Analysis of organochlorine DDT residue along with its metabolites in dry fishes from some selected markets of Dhaka city

A study was investigated to estimate the current status of health hazardous organochlorine insecticide DDT and its metabolites DDE and DDD in different species of dry fish. To achieve the goal of this experiment, ten different sun-dried fish samples were collected from different markets of Dhaka city. The concentration of DDT, DDE and DDD was determined using the capillary column coupled to Gas Chromatograph with Electron Captured Detector (GC-ECD). Most of the dry fishes, seven out of ten samples, were found to be contaminated with DDT along with its metabolites DDE and DDD ranging from 0.029-1.22 mg/kg which is a serious concern because of the nature of long persistency and bioaccumulation of DDT in the environment. The highest concentration of DDT (1.22 mg/kg) was observed in Pampus chinensis dry fish whereas low concentration was detected in Otolithoides pama (0.029 mg/kg). Asian Australas. J. Food Saf. Secur. 2021, 5 (2), 79-84

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Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh.

Journal of Scientific Agriculture ◽

10.25081/jsa.2017.v1.825 ◽

2017 ◽

Vol 1 ◽

pp. 264

Author(s):

Md Didarul Islam ◽

Ashiqur Rahaman ◽

Fahmida Jannat

Keyword(s):

Heavy Metals ◽

Adverse Effect ◽

The Other ◽

Nutrient Level ◽

Dhaka City ◽

Toxic Heavy Metals ◽

High Concentration ◽

Low Concentration ◽

Feed Formulation ◽

Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples.

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Pesticide residue in fishes from Rangpur

Bangladesh Journal of Zoology ◽

10.3329/bjz.v44i1.30172 ◽

2016 ◽

Vol 44 (1) ◽

pp. 1-8

Author(s):

Maria Zaman ◽

Nasim Sultana ◽

Mozaffar Husain ◽

M Niamul Naser

Keyword(s):

Public Health ◽

Ethyl Acetate ◽

Sulphuric Acid ◽

Food Chain ◽

Pesticide Residues ◽

Organic Pollutant ◽

Health Issues ◽

Gas Chromatograph ◽

Fish Samples ◽

Northwestern Bangladesh

Pesticide residues, specially the persistent organic pollutant (POP) were analyzed from some fish species of Rangpur floodplain, Bangladesh. Fish samples were extracted with ethyl acetate, cleaned by sulphuric acid and analyzed by gas chromatograph and gas chromatograph-mass spectrometer. Presence of endrin was detected in Taki fish (Channa punctatus) samples. Traces of other pesticides were also evident. This confirms the use of banned pesticide in the northwestern Bangladesh. We discussed some consequences of public health issues if these contaminantspasses through in the higher food chain from the wetland ecosystem.Bangladesh J. Zool. 44(1): 1-8, 2016

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Determination of N-Nitrosodimethylamine in the Smoke of High-Nitrate Tobacco Cigarettes

Beiträge zur Tabakforschung International/Contributions to Tobacco Research ◽

10.2478/cttr-2013-0310 ◽

1973 ◽

Vol 7 (2) ◽

Author(s):

G.P. Morie ◽

C.H. Sloan

Keyword(s):

Capillary Column ◽

Glass Capillary Column ◽

Gas Chromatograph ◽

Ionization Detector ◽

Glass Capillary ◽

Flame Ionization ◽

Basic Solutions ◽

Poly Ethylene ◽

Gas Chromatographic Method

AbstractA gas chromatographic method was developed for the determination of N-nitrosodimethylamine (NDMA) in cigarette smoke. The NDMA in the smoke of 200 cigarettes was trapped in a solution of sodium hydroxide and separated from most of the smoke components by distillation from acidic and basic solutions. The aqueous solution was extracted for 8 hr. into ethyl ether in a Dean Stark apparatus. To concentrate the solution of NDMA, the ether was distilled until only 5 ml of the solution remained. An aliquot of this solution was analysed by means of a gas chromatograph equipped with a 200-ft. glass capillary column coated with Carbowax 20-M poly(ethylene glycoI). An alkali metal flame ionization detector with a selectivity of 10*/1 for nitrogen compounds to normal hydrocarbons was used. Small amounts (2 ng) of nitrosamines in the presence of large amounts of other compounds were easily detected. N-nitrosodimethylamine-C

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MYCOLOGICAL EXAMINATION OF SMOKE DRIED FISH SOLD IN BIDA MAJOR MARKETS

European Journal of Biology ◽

10.47672/ejb.557 ◽

2020 ◽

Vol 5 (1) ◽

pp. 28-40

Author(s):

Walter C. John ◽

Binta A. Buba ◽

Timothy T. Ayisa ◽

Olusolape Oke ◽

Temitope A. Ihum ◽

...

Keyword(s):

Aspergillus Flavus ◽

Ultra Violet ◽

Small Market ◽

Fish Samples ◽

Fungal Load ◽

Increase Risk ◽

Plate Counts ◽

Dried Fish ◽

Mycological Examination ◽

Processing And Storage

Purpose: This research was conducted to determine the occurrence of aflatoxin producing fungi in smoke-dried fish in Bida.Methodology: The study was carried out at the Microbiology Laboratory Federal Polytechnic, Bida, Niger state. Smoke dried fish samples were collected randomly from three major markets in Bida town. Fungi isolation was done after serial dilution using Potato dextrose agar. Total fungal load per sample was obtained from plate counts and expressed as colony-forming units per gram (cfu/g). The isolates were identified microscopically using Lactophenol cotton blue stain. Aflatoxigenicity text was done using coconut extract agar and exposed to 365 nm ultra violet light. Data collected were analysed by one-way analysis of variance (ANOVA) at P < 0.05.Findings: The results showed maximum mean fungal load of smoke-dried fish of 9.54x105±1.83x106 cfu/g. Fungi associated with the smoked dried fish belong to five genera: Aspergillus, Penicillium, Candida, Acremonium and Rhizopus. Comparatively, the assessment showed that smoke-dried fish from old market were the most contaminated followed by samples from small market and modern markets. Aspergillus flavus had the highest prevalence of 32.88 %. Only strains of Aspergillus flavus gave positive to aflatoxins, out of the 24 Aspergillus flavus studied, only 25 % were positive to aflatoxins. Old market exhibited the highest of aflatoxin producing fungi.Unique contribution to theory, practice and policy: In view of this results, there is need to adopt hygienic practices during smoke dried fish processing and storage in Bida to avoid increase risk of aflatoxin poisoning.

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Separation and Characterization of Amine Drugs and Their Enantiomers by Capillary Column Gas Chromatography-Mass Spectrometry

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/66.6.1443 ◽

1983 ◽

Vol 66 (6) ◽

pp. 1443-1446

Author(s):

Ray H Liu ◽

Warren W Ku ◽

Mary P Fitzgerald

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Mass Spectrometer ◽

Capillary Column ◽

Gas Chromatography Mass Spectrometry ◽

Gas Chromatograph ◽

Capillary Column Gas Chromatography ◽

Spectrometer Data ◽

Amine Drug

Abstract A gas chromatograph-mass spectrometer-data system equipped with a capillary column is used to analyze commonly abused amine drug mixtures. Enantiomeric amines are analyzed as N-trifluoroacetyl- I-prolyl chloride derivatives. The 10 compounds included in this study are amphetamine, methamphetamine, norephedrine, ephedrine, 3,-4-methylenedioxyamphetamine, N,N-dimethyltryptamine, N,N-diethyltryptamine, N,N-dimethyl-5-methoxytryptamine, mescaline, and caffeine. All compounds, including possible enantiomers, are resolved and identified by the described method.

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Determination of volatile alcohols and acetone in serum by non-polar capillary gas chromatography after direct sample injection.

Clinical Chemistry ◽

10.1093/clinchem/30.10.1672 ◽

1984 ◽

Vol 30 (10) ◽

pp. 1672-1674 ◽

Cited By ~ 16

Author(s):

N B Smith

Keyword(s):

Gas Chromatography ◽

Capillary Gas Chromatography ◽

Capillary Column ◽

Internal Standard ◽

Fused Silica ◽

Gas Chromatograph ◽

Ionization Detector ◽

Flame Ionization ◽

Split Ratio

Abstract In this method for detection and quantification of volatile alcohols by capillary gas chromatography, the serum sample is deproteinized, then directly injected into the gas chromatograph with 1-propanol as the internal standard. The capillary column is a 30-m bonded methylsilicone-coated, fused-silica column. With helium as the carrier gas, the injector inlet is set at a split ratio of 1/30 and the average linear velocity in the column is 25 cm/s. Injector and flame-ionization detector temperatures are 280 degrees C, oven temperature 35 degrees C. Chromatography time is less than 3 min.

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Gas chromatography with ballistic heating and ultrafast cooling of column

Chemical Papers ◽

10.2478/s11696-008-0002-6 ◽

2008 ◽

Vol 62 (2) ◽

Author(s):

Žofia Krkošová ◽

Róbert Kubinec ◽

Helena Jurdáková ◽

Jaroslav Blaško ◽

Ivan Ostrovský ◽

...

Keyword(s):

Gas Chromatography ◽

Capillary Column ◽

Gas Chromatograph ◽

Good Separation ◽

Relative Retention ◽

External Cooling ◽

Peak Areas ◽

Fast Cooling ◽

Cooling Module ◽

Ultrafast Cooling

AbstractAn overview of the existing methods for minimization of the analysis time in gas chromatography (GC) is presented and a new system for fast temperature programming and very fast cooling down is evaluated. In this study, a system of coaxial tubes, a heating/cooling module (HC-M), was developed and studied with a capillary column placed inside the HC-M. The module itself was heated by a GC oven and cooled down by an external cooling medium. The HC-M was heated at rates of up to 330 °C min−1 and cooled at the rate of 6000 °C min−1. The GC system was prepared for the next run within a few seconds. The HC-M permits good separation reproducibility, comparable with that of a conventional GC, expressed in terms of relative retention times and peak areas of analytes reproducibilities. The HC-M can be used within any commercial gas chromatograph.

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