Simple and accurate method for determining dissolved inorganic carbon in environmental water by reaction headspace gas chromatography

Xie, Wei-Qi; Gong, Yi-Xian; Yu, Kong-Xian

doi:10.1002/jssc.201701061

Cited by 8 publications

(7 citation statements)

References 18 publications

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“…To obtain the vapor‐liquid equilibrium in the headspace vials before HS‐GC analysis, the effects of equilibration temperature and time were investigated for the wheat hydrolysate sample. According to the literature, [19,21] the vapor‐liquid equilibrium partition coefficient can be greatly affected by the temperature. Figure 4 shows the normalized GC signals (i. e., set the maximum signal under different testing conditions as one) of furfural after a 5 min equilibrium time at different temperatures (65, 75, 85, 95, 105 and 115 °C).…”

Section: Resultsmentioning

confidence: 99%

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Phase‐Transfer Strategy toward High‐Throughput Chromatographic Detection of Pentosan Content in Wheat‐Derived Products

et al. 2021

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This paper demonstrated a new approach for detecting pentosan content in wheat products enabled by phase‐transfer reaction technique. This approach was based on the phase‐transfer reaction of pentosans in wheat sample to furfural in an acidic medium. The hydrolysis reaction could be finished within 30 min at 90 °C, with a sulfuric acid concentration of 12.0 mol/L. The furfural generated from the hydrolysis of pentosan was then measured by headspace gas chromatography (HS‐GC) using a flame ionization detector (FID). The results showed that this method was precise (relative standard deviations (RSD)≤2.82 %) and accurate (relative differences (RD)≤6.49 % compared with the reference spectrophotometric method, the recoveries ranged from 98.1 to 102 %). Moreover, the developed approach is semi‐automated and efficient, which can be a good alternative method for the high‐throughput analysis of pentosan content in both laboratory and mill testing.

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Section: Resultsmentioning

confidence: 99%

“…Headspace gas chromatography (HS‐GC) is an efficient technique in the detection of volatile substances in complex samples [19–21] . In the HS‐GC technique, the effect of different sample matrices can be minimized for a correct determination of volatile compounds.…”

Section: Introductionmentioning

confidence: 99%

Phase‐Transfer Strategy toward High‐Throughput Chromatographic Detection of Pentosan Content in Wheat‐Derived Products

et al. 2021

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“…The carbonate content in the barite ore samples can be calculated using Equation (10) because the slope K in Equation ( 9) can be obtained using the calibration method.…”

Section: Methodology Of the Present Methodsmentioning

confidence: 99%

“…In contrast to traditional methods, headspace GC (HS-GC) is an effective technique for the analysis of volatiles in complex matrices. Several HS-GC methods have been developed to quantify analyte contents, such as dissolved inorganic carbon in environmental water [10], anhydride groups in anhydride-based epoxy hardeners [11], softening point of rosin [12], and hydrogen peroxide in pulp bleaching effluents [13]. A pressure-affected method for determining the CaCO 3 content of paper materials has been proposed [14].…”

Section: Introductionmentioning

confidence: 99%

Determination of carbonate content in barite ore by headspace gas chromatography

Liu

et al. 2022

J of Separation Science

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This paper reports a method for determining the carbonate content in barite ore using headspace gas chromatography. Based on the acidification reaction, the carbonate in the barite ore was converted to CO 2 in a closed headspace vial. When the carbonate content was significant, the pressure caused changes in the CO 2 and O 2 signals and affected the measurement accuracy. It was found that carbonate content is proportional to the intensity ratio of the CO 2 to O 2 signals. Thus, the carbonate content in barite ore can be measured indirectly using a theoretical model. The results showed that the carbonate in 3 g of barite ore sample with a particle size of 74 μm could react completely with a hydrochloric acid solution (2 mol/L) at 65 • C for 5 min. The method described herein had good precision (relative standard deviation < 4.14%) and accuracy (relative differences < 6.12%).

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“…Headspace (HS) GC has been proven to be an efficient tool in quantitatively analyzing volatile substances in the samples having complex matrixes [14][15][16][17][18][19][20]. The main advantage in HS-GC technique is that it can be performed at a precisely controlled temperature [21,22].…”

Section: Introductionmentioning

confidence: 99%

Measurement of water absorption capacity in wheat flour by a headspace gas chromatographic technique

Xie

Gong

2018

J of Separation Science

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The purpose of this work is to introduce a new method for quantitatively analyzing water absorption capacity in wheat flour by a headspace gas chromatographic technique. This headspace gas chromatographic technique was based on measuring the water vapor released from a series of wheat flour samples with different contents of water addition. According to the different trends between the vapor and wheat flour phase before and after the water absorption capacity in wheat flour, a turning point (corresponding to water absorption capacity in wheat flour) can be obtained by fitting the data of the water gas chromatography peak area from different wheat flour samples. The data showed that the phase equilibrium in the vial can be achieved in 25 min at desired temperature (35°C). The relative standard deviation of the reaction headspace gas chromatographic technique in water absorption capacity determination was within 3.48%, the relative differences has been determined by comparing the water absorption capacity obtained from this new analytical technique with the data from the reference technique (i.e., the filtration method), which are less than 8.92%. The new headspace gas chromatographic method is automated, accurate and be a reliable tool for quantifying water absorption capacity in wheat flour in both laboratory research and mill applications.

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Simple and accurate method for determining dissolved inorganic carbon in environmental water by reaction headspace gas chromatography

Cited by 8 publications

References 18 publications

Phase‐Transfer Strategy toward High‐Throughput Chromatographic Detection of Pentosan Content in Wheat‐Derived Products

Phase‐Transfer Strategy toward High‐Throughput Chromatographic Detection of Pentosan Content in Wheat‐Derived Products

Determination of carbonate content in barite ore by headspace gas chromatography

Measurement of water absorption capacity in wheat flour by a headspace gas chromatographic technique

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