呈现较强的相关性(R2=0.8930)。溶解态铁的变化范围为0.043~0.072 mg/L,仅占总铁2%~3%。自然静置实验铁的浓度从1.550 mg/L降到0.043 mg/L,移除率达到93.1%。加酸静置实验表明加酸能促使颗粒态或胶体态铁析出到溶解相。     

不同产地野生鱼腥草根、茎、叶中常量和微量元素含量的比较研究

为开发和利用鱼腥草提供一定的科学依据,研究采用微波消解技术处理样品,利用电感耦合等离子发射光谱法测定了我国广西,湖南和云南三个不同产区鱼腥草地下茎,叶片和花中S,P,K,Ca,Mg,Fe,Zn,Cu,Mn和Se等十种常量和微量元素的含量.研究结果表明:不同产地鱼腥草元素的含量呈现地域差异,鱼腥草不同部位元素的含量存在差异.同一部位不同元素的含量也不尽相同.鱼腥草中含有丰富的S,P,K,Ca,Mg.分析结果的平均回收率在95.3%~102.8%之间.该方法简单,快速,可靠,灵敏度高,且多元素可同时测定,能满足实际样品分析要求.测定结果为进一步探讨鱼腥草中元素的含量与其功能的相关性提供了参考.表3,参14.     

电感耦合等离子体发射光谱法（ICP—AES）测定水中钴

利用电感耦合等离子体发射光谱法测定水中钴，并优化了测定条件。结果表明，本方法检出限低，准确度高，精密度好。     

电感耦合等离子体发射光谱法测定腐殖酸中的硼

用NHO3和HCl的混合酸分解腐殖酸样品，选用波长208.96nm于ICP测定。分析结果与比色法、容量法吻合。相对标准偏差为1.05%，回收率为97.87%－104.45%。     

ICP—AES光谱法同时测定固体废弃物中的多种元素

采用常规酸消化方法分解锑渣和铋渣固体废弃物试样．处理后的消解液直接用ＩＣＰ—ＡＥＳ法同时测定了Ｃｕ、Ｐｈ、Ｍｎ、Ｃｒ、Ｎｉ、和Ｚｎ等多种重金属元素。方法的精密度和准确度较好，适合于常规固体环境样品的分析。     

用连续电感藕合等离子体——原子发射光谱法间接测定水样中铬的形态

用连续电感藕合等离子体———原子发射光谱法间接测定水样中铬的形态许孙曲许燕编译（南方冶金学院赣州３４１０００）１实验１１装置使用Ｓｐｅｃｔｒｏｆｌａｍｅ连续电感藕合氩等离子体发射光谱仪（Ｓｐｅｃｔｒｏ，德国）测定Ｃｒ和Ｃｕ。表１为光谱测定的操作参数...     

电感耦合等离子体发射光谱法测定土壤铜锌锰镍铬钒全钾

用电感耦合等离子体发射光谱法测定土壤元素,并优化了测定条件。结果表明:该方法检出限低,准确度高,精密度好。     

Characteristics of emissive spectrum and the removal of nitric oxide in N2/O2/NO plasma with argon additive

Although the approach using non-thermal plasma (NTP) for deNOx has been studied for over 15 years, how to achieve higher removal e ciency with lower cost is still a barrier for its industrial application. In order to investigate the impact of the argon additive on electron density, energy and nitric oxide reduction process in plasma, the spectrum of the dielectric barrier discharge at atmospheric pressure in a coaxial reactor was measured using the monochromater with high resolution. The comparative experiments for NO reduction were carried out simultaneously in N2/O2/NO plasma stream with and without argon, respectively. The nitrogen molecular spectrum which is attributed to the energy level transition (C3 u ! B3 g) was compared in the wavelength range 300–480 nm and the electron density and temperature were determined based on the relative intensities and Stark broadening width of spectral lines. The spectrum results indicated that the argon additive could enhance the intensity of emissive spectrum of plasma, thus the electron concentration as well as the energy was increased, and finally prompted the ionization rate to produce active N, O and O3. The results of NO reduction showed that NO conversion e ciency increased in the range of 10%–30% with 5% addition of argon in stream comparing with the condition without argon additive. This study will play a positive role in the industrial application of dielectric barrier discharge deNOx reactor.     

ICP-AES法测定不同地区香菇中常量和微量元素的研究

试验采用电感耦合等离子体-原子发射光谱法(ICP-AES)测定了大理、怒江、德宏三个地区香菇中Ca、Mg、Fe、S、P、K,Zn,Cu,Mn等9种元素的含量.研究结果表明:不同产地香菇同一元素含量存在差异,其中Fe的含量差异最为明显;此外,同一产地不同元素含量也存在差异.此方法具有简单、快速、可靠、高敏等特点,并且可同时测定多种元素.研究结果能够为进一步探讨香菇中元素的含量与其功能的相关分析提供参考,也能够为元素的开发利用以及香菇的栽培提供一定的指导意义.