Column Liquid Chromatography: Equipment and Instrumentation

LaCourse, William R.

doi:10.1021/ac00084a001

Cited by 19 publications

(2 citation statements)

References 487 publications

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“…Liquid chromatography (LC) is an established separation method, and over the years many useful LC detection methods have been developed. − However, few provide a universal response, which is useful when analyzing unknown samples. Currently optical detectors such as the UV−visible absorbance detector, the evaporative light scattering detector (ELSD), and the refractive index detector (RID) are widely used .…”

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confidence: 99%

Detector for Liquid Chromatography Based on Acoustic Emissions from an Oscillating Flame

Thurbide¹,

Xia²

2004

Anal. Chem.

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The acoustic flame detector (AFD) is examined as a novel detector for liquid chromatography (LC). It is based upon the acoustic emission frequency of an oscillating hydrogen/oxygen premixed flame and produces a universal response toward organic molecules. A stable frequency near 1000 Hz, which further depends on mobile-phase composition, is achieved for flow rates in the microliter per minute range. The mass flow sensitivity of the AFD demonstrates a linear response over 3 orders of magnitude and a detection limit (S/sigma = 3) of approximately 15 ng of C/s for a series of alcohols. For cyclopentanol, this amounts to an injected mass of approximately 77 ng based on a 0.5-microL injection of a 196 ppm solution in methanol (flow rate 20 microL/min methanol; peak width 30 s). Similar sensitivity is observed using a water mobile phase. Low-frequency (1/f ) noise contributions are dominant with or without mobile phase present. The AFD demonstrates a uniform molar sensitivity toward carbon compounds independent of their optical properties or volatility. Results suggest the device might serve as a simple, inexpensive universal LC detector.

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confidence: 99%

Detector for Liquid Chromatography Based on Acoustic Emissions from an Oscillating Flame

Thurbide¹,

Xia²

2004

Anal. Chem.

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“…Nas últimas duas décadas, várias revisões têm tratado do tema, não cabendo aqui comentários extensivos sobre estas técnicas. [61][62][63][64][65][66][67][68] A cromatografia gasosa e a cromatografia líquida de alta eficiência em combinação com a espectrometria de massas, abreviadas respectivamente como CG-EM e CLAE-EM, continuam sendo as técnicas predominantes para a separação, identificação e quantificação de poluentes orgânicos, metabólitos e produtos de transformação no ambiente. 69 As técnicas analíticas acopladas (CG-EM, CLAE-EM) têm a capacidade de gerar extensa quantidade de informações quando aplicadas a misturas complexas de contaminantes ambientais.…”

Section: Métodos De Quantificação De Quinonasunclassified

Sources, Formation, Reactivity and Determination of Quinones in the Atmosphere

2016

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Luminol Chemiluminescence with Heteropoly Acids and its Application to the Determination of Arsenate, Germanate, Phosphate and Silicate by Ion Chromatography

Fujiwara

Kurahashi

Kumamaru

et al. 1996

Applied Organom Chemis

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A flow‐injection chemiluminescence (CL) method has been proposed for sensitive determination of arsenate, germanate, phosphate and silicate, after separation by ion chromatography (IC). The post‐column detection system involved formation of heteropoly acid in a H2SO4 medium before the CL reaction with luminol in an NaOH medium. For separation, heteropoly acid formation and the CL detection reaction, pH requirements were not compatible. When present as a heteropoly acid complex with molybdenum(VI), ger‐ manium(IV) and silicon(IV) caused CL emission from oxidation of luminol, and such a CL oxidation of luminol was observed analogously for arsenic(V) and phosphorus(V) but with the addition of metavanadate ion to the acid solution of molybdate. Good sensitivity for the three analytes arsenic(V), ger‐ manium(IV) and phosphorus(V) could be given by a single set of reagent conditions, chosen carefully. Another set was suitable for determining phosphorus(V) and silicon(IV). The minimum detectable concentrations of arsenic(V), germanium(IV), phosphorus(V) and silicon(IV) were 10, 50, 1 and 10 μg l−1, respectively. Linear calibrations for arsenic(V), germanium(IV), phosphorus(V) and silicon(IV) were established over the respective concentration ranges of 10–1000, 50–25000, 1–1000 and 50–1 μg l−1. The proposed IC–CL method was successfully applied to analyses of a seaweed reference material, rice wine and water samples.

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Column Liquid Chromatography: Equipment and Instrumentation

Cited by 19 publications

References 487 publications

Detector for Liquid Chromatography Based on Acoustic Emissions from an Oscillating Flame

Detector for Liquid Chromatography Based on Acoustic Emissions from an Oscillating Flame

Sources, Formation, Reactivity and Determination of Quinones in the Atmosphere

Luminol Chemiluminescence with Heteropoly Acids and its Application to the Determination of Arsenate, Germanate, Phosphate and Silicate by Ion Chromatography

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