Application of gradient ratio flow-injection technique to implementation of the Chemical H-point Standard Addition Method

Wieczorek, Marcin; Dębosz, Marek; Świt, Paweł; Woźniakiewicz, Aneta; Kościelniak, Paweł

doi:10.1016/j.talanta.2018.03.096

Cited by 11 publications

(2 citation statements)

References 14 publications

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“…Furthermore, since an automated system is more isolated from the environment, sample contamination or alteration is minimized and analyst safety is highly improved while working with hazardous substances [ 2 , 3 ]. For the purpose of automation sample pre-treatment and analysis, flow-based methods are mostly exploited [ 4 , 5 , 6 ]. The vast majority of papers related to automation of separation techniques focus on sample pre-treatment [ 7 , 8 ], rather than online preparation of calibration solutions.…”

Section: Introductionmentioning

confidence: 99%

An Automated Hydrodynamically Mediated Technique for Preparation of Calibration Solutions via Capillary Electrophoresis System as a Promising Alternative to Manual Pipetting

et al. 2021

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In this paper, a novel procedure for preparing calibration solutions for capillary electrophoresis (CE)-based quantitative analysis is proposed. Our approach, named the automated hydrodynamically mediated technique (AHMT), uses a capillary and a pressure system to deliver the expected amount of working solution and diluent directly to a sample vial. As a result, calibration solutions are prepared automatically inside the CE instrument, without any or with minimal manual operation. Two different modes were tested: forward and reverse, differing in the direction of hydrodynamic flow. The calibration curves obtained for a model mixture of analytes using AHMT were thorough compared to the standard procedure based on manual pipetting. The results were consistent, though the volume of obtained calibration solutions and the potential risk of random errors were significantly minimized by AHMT. Its effectiveness was further enhanced by the application of SCIEX® nanoVials, reducing the actual volume of calibration solutions down to 10 μL.

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Section: Introductionmentioning

confidence: 99%

An Automated Hydrodynamically Mediated Technique for Preparation of Calibration Solutions via Capillary Electrophoresis System as a Promising Alternative to Manual Pipetting

et al. 2021

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“…Several methods have been employed for nitrite detection, such as chromatography [6], spectrophotometry [7], capillary electrophoresis [8], chemiluminescence [9], colorimetry [10], fluorescence spectroscopy [11], high-performance liquid chromatography [12], and electrochemical methods [13,14]. Electrochemical methods are very popular because of their simple operation, sensitive response and fast detection [15].…”

Section: Introductionmentioning

confidence: 99%

A Facile Electrochemical Sensor Labeled by Ferrocenoyl Cysteine Conjugate for the Detection of Nitrite in Pickle Juice

Feng

Ferranco

et al. 2019

Sensors

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Simple and facile electrochemical sensors for nitrite detection were fabricated by directly depositing ferrocenoyl cysteine conjugates Fc[CO-Cys(Trt)-OMe]2 [Fc(Cys)2] or Fc[CO-Glu-Cys-Gly-OH] [Fc-ECG] on screen-printed electrodes (SPEs). The modified carbon electrodes were characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Results indicated that Fc-ECG/SPE sensor showed enhanced current response and a lower overpotential than Fc(Cys)2/SPE sensor for nitrite detection. Optimal operating conditions were estimated for nitrite detection by DPV. The concentration of nitrite showed a good linear relationship with the current response in the range of 1.0–50 μmol·L−1 and with 0.3 μmol·L−1 as the concentration for limit of detection. There were no interferences from most common ions. The development of this electrochemical sensor was used for nitrite detection in pickled juice with a R.S.D. lower than 2.1% and average recovery lower than 101.5%, which indicated that disposable electrochemical sensor system can be applied for rapid and precise nitrite detection in foods.

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Calibration Approaches for Detection and Examination of Interference Effects

2023

Calibration in Analytical Science

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Application of gradient ratio flow-injection technique to implementation of the Chemical H-point Standard Addition Method

Cited by 11 publications

References 14 publications

An Automated Hydrodynamically Mediated Technique for Preparation of Calibration Solutions via Capillary Electrophoresis System as a Promising Alternative to Manual Pipetting

An Automated Hydrodynamically Mediated Technique for Preparation of Calibration Solutions via Capillary Electrophoresis System as a Promising Alternative to Manual Pipetting

A Facile Electrochemical Sensor Labeled by Ferrocenoyl Cysteine Conjugate for the Detection of Nitrite in Pickle Juice

Calibration Approaches for Detection and Examination of Interference Effects

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