Use of capillary electrophoresis with dual-opposite end injection for simultaneous analysis of small ions in saliva samples from wrestlers undergoing a weight training program

Mori, Miwako; Ishikawara, Fumi; Tomoda, Toshihiro; Yamada, Sachiko; Okamoto, Minako; Itabashi, Hideyuki; Seki, Yoichi; Matsumoto, Ryûtarô; Shoho, Yoshifumi; Martha, Larasati; Sumino, Hiroyuki; Murakami, Masami

doi:10.1016/j.jchromb.2016.01.037

Cited by 23 publications

(19 citation statements)

References 66 publications

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“…It was shown that the recovery ranged from 95 to 112% with relative standard deviations going up to 2.6% for most ions except for sodium and chloride which were around 15%. Similar recoveries, for human saliva samples, were reported by Mori et al30 showing values from 96 to 110% for the investigated ions. summary of pH, conductivity, and density values of each sample is given inTable 4.…”

supporting

confidence: 88%

“…Similar results were also presented by Mori et al30 who used a DOEI approach to analyse ions in saliva. The homogeneity of variance (for the working range of the calibration) was proven for all ions and included a Grubbs' test for outliers.…”

supporting

confidence: 85%

“…Similar recoveries, for human saliva samples, were reported by Mori et al30 showing values from 96 to 110% for the investigated ions.3.2 | Analysis of waste samples3.2.1 | Physicochemical parametersA summary of pH, conductivity, and density values of each sample is given inTable 4. It was shown that the recovery ranged from 95 to 112% with relative standard deviations going up to 2.6% for most ions except for sodium and chloride which were around 15%.…”

supporting

confidence: 79%

“…The higher deviations in their study compared to the ones presented here are likely due to the fact that they did not use an internal standard. Similar results were also presented by Mori et al 30 Using spiked waste samples, the recovery for each ion was calculated Summary of the characterisation results. Given are the physicochemical parameters, the ionic loads, and the main organic compound of each sample.…”

Section: Validation Of the Ce-c 4 D Methodsmentioning

confidence: 55%

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Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Hauser

Hulshof

Rößler

et al. 2018

Drug Testing and Analysis

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Chemical waste from the clandestine production of amphetamine is of forensic and environmental importance due to its illegal nature which often leads to dumping into the environment. In this study, 27 aqueous amphetamine waste samples from controlled Leuckart reactions performed in Germany, the Netherlands, and Poland were characterised to increase knowledge about the chemical composition and physicochemical characteristics of such waste. Aqueous waste samples from different reaction steps were analysed to determine characteristic patterns which could be used for classification. Conductivity, pH, density, ionic load, and organic compounds were determined using different analytical methods. Conductivity values ranged from 1 to over 200 mS/cm, pH values from 0 to 14, and densities from 1.0 to 1.3 g/cm . A capillary electrophoresis method with contactless conductivity detection (CE-C D) was developed and validated to quantify chloride, sulphate, formate, ammonium, and sodium ions which were the most abundant ions in the investigated waste samples. A solid-phase extraction sample preparation was used prior to gas chromatography-mass spectrometry analysis to determine the organic compounds. Using the characterisation data of the known samples, it was possible to assign 16 seized clandestine waste samples from an amphetamine production to the corresponding synthesis step. The data also allowed us to draw conclusions about the synthesis procedure and used chemicals. The presented data and methods could support forensic investigations by showing the probative value of synthesis waste when investigating the illegal production of amphetamine. It can also act as starting point to develop new approaches to tackle the problem of clandestine waste dumping.

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supporting

confidence: 88%

supporting

confidence: 85%

supporting

confidence: 79%

Section: Validation Of the Ce-c 4 D Methodsmentioning

confidence: 55%

See 2 more Smart Citations

Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Hauser

Hulshof

Rößler

et al. 2018

Drug Testing and Analysis

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“…A CE‐C 4 D system for the simultaneous analysis of cations and anions in saliva samples from wrestlers was reported (Mori et al, ). A BGE consisting of 20 m m MES/20 m m HIS +1.5 m m 18C6 (pH 6.0) was used for the separation of four cations and eight anions in 12 min.…”

Section: Biomedical Analysismentioning

confidence: 99%

Application of capillary electrophoresis with capacitively coupled contactless conductivity detection (CE‐C⁴D): An update

Elbashir

Schmitz

Aboul‐Enein

2017

Biomedical Chromatography

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Capacitively coupled contactless conductivity detection (C D) has appeared as a powerful technique for the detection of compounds lacking chromogenic or fluorogenic group. Since our last review (Biomedical Chromatography 2014; 28: 1502-1506) several new capillary electrophoresis (CE)-C D methods have been reported. This review provides an update of the most recent utilization of CE-C D in the field of pharmaceutical, biomedical and food analysis covering the period from February 2014 to October 2016. The use of CE with C D in the pharmaceutical field has been shown in many papers. Examples illustrate the applicability of CE-C D in the fields of pharmaceutical, biomedical and food analysis. Finally, general conclusions and perspectives are provided.

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Contactless conductivity detection for analytical techniques— Developments from 2014 to 2016

Kubáň

Hauser

2016

Electrophoresis

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The development of capacitively coupled contactless conductivity detection for the two-year period from mid-2014 to mid-2016 is covered in this review. This includes a survey of fundamental studies and further developments of the measuring technique reported as well as a discussion of new applications. These mostly concern capillary electrophoresis carried out in conventional capillaries as well as on microchip electrophoresis devices. The main focus is on the determination of small non-UV-absorbing organic ions and inorganic ions in different types of samples of clinical, nutritional or environmental interest. Outside of electrophoresis contactless conductivity detection is finding uses in detection in column chromatography, flow-injection analysis and industrial applications.

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Use of capillary electrophoresis with dual-opposite end injection for simultaneous analysis of small ions in saliva samples from wrestlers undergoing a weight training program

Cited by 23 publications

References 66 publications

Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Application of capillary electrophoresis with capacitively coupled contactless conductivity detection (CE‐C⁴D): An update

Contactless conductivity detection for analytical techniques— Developments from 2014 to 2016

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Use of capillary electrophoresis with dual-opposite end injection for simultaneous analysis of small ions in saliva samples from wrestlers undergoing a weight training program

Cited by 23 publications

References 66 publications

Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Characterisation of aqueous waste produced during the clandestine production of amphetamine following the Leuckart route utilising solid‐phase extraction gas chromatography–mass spectrometry and capillary electrophoresis with contactless conductivity detection

Application of capillary electrophoresis with capacitively coupled contactless conductivity detection (CE‐C4D): An update

Contactless conductivity detection for analytical techniques— Developments from 2014 to 2016

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Application of capillary electrophoresis with capacitively coupled contactless conductivity detection (CE‐C⁴D): An update