Measurement of HDO Products Using GC-TCD: Towards Obtaining Reliable Analytical Data

Zuas, Oman; Budiman, Harry; Mansur, Dieni; Mulyana, Muhammad Rizky

doi:10.1515/cse-2018-0001

Cited by 8 publications

(14 citation statements)

References 4 publications

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“…Based on analytical principle, the intraday precision of the GC-TCD method in this study can be considered acceptable since the %RSD values for every component in one day was found to be lower than 0.67 times of their corresponding CV Horwitz values (Zuas et al 2018). These results were found to be comparable with previous experiment reported for the measurement of H 2 , CO, CH 4 , or CO 2 (Li & Guan 2009).…”

Section: B Intraday Precision and Interday Precisionsupporting

confidence: 87%

“…Based on ISO/IEC 17025 requirements, all method validation parameters were assessed under an optimized GC-TCD condition by adopting a procedure in previous validation study, consisting of identity confi rmation, intraday precision and interday precision, accuracy, linearity, limit of detection (LoD), limit of quantifi cation (LoQ), and roughness (Zuas et al 2018). The validated method was then applied in the measurement of three syn-gas samples.…”

Section: Methodsmentioning

confidence: 99%

“…The percentage of relative standard deviation (%RSD) obtained from the repetitions was then compared with the coeffi cient of variance (CV) Horwitz. The CV Horwitz was calculated using Equation 1 (Zuas et al 2018):…”

Section: Methodsmentioning

confidence: 99%

“…The GC-TCD condition was fi rstly optimized to produce a reliable measurement result and obtained condition as seen in Table 2. In addition, a CMK calibrator (MCZ Umwelttechnick, Germany) was utilized for the dilution of the SGM-1 to obtain the calibration curve (Zuas et al, 2018).…”

Section: B Instrumentmentioning

confidence: 99%

“…Previous experiments has proven the capability of the TCD as a universal detector to measure permanent gases at %mol/mol level (Teodoru et al 2015, Zuas et al 2018 and it would likely be suitable for the concentration range of sawdust gasifi cation products. For the GC-TCD system, both Porapak Q and Molsieve 5A might be used as the columns to separate H 2 , CO 2 , CH 4 , and CO from their mixture , giving a posibble way for the measurement of such components in their mixture.…”

mentioning

confidence: 99%

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Simultaneous Measurement of Syn-Gas Component (H2, Co2, Ch4, and Co) as Product of Biomass Gasification by Using Validated Gc-TCD Method

Mulyana

Zuas

Budiman

et al. 2018

SCOG

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Biomass gasification has been widely known method to produce syn-gases, which can be considered as great alternative substitution for fossil fuels. However, accurate verification of the syn-gas composition requires a reliable and validated method for simultaneous measurement of H2, CO2, CH4, and CO. In order to fulfill the aforementioned requirements, which is the objective of this study; a GC-TCD method for simultaneous measurement of H2, CO2, CH4, and CO component in syn-gas has been validated in accordance to ISO/IEC 17025 and its application for real samples. For the method validation purpose, all of the performance parameters were evaluated and discussed in detail in this study. Intraday precision and interday precision were found to be acceptable having the %RSD below 0.67xCV Horwitz and below 1.0xCV Horwitz, respectively. The bias value falls within +2? for entire components, indicating that the method accuracy can be accepted. Coefficient correlation for all components was higher than 0.99, which means that the method has suffi cient linearity. LoD and LoQ for each component were found to be lower than typical syn-gas concentration range. The method roughness was also found in an acceptable level (the p-values was higher than 0.05 for allctarget components. Application of the validated method for the measurement of a real syn-gas samples indicated that the method is quite reliable to produce an accurate data and the validated methid can be used in a routine analysis. The innovation of this study, as shown by experiment results, is to evaluate the validated methods performance for simultaneous determination of syn-gas components concentration in one channel, compared to common method in which the syn-gas components were measured separatedly in a different channel.Biomass gasifi cation has been widely known method to produce syn-gases, which can be consideredas great alternative substitution for fossil fuels. However, accurate verifi cation of the syn-gas compositionrequires a reliable and validated method for simultaneous measurement of H2, CO2, CH4, and CO. Inorder to fulfi ll the aforementioned requirements, which is the objective of this study; a GC-TCD methodfor simultaneous measurement of H2, CO2, CH4, and CO component in syn-gas has been validated inaccordance to ISO/IEC 17025 and its application for real samples. For the method validation purpose,all of the performance parameters were evaluated and discussed in detail in this study. Intraday precisionand interday precision were found to be acceptable having the %RSD below 0.67xCV Horwitz and below1.0xCV Horwitz, respectively. The bias value falls within +2? for entire components, indicating that themethod accuracy can be accepted. Coeffi cient correlation for all components was higher than 0.99, whichmeans that the method has suffi cient linearity. LoD and LoQ for each component were found to be lowerthan typical syn-gas concentration range. The method roughness was also found in an acceptable level(the p-values was higher than 0.05 for allctarget components. Application of the validated method for themeasurement of a real syn-gas samples indicated that the method is quite reliable to produce an accuratedata and the validated methid can be used in a routine analysis. The innovation of this study, as shown byexperiment results, is to evaluate the validated methods performance for simultaneous determination ofsyn-gas components concentration in one channel, compared to common method in which the syn-gascomponents were measured separatedly in a different channel.Keywords: syn-gas, GC-TCD, method validation.

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Section: B Intraday Precision and Interday Precisionsupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: B Instrumentmentioning

confidence: 99%

mentioning

confidence: 99%

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Simultaneous Measurement of Syn-Gas Component (H2, Co2, Ch4, and Co) as Product of Biomass Gasification by Using Validated Gc-TCD Method

Mulyana

Zuas

Budiman

et al. 2018

SCOG

Self Cite

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Acicular Nickel on Carbon Nanofiber as Electrochemical Sensor Electrode for the Rapid Detection of Aqueous and Gaseous Formaldehyde at Room Temperature

2022

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The rapid and straightforward detection of formaldehyde (FA) in the environment is crucial for preventing the accidental inhalation of FA and limiting skin exposure to FA. In this study, we developed a simple nickel-based electrocatalytic electrode on carbon nanofibers (CNFsÀ Ni), which is suitable for rapidly detecting FA at room temperature. Centrifugal electrospinning was used to obtain polyacrylonitrile (PAN) nanofibers, which was subsequently stabilized and carbonized to fabricate the CNFs. Carbonization of the CNFs occurred at various temperatures (T c = 1200, 1300, 1400, and 1500 °C). PAN CNFs served as a highly conductive template for electroless plating under a magnetic field of 500 G to grow acicular nickel. The amperometric responses of the CNFsÀ Ni to aqueous FA were then measured. A lab-built amperometric gas sensor (CNFsÀ Ni 1-8), which comprised CNFs with a reduced Ni loading, was used as the electrode for detecting gaseous FA. Scanning electron microscopy (SEM), linear sweep voltammetry (LSV), cyclic voltammetry (CV), and chronoamperometry were used to evaluate the sensitivities of the electrodes. Within the linear range of 0.05-91.5 mM, the CNFs1400-Ni electrode was highly sensitive for detecting aqueous FA (2592 μA mM À 1 cm À 2 ), as evidenced by the fast response time (6 s). At a low concentration of gaseous FA (0.5 ppm), the laboratory-built FA gas sensor was stable (98.3 %) and had a fast response time (5 s) after 9 h of continuous operation.

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Optimization and Comparison of Microwave‐Assisted Extraction, Supercritical Fluid Extraction, and Eucalyptus Oil–Assisted Extraction of Polycyclic Aromatic Hydrocarbons from Soil and Sediment

Kariyawasam

Doran

Howitt

et al. 2023

Enviro Toxic and Chemistry

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Polycyclic aromatic hydrocarbons (PAHs) are persistent organic compounds of major concern that mainly accumulate in soils and sediments, and their extraction from environmental matrices remains a crucial step when determining the extent of contamination in soils and sediments. The objective of the present study was to compare the extraction of PAHs (phenanthrene, pyrene, chrysene, and benzo[a]pyrene) from spiked soil and sediment using supercritical fluid extraction (SFE) with ethanol as the modifier, microwave‐assisted extraction (MAE), and eucalyptus oil–assisted extraction (EuAE). Recoveries of PAHs were comparable between the three methods, and >80% of applied pyrene, chrysene and benzo[a]pyrene were recovered. The most efficient method of extracting PAHs from naturally incurred soils with different levels of contamination was SFE. A longer extraction time was required for the EuAE method compared with SFE and MAE under optimized conditions. However, EuAE required lower extraction temperatures (15–20 °C) compared with SFE (80 °C) and MAE (110–120 °C), and consumed less solvent than SFE and MAE. Compared with hexane/acetone used in MAE, the use of ethanol in SFE and eucalyptus oil in EuAE can be considered as more sustainable approaches to efficiently extract PAHs from spiked/naturally contaminated soils and sediments. And, although less efficient for matrices containing higher carbon content, EuAE offered a cheap, low‐tech approach to extracting PAHs. Environ Toxicol Chem 2023;42:982–994. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

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Measurement of HDO Products Using GC-TCD: Towards Obtaining Reliable Analytical Data

Cited by 8 publications

References 4 publications

Simultaneous Measurement of Syn-Gas Component (H2, Co2, Ch4, and Co) as Product of Biomass Gasification by Using Validated Gc-TCD Method

Simultaneous Measurement of Syn-Gas Component (H2, Co2, Ch4, and Co) as Product of Biomass Gasification by Using Validated Gc-TCD Method

Acicular Nickel on Carbon Nanofiber as Electrochemical Sensor Electrode for the Rapid Detection of Aqueous and Gaseous Formaldehyde at Room Temperature

Optimization and Comparison of Microwave‐Assisted Extraction, Supercritical Fluid Extraction, and Eucalyptus Oil–Assisted Extraction of Polycyclic Aromatic Hydrocarbons from Soil and Sediment

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