A flame photometric detector with a silicon photodiode assembly for sulfur detection

Ni, Lanxiu; Geng, Xuhui; Li, Shenghong; Ning, Haijing; Gao, Yan; Guan, Yafeng

doi:10.1016/j.talanta.2019.120283

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…In Figure b, a biconvex lens was used for the better collection of S 2 * emission light by H5784, which was placed 2 mm away from the lens. Our previous work has proved that a broad-band pass filter together with a QB21 glass could increase the SNR of FPD compared with a narrow-band pass filter when a photodiode assembly (PDA) was used as a photodetector . For PMT, however, the situation is different.…”

Section: Resultsmentioning

confidence: 99%

“…Our previous work has proved that a broad-band pass filter together with a QB21 glass could increase the SNR of FPD compared with a narrow-band pass filter when a photodiode assembly (PDA) was used as a photodetector. 36 For PMT, however, the situation is different. It was found that only a slight improvement in the SNR was observed using a broad-band pass filter and an additional focus lens because the signal and noise level increased simultaneously, as shown in Table S2.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Variation of the quartz rod diameter could influence the shape, volume, and temperature of the flame zone around the quartz rod. In our preliminary study, a PDA 36 was used instead of a PMT in the FPD. This configuration was used here to save the experiment time since the PDA could withstand room light during the exchange of the quartz rod and recovered within a few seconds after closing the cover of the FPD.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

Ding

et al. 2021

Anal. Chem.

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A transparent quartz rod (q) placed vertically on top of a non-premixed hydrogen microjet flame in a flame photometric detector (qFPD) was developed and evaluated for sulfur detection. The microjet flame burned around the quartz rod because of Coanda effect, forming an extended downstream flame zone with a relatively low temperature between 550 and 650 °C, which is favorable to the formation of S 2 *. The emission intensity of S 2 * and the signal-to-noise ratio (SNR) of sulfur response were enhanced 2.6-and 2.1-fold, respectively. It was found that the quartz rod of diameter 4 mm with a tip shape of semicircle placed 6 mm above the nozzle yielded the highest SNR. The limits of detection (LOD) for seven kinds of tested sulfur-containing compounds of qFPD were 0.3−0.5 pg S s −1 , which is 5−7 times better than that of commercially available FPD detectors (LOD: 1.6−2.8 pg S s −1 ). The selectivity of sulfur over carbon was 10 5 on qFPD when the SNR for the mass flow rate of S and C atoms was ∼3 times. It was the first time that a quartz rod was used vertically on top of a microjet hydrogen-rich flame in FPD to enhance the chemiluminescence of S 2 * and improve the LOD down to 0.3−0.5 pg S s −1 .

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

Ding

et al. 2021

Anal. Chem.

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“…In this case, the advantage of the large photosensitive surface of S2386-44K is more obvious. 19 Evaluation of the Multichannel Fluorescence Detector by FIA. The performance of the developed multichannel fluorescence detector was evaluated in terms of LOD, linear range of response, and repeatability as shown in Figure 3.…”

Section: ■ Introductionmentioning

confidence: 99%

A Miniaturized and Highly Sensitive “Windmill” Three-Channel Fluorescence Detector for Simultaneous Detection of Various Mycotoxins

Wang,

Sha,

et al. 2024

Anal. Chem.

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“…Numerous reports are available for the micro-level determination of sulfur-containing drugs and molecules in biological samples and pharmaceutical preparations [20][21][22][23]. The determination methods includes potentiometry [24], NMR-spectrometry [25], colorimetry [20], chromatography [26][27][28], flow injection analysis [29], fluorimetry [30], voltammetry [31] and spectrophotometry [32,33]. The high initial investment, timeconsuming processes, high costs of sample analysis, and heavy instrumentation are major concerns of many reported methods.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

et al. 2021

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Abstract. A fast, reproducible, and sensitive method is proposed for the kinetic determination of carbocisteine (CCys). The method depends on the inhibitory property of carbocisteine, which reduces the Hg2+ catalyzed substitution rate of cyanide from [Ru(CN)6]4- with N-R-salt (1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt) via forming a stable complex with Hg2+. Spectrophotometric measurements were carried out by recording the absorbance at 525 nm (λmax of [Ru(CN)5 Nitroso-R-Salt]3- complex) at a fixed time of 10 and 15 min under the optimized reaction conditions with [N-R-salt] = 4.5 × 10-4 M, I = 0.05 M (KNO3), Temp = 45.0 ± 0.2 o C, pH = 7.0 ± 0.03, [Hg2+] = 8.0 × 10-5 M and [Ru(CN)64-] = 4.25 × 10-5 M. With the proposed method, CCys can be determined quantitatively down to 3.0 × 10-6 M. This methodology can be effectively used for the rapid quantitative estimation of CCys in the pharmaceutical samples with good accuracy and reproducibility. The addition of common excipients in pharmaceuticals even up to 1000 times with [CCys] does not interfere significantly in the estimation of CCys. Resumen. Se propone un método rápido, reproducibley sensible para la determinación cinética de la carbocisteina (CCys). El método depende de la propiedad inhibitoria de la carbocisteina que reduce la tasa de sustitución catalizada por Hg2+ del cianuro de [Ru(CN)6]4- con la sal N-R (sal disódica del ácido 1-Nitroso-2-naftol-3,6-disulfónico) mediante la formación de un complejo estable con Hg2+. Las mediciones espectrofotométricas se llevaron a cabo registrando la absorbancia a 525 nm (λmax del complejo [Ru(CN)5 Sal-Nitroso-R]3-) en un tiempo fijo de 10 y 15 min en las condiciones de reacción optimizadas con [sal-NR] = 4.5 × 10-4 M, I = 0.05 M (KNO3), Temp = 45.0 ± 0.2 o C, pH = 7.0 ± 0.03, [Hg2+] = 8.0 × 10-5 M y [Ru(CN)64-] = 4.25 × 10-5 M. Con el método propuesto, CCys se puede determinar cuantitativamente hasta 3,0 × 10-6 M. Esta metodología se puede utilizar eficazmente para la estimación cuantitativa rápida de CCys en las muestras farmacéuticas con buena precisión y reproducibilidad. La adición de excipientes comunes en productos farmacéuticos incluso hasta 1000 veces con [CCys] no interfiere significativamente en la estimación de CCys.

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A flame photometric detector with a silicon photodiode assembly for sulfur detection

Cited by 11 publications

References 27 publications

Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

A Miniaturized and Highly Sensitive “Windmill” Three-Channel Fluorescence Detector for Simultaneous Detection of Various Mycotoxins

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

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A flame photometric detector with a silicon photodiode assembly for sulfur detection

Cited by 11 publications

References 27 publications

Enhancement of Chemiluminescence Intensity of S2* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

Enhancement of Chemiluminescence Intensity of S2* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

A Miniaturized and Highly Sensitive “Windmill” Three-Channel Fluorescence Detector for Simultaneous Detection of Various Mycotoxins

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

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Product

Resources

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Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection

Enhancement of Chemiluminescence Intensity of S₂* in Non-premixed Hydrogen Microjet Flame in the Photometric Detector for Sulfur Detection