scholarly journals ANALYSIS OF BISPHENOL A IN INDONESIAN CANNED FOOD BY GAS CHROMATOGRAPHY

2018 ◽  
Vol 10 (1) ◽  
pp. 19 ◽  
Author(s):  
Herman Suryadi ◽  
Amiratul Haq Rasyid ◽  
Harmita .
Keyword(s):  
Gas Chromatography ◽  
Bisphenol A ◽  
Gas Flow ◽  
Storage Conditions ◽  
Food Samples ◽  
Sample Type ◽  
Canned Food ◽  
Flame Ionization ◽  
Accuracy And Precision ◽  
Group A

Objective: This study aimed to design and optimize a gas chromatography-flame ionization detection (GC-FID) method to determine the bisphenol A (BPA)content in Indonesian canned food samples.Methods: GC with Hewlett-Packard-1 capillary columns (length, 30 m; inside diameter, 0.25 mm; and film thickness, 0.25 μm) was used with a columntemperature of 150°C that was programmed to increase by 10°C/min to 260°C. Injector and detector temperatures were 280 and 300°C, respectively,the gas flow rate was 1.0 mL/min, and injection volume was 3.0 μL. Three types of canned food samples were prepared by ethyl acetate extraction andstored under four different conditions (4–8°C, 25–30°C, 40°C for 30 min, and 40°C for 60 min) to determine BPA migration levels.Results: Method validation (system compatibility, selectivity, calibration curve linearity, accuracy, and precision) was acceptable for BPAconcentrations ranging from 2 to 15 μg/mL, with a coefficient of correlation of 0.99983. The limits of detection and quantitation were 0.287 and0.956 μg/mL, respectively. Only one canned food sample type (Group A) showed BPA contamination under all storage conditions and exceeded therecommended guidelines for daily ingestion.Conclusion: The optimized GC-FID method was selective and relatively sensitive in the detection and quantitation of BPA. Furthermore, higherstorage temperatures and durations increased the level of BPA migration into food.

Establishment of Gas Chromatography Analytical Method for 4-Amino-2-Methylpentane

2017 ◽  
Vol 865 ◽  
pp. 624-629
Author(s):  
Shu Chun Zhao ◽  
Yan Yan Yan ◽  
Yue Zhang ◽  
Xin Rui Dong ◽  
Hua Zhao ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Flow Rate ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Pure Nitrogen ◽  
Column Temperature ◽  
Carrier Gas ◽  
Flame Ionization ◽  
Split Ratio ◽  
Accuracy And Precision

The aim of this paper was to establish a gas chromatography (GC) method for the determination of 4-amino-2-methylpentane and validate the methodology. The gas chromatography conditions such as column temperature, carrier gas flow rate, split ratio and the make-up gas flow rate were investigated in detail. The chromatographic column used in this method was capillary column of DA-1. The oven temperature was initially held at 40 °C for 15 min and was then programmed temperature to 140 °C at the rate of 75 °C/min and held for 10 min. The injection temperature was 180 °C and the flame ionization detector temperature was 200 °C. The carrier gas was high pure nitrogen with a flow rate of 0.8 mL/min. The split ratio was 130:1 and the make-up gas flow rate was 30 mL/min. Good linearity of 4-amino-2-methylpentane was obtained within the concentration range of 25.44 mg/mL to 84.81 mg/mL and the correlation coefficient was 0.9990. Good accuracy and precision were obtained and the average recovery was 101.76%. The quantification limit of 4-amino-2-methylpentane was 7.21 μg/mL and the detection limit of that was 3.72 μg/mL. The method was well-validated and proved to be used for quality test of 4-amino-2-methylpentane.

Study of Endocrine Disruptors in the Sediment of a South Brazilian River

2015 ◽  
Vol 1120-1121 ◽  
pp. 862-866
Author(s):  
Irajá Do Nascimento ◽  
Nathália Christine Vieceli ◽  
Michele Schmitz ◽  
Fernanda Glaeser
Keyword(s):  
Gas Chromatography ◽  
Bisphenol A ◽  
Endocrine Disruptors ◽  
River Sediment ◽  
Flame Ionization Detection ◽  
River Contamination ◽  
Ionization Detection ◽  
Flame Ionization ◽  
Organic Extracts ◽  
Ethylhexyl Phthalate

This study investigated the occurrence of di (2-ethylhexyl) phthalate (DEHP) di-n-butylphthalate (DBP) and bisphenol A (BPA) in river sediment. The samples were collected from three selected points and extracted by sonication, using n-hexane and ethanol. The organic extracts were analyzed by gas chromatography with flame ionization detection (GC/FID). DBP and BPA were not detected. The average concentrations of DEHP range from 0.72 (±0.04) to 27.90 (± 3.05) ng g-1 of sediment. The best solvent for the extractions was n-hexane. However ethanol also shows good extraction yields of DEHP. These results showed an important anthropic contribution for the river contamination by endocrine disruptors.

scholarly journals Determination of N-Octyl Bicycloheptene Dicarboximide, Pyrethrins, and Butylcarbityl 6-Propylpiperonyl Ether in Technical Materials, Concentrates, and Finished Products by Capillary Gas Chromatography: Collaborative Study

1998 ◽  
Vol 81 (3) ◽  
pp. 503-512 ◽  
Author(s):  
Khanh T Nguyen ◽  
Richard Moorman ◽  
Virginia Kuykendall ◽  
◽  
L Bura ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Collaborative Study ◽  
Piperonyl Butoxide ◽  
Capillary Gc ◽  
Split Injection ◽  
Flame Ionization ◽  
Accuracy And Precision ◽  
Insecticidal Compounds

abstract Nineteen collaborating laboratories (including the authors') analyzed 6 blind, duplicate pairs of various technical materials, pyrethrum extracts, concentrates, and finished products by split injection capillary gas chromatography (GC) with flame ionization detection. This procedure simultaneously quantitates with speed, ease, accuracy, and precision all 6 insecticidal compounds in pyrethrum: pyrethrin I, jasmolin I, cinerin I, pyrethrin II, jasmolin II, and cinerin II, as well as butylcarbityl 6-propylpiperonyl ether (BPE, the predominant compound in technical piperonyl butoxide, also commonly known as piperonyl butoxide) and both the endo and exo isomers of N-octyl bicycloheptene dicarboximide (MGK 264). Repeatability ranged from 4.28 to 7.22% for total pyrethrins, from 2.41 to 7.04% for BPE, and from 2.20 to 4.91 % for total MGK 264. Reproducibility ranged from 5.22 to 9.71 % for total pyrethrins, from 4.37 to 7.04% for BPE, and from 2.66 to 6.01 % for total MGK 264. The capillary GC method for these insecticidal compounds in technical materials, concentrates, and finished products has been adopted first action by AOAC INTERNATIONAL.

scholarly journals Development of a Gas Chromatography-Flame Ionization Method for the Detection and Quantification of 12 Flavoring Agents in Supplementary Feed

2020 ◽  
Vol 103 (3) ◽  
pp. 710-714
Author(s):  
Mi Jin Lee ◽  
Jeong Min Lee ◽  
Sungjin Kim ◽  
Hye Jin Park ◽  
Cheon Seok Jeon ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Animal Feed ◽  
Feed Additive ◽  
Accurate Analysis ◽  
Simple Method ◽  
Flame Ionization ◽  
Flavor Analysis ◽  
Analysis Methods ◽  
Accuracy And Precision ◽  
Supplementary Feed

Abstract A flavoring agent is a compound that serves to add flavor with a pleasant scent and is used as a feed additive. Current flavor analysis methods include reflux pretreatment, titration, neutralization titration, and inversion; these are all analytical methods in which deviations and errors between experiments are generated. Titration methods are characterized by difficult selectivity analysis both for mixtures containing two or more types of flavoring agents and also for very low content samples. Current analysis methods are therefore particularly unsuitable for these sample types. Thus, more precise and accurate analysis of flavor agents is needed. This study intends to develop and verify a multi-component simultaneous analysis method that can accurately confirm the guaranteed content of 12 flavor agents of supplementary feeds distributed in the market, the goal being to establish a universally trusted method. Method validation was performed according to the International Conference on Harmonization (ICH) and International Union of Pure and Applied Chemistry (IUPAC) guidelines. Method validation was performed in terms of linearity, sensitivity, selectivity, accuracy, and precision. The limits of detection (LOD) for the instrument employed in these experiments ranged from 0.44–4.77 mg/kg, and the limits of quantification (LOQ) ranged from 1.32–14.31 mg/kg. Average recoveries of the 12 flavoring agents ranged from 75.1–111.4%. Maximum %RSD values for intraday and interday peak area variation are 13.09% and 13.08%, respectively. A novel and simple method for detecting 12 flavoring agents in animal feed supplements using a gas chromatography-flame ionization detector (GC-FID) was developed.

scholarly journals Dialkylketones in Paperboard Food Contact Materials—Method of Analysis in Fatty Foods and Comparative Migration into Liquid Simulants Versus Foodstuffs

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 915
Author(s):  
Antía Lestido-Cardama ◽  
Ángela Störmer ◽  
Roland Franz
Keyword(s):  
Gas Chromatography ◽  
Edible Oils ◽  
Food Samples ◽  
Contact Materials ◽  
Food Contact ◽  
Flame Ionization ◽  
Federal Institute ◽  
Sunflower Oils ◽  
Sizing Agents ◽  
Migration Limit

Dialkyl diketene dimers are used as sizing agents in the manufacture of paper and board for food contact applications to increase wetting stability. Unbound residues can hydrolyze and decarboxylate into dialkylketones. These non-intentionally added substances (NIAS) have potential to migrate to fatty foods in contact with those packaging materials. In Germany, the Federal Institute for Risk Assessment (BfR) established a specific migration limit (SML) of 5 mg/kg for the transfer of these dialkylketones into foodstuffs. In order to investigate the differences between simulants and real foods, an analytical method was optimized for extraction and quantification of dialkylketones in edible oils and fatty foods by gas chromatography coupled with flame ionization detection (GC-FID), and additionally by gas chromatography with mass spectrometry (GC-MS), to confirm their identification and to quantify them in case of interferences. Dialkylketones are separated from the extracted fat by alkaline saponification of the triglycerides. Dialkylketones migration from paper-based food contact articles into organic solvents isooctane and dichloromethane, in olive and sunflower oils, and in fatty foods (croissants, Gouda, cheddar cheese, and salami was studied). As a result, it was found that the simulating tests, including the edible oil extraction tests, gave migration values that exceeded the SML largely, while the migration with the food samples were largely below the SML.

scholarly journals VALIDATION OF ANALYTICAL METHOD OF 2,5-HEXANEDIONE ON URINE BY GAS CHROMATOGRAPHY

2019 ◽  
pp. 320-324
Author(s):  
MUCHTARIDI MUCHTARIDI ◽  
Kurnia Megawati ◽  
Febrina Amelia Saputri ◽  
Mulyana Mulyana
Keyword(s):  
Gas Chromatography ◽  
Analytical Method ◽  
Gas Flow ◽  
Limit Of Detection ◽  
Limit Of Quantification ◽  
Flame Ionization ◽  
System Suitability ◽  
Study Results ◽  
Validation Parameters ◽  
Validation Of Analytical Method

Objective: The purpose of this study was to obtain a valid analytical method for determining the level of 2,5-hexanedione in the urine of oil industry workers. Methods: Gas Chromatography (GC) was employed to analyze 2,5-hexanedione in the urine. The analysis was done using HP-5 (Crosslinked methyl siloxane) capillary columns 30 m x 0.320 mm long, film thickness 0.25 μm. The temperature of the detector temperature was 300 °C, and the injector temperature was 250 °C. The helium gas flow rate was 2 ml/min. The detector was Flame Ionization Detection (FID). Parameters of system suitability test and validation were obtained. Results: This study results that the method of analysis 2,5-hexanedione in urine by Gas Chromatography (GC) confirm the requirements of the validation method with a linearity was 0.99963, accuracy was in the range of 99.16% to 114.13%, the precision with % coefficient of variation was 1.65% to 5.16%, % coefficient variation of specificity was 0.027%, limit of detection was 0.054 μg/ml and limit of quantification was 0.18 μg/ml. Conclusion: The proposed GC method meets the acceptance criteria of validation parameters and can be applied for routine analysis.

scholarly journals QUALITY EVALUATION OF THE INTERNAL METALLIC COATING FOR SOME FOODS THAT AVAILABLE IN THE LOCAL MARKETS

2020 ◽  
Vol 12 (2) ◽  
pp. 12-21
Author(s):  
Mohammed A. Alsoufi1 ◽  
◽  
Adil. T. Al-Mousawi2 ◽  
IhsanHadi Obaid3 ◽  
◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Storage Conditions ◽  
Trade Mark ◽  
Food Samples ◽  
Warning Signs ◽  
Permissible Limit ◽  
Metallic Coating ◽  
Canned Food ◽  
Local Markets ◽  
Batch Number

The study aimed to estimate the content of lead and determine the quality of the internal coating of metal cans through electrical conductivity as well as to determine the accuracy of the information card for some types of canned food that available in local markets. The information card test showed that all of these samples contained the name of the food, trade mark, country origin, weight, and components, as was indicated by the company producing in all of them except for the C12 sample which was otherwise, and the batch number was mentioned in all samples except for the C3 and C17 which was not clear and not mentioned in the C21, and the validity period was observed (produce and finish) in all samples except for the C3, which was not clear, and all the samples contained storage conditions and warning signs except for the C1 and C3 that were not mentioned, and the language of the card for all models was Arabic and English as well as the C3 form contained the Persian language and the form C21 on the French language. The lead content (mg/ kg) in all samples was within the permissible limit in the Iraqi standard specifications, and the examination of the electrical conductivity of the internal metallic coating of canned food samples showed that the recorded values for the form C1, C9, C12 and C20 were 19.6±0.2944, 155.2±3.2568, 135.8±2.7725 and 88.5±2.8856 mA respectively, and this indicates the failure of these samples due to the electrical conductivity exceeding 10mA, while the C2, C3, C5, C6, C7, C10 and C11 samples succeeded in passing this test because the electrical conductivity did not exceed the permissible limit, while no examination of the remaining models for failure to fix the electrode at the base of the package.

scholarly journals Fatty Acids Composition in Selected Catering Products

2010 ◽  
Vol 67 (2) ◽  
Author(s):  
Cristian Tudor MATEA ◽  
Adrian MAZAREL ◽  
Maria MORAR ◽  
Constantin BELE ◽  
Andreea BUNEA
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Food Products ◽  
Food Samples ◽  
Dietary Lipid ◽  
Flame Ionization Detection ◽  
Fatty Acids Composition ◽  
Food Groups ◽  
Gas Chromatograph ◽  
Flame Ionization

Intake of dietary lipid is relevant to human health and should be subject of an extended research regarding quantitative and qualitative aspects. Catering food products investigated in the current study have been chosen from two food groups: fish based food products and meat based food products. Fatty acids were analyzed by gas chromatography (GC) with flame ionization detection (FID), a Shimadzu GC-17A series gas-chromatograph, equipped with a 30m polyethylene glycol coated column (Alltech AT-WAX, 0.25mm I.D., 0.25µm film thickness). Helium was used as the carrier gas at a pressure of 147 kPa. The injector and detector temperatures were set at 260ºC. For the oven temperature the following programe was used: 70ºC for 2 min. then raised to 150ºC at 10ºC/ min. rate and held at 150ºC for 3min., then further raised up to 235ºC at a 4ºC/min. A number of ten food samples were investigated. It was found that in the case of products from both food groups analyzed the predominant fatty acid is the oleic acid (18:1) and significant values for palmitic (16:0), linoleic (18:2) and stearic acid (18:0). The ratio between PUFA/SFA is 0.4 for the fish based products and 0.6 for the meat based products, lower than the threshold of 1.5 which is considered not to raise negative health effects.

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