Research Papers/Topics in Analytical Chemistry

Chemometric Analysis,Speciation And Remediation Of Potentially Toxic Metals In The Sediments Of The Lagos Lagoon System

ABSTRACT The Lagos lagoon system is the main water body in Lagos State and it is highly polluted. It receives enormous amount of domestic and industrial wastes from rivers and creeks. In this study, three main Lagos trans-urban streams Odo-lyaalaro, Shasha and Ibeshe creeks that empty into the Lagos Lagoon were examined. For the study, samples were collected bimonthly for a year and the physicochemical properties of both the water and sediments were determined. The pseudototal heavy ...

A Novel Biosenser For Hydrogen Peroxide Based On Horseradish Peroxidase Immobilised On A Zinc Oxidemultiwalled Carbon Nanotube Composite

ABSTRACT A novel biosensor for hydrogen peroxide was constructed based on the immobilization of horseradish peroxidase on zinc oxide-multiwalled carbon nanotubes matrix. The model redox enzyme, horseradish peroxidase (HRP) was physically (physical adsorption) immobilized on the ZnO/MWCNT modified electrode surface. UV-Visible spectra of HRP and HRP/ZnO/MWCNT displayed soret bands at 407 and 390 nm, respectively and thus the immobilised HRP retains its native structure. The modified elec...

Studies On The Assessment And Simulation Of Dietary And Environmental Exposures To Polycyclic Aromatic Hydrocarbons In Complex Matrices

ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) are known for their carcinogenic and mutagenic properties. They are formed from incomplete combustion of organics such as fossil fuels among others. PAHs are found in foods and in the environment. In this study, the concentration of PAHs and their potential risks were determined in smoked fishes, roasted foods, soils and plant samples in the Lagos metropolis, Nigeria. Smoked and raw fishes (Arius heude loti (catfish), Cynoglossus senegalen...

Trace Metals In Soil Around Girl Farmlands

ABSTRACTThis work was aimed at determining the concentration of four trace metals: cobalt, copper,nickel and zinc in soil. Samples were collected from both cultivated and uncultivatedfarmlands in Giri.The results obtained showed that the concentrations of cobalt, copper, nickel and zincin cultivated lands are 0. 138ppm, 0. 134ppm, 0. 126ppm and 0.224ppm respectively. And theconcentrations in uncultivated lands are 0. 112ppm, 0. 126ppm, 0.262ppm and 0.224ppm forcobalt, copper, nickel and zinc ...

Trace Heavy 'Metals In Fish And Sediments Or Some Rivers Around Industrial Areas Of The Kaduna River Basin

ABSTRACTThe level of Cd, Co, Cu, Mn, Ni, Pb and Zn in fish and sediments of Riverswithin the Kaduna South Jndustrial Zone were determined by flam e atomicabsorption spectrophotometry. The HN03 - I-1202 digestion.... s ystem was usedto digest the fish sample far trace m etals det ermination. Tire HN03 - H202digestion method gave good recoveries which vCiries within 80-95 % forCd, 85-97% for Co, 81-99% for Cu, 79-97% for Mn, 81-93% for Ni, 87-98% for Pb Clnd 77 - 98% for Zn in a fish smnple. Th...

The DETERMINATION Of Selected Metal ELEMENTS IN AGRICULTURAL SOILS FROM THREE AREA COUNCILS OF THE FEDERAL CAPITAL TERRITORY (FCT), ABUJA, NIGERIA USING ATOMIC ABSORJ)TION SPECTROPI-IOTOMETR

ABSTRACTCo111positc soil samples were collected rnmlomly within Gwagwul8da, Kujcami Kw;di 1\rt.:n Councils or the Federal Capit:d Territory (FCT), /\buja. Thesarnpks were mwlyscd lr pH. percentage organic mutter, exchat1gcablc bases,cxchallgcahlc acidity. c!Tective cntion cxclwngc cnpacity (I􀛺CEC), perccnt;1gc basesaluratioll, available lllclal clclllclltS, the toltd levels or COIICl'lltratiollS of the lllCtalclclllCiltS. chcrnical IJ·actiOIIS of 11lallgallCSC, LillC

Heavy Metals In Vegetables Sampled From Farm And Market Sites In Accra Metropolis, Ghana

ABSTRACT This study reports for the first time in Ghana long-term monitoring of heavy metal contamination of vegetables. As reliable residue data analysis resulting from monitoring programs in foods is of great value to the general populace; this could address the possible risk of heavy metal exposure to human health. In this study, monitoring of heavy metals (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in consumable vegetables was assessed for a period of 2 years, 2013-2014. In all, a to...

PHYSICOCHEMICAL PROPERTIES OF STARCHES OF SOME TROPICAL TUBERS

ABSTRACTThe starches of corms and cormels of red and white cocoyam (Colocasia esculenta) varieties, cassava (Manihot esculenta), sweet potato (Ipomea batata), bitter yam (Dioscorea dumentorum) and water yam (Dioscorea alata) were extracted. Their proximate compositions, physicochemical properties, mineral compositions and antinutrient contents were analyzed. The results of the proximate analysis (pWCCM (corms of white cocoyam)>WYAM>SPOTA>WCCL >RCCL (cormels of red cocoyam)>CASS. The darkest s...

Effective Parameters Which Enhance Soil Remediation After Oil Spillage

ABSTRACT The efficiency of oil remediation of crude oil contaminated soils was analyzed in this work. Factors such as (a) volume of oil spilled, (b) volume of detergent used (c) weight of soil and (d) contact time between oil and soil were isolated for their effect on efficiency. The result shows that the efficiency of remediation by detergent leaching of soil is a function of the following parameters, volume of detergent used, weight of s...

SYNTHESIS AND 1HNMR CHARACTERIZATION OF Co(II) AND Fe(II) COMPLEXES OF MIXED SCHIFF BASE LIGAND DERIVED FROM SALICYLALDEHYDE AND 2-HYDROXY-1-NAPHTHALDEHYDE WITH 2-AMINOPHENOL

 SYNTHESIS AND 1HNMR CHARACTERIZATION OF Co(II) AND Fe(II) COMPLEXES OF MIXED SCHIFF BASE LIGAND DERIVED FROM SALICYLALDEHYDE AND 2-HYDROXY-1-NAPHTHALDEHYDE WITH 2-AMINOPHENOL A RESEARCH PROJECTBY NKEMJIKA, EMMANUEL EKE12/SC/CH/256 SUBMITTED TO DEPARTMENT OF CHEMISTRYFACULTY OF SCIENCEUNIVERSITY OF UYO, UYOAKWA IBOM STATE   IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF BACHELOR OF SCIENCE (B.Sc.) DEGREE IN CHEMISTRY  &...

Comparative Study on the Influence of Grilling Height on the Concentration of Polycyclic Aromatic Hydrocarbons (PAHS) and Some Toxic Metals in Grilled Foods

Abstract:A comparative study was carried out on the effect of grilling height on the extent of accumulation of the 16 US EPA priority PAHs and some volatile (As and Hg) and non-volatile (Mn, Cu, Pb, Cr, Cd and Ni) heavy metals in two kinds of roasted foods; yam (Dioscorea Rotundata ) and plantain (Musa Paradisiaca) commonly consumed in Nigeria. Yam and two variants of plantain (unripe and ripe) were considered for this study. Two grilling heights (10 cm and 20 cm) were employed on each of ...

Impact of Cooking Methods on the Levels of Polycyclic Aromatic Hydrocarbons (PAHs) in Chicken Meat

Abstract: This study investigated the presence of polycyclic aromatic hydrocarbons (PAHs) in the different cooking methods of chicken. The levels of 16 PAHs compound were determined in raw and cooked chicken meats. The chicken was cooked with different methods, i.e. boiling, frying, barbequing and roasting. The uncooked sample served as the reference. With the aid of the 16 PAHs reference standards, the levels of the PAHs were determined using gas chromatography - flame ionization detecto...

Assessment of Surface Water Contamination and Effect of Textile Effluents on Ibeshe River, Ikorodu, Lagos State, Nigeria

ABSTRACT An increased concern in recent times has been the effect of industrial effluent discharge into the water bodies. Surface water samples of Ibeshe River were studied to find out the pollution load of wastewater generated from the textile industry and its impact on the quality of the receiving river. Water samples were collected at four (4) different points for each of the three (3) steam divisions (the upstream, the midstream and the downstream) bimonthly within one year; 3 months ...

Impact of Textile Wastewater on Whole Plants of Corchorous olitorius, Telfairia occidentalis, Celosia argentea and Amaranthus hybridus Cultivated within Farmlands in Ibeshe, Ikorodu, Lagos St

Abstract Soil contamination with heavy metal due to discharge of untreated or incompletely treated industrial effluent is a threat to the ecosystem and human well-being. The effect of textile waste effluent on four vegetable plants (Corchorous olitorius, Telfairia occidentalis, Celosia argentea and Amaranthus hybridus) cultivated within farmlands located along the Abuja River in Ibeshe town near Ikorodu, Lagos State was investigated. Their heavy metal levels were determined using atomic a...

Essential Oils and Fatty Acids Composition of Dry Fruits of Tetrapleura tetraptera

ABSTRACT: The composition of essential oil and fatty acids of dry fruits of Tetrapleura tetraptera were analyzed by GC/MS. Forty-four compounds representing 98.5% of the essential oil were characterized. The essential oil was dominated by acetic acid (34.59%), 2-hydroxy-3- butanone (18.25%), butanoic acid (8.35%), 2-methyl butanoic acid (7.58%), 2-methyl butanol (7.45%), butanol (4.30%), 2-methyl butenoic acid (3.65%) and Nerol (3.25%). The fatty acid was dominated by palmitic acid (49.4...


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