scholarly journals Quantification of Heavy Metals and Pesticide Residues in Widely Consumed Nigerian Food Crops Using Atomic Absorption Spectroscopy (AAS) and Gas Chromatography (GC)

Toxins ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 870
Author(s):  
Kingsley O. Omeje ◽  
Benjamin O. Ezema ◽  
Finbarr Okonkwo ◽  
Nnenna C. Onyishi ◽  
Juliet Ozioko ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Gas Chromatography ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Pesticide Residues ◽  
Food Crops ◽  
Gradual Decline ◽  
Fluted Pumpkin ◽  
Permissible Limits

More still needs to be learned regards the relative contamination of heavy metals and pesticide residues, particularly those found in widely consumed Nigerian food crops like cereals, vegetables, and tubers. In this current study, the heavy metals and pesticide residues detectable in widely consumed Nigerian food crops were respectively quantified using atomic absorption spectroscopy (AAS) and gas chromatography (GC). Specifically, the widely consumed Nigerian food crops included cereals (rice, millet, and maize), legume (soybean), tubers (yam and cassava), as well as leaf (fluted pumpkin, Amaranthus leaf, waterleaf, and scent leaf) and fruit vegetables (okro, cucumber, carrot, and watermelon). Results showed that the detected heavy metals included arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), iron (Fe), lead (Pb), manganese (Mn), mercury (Hg), and nickel (Ni), whereas the pesticide residues included Aldrin, Carbofuran, g-chlordane, Chlorpyrifos, DichloroBiphenyl, Dichlorodiphenyldichloroethane (DDD), Dichlorodiphenyltrichloroethane (DDT), Dichlorvos, Endosulfan, Heptachlor, Hexachlorobenzene (HCB), Isopropylamine, Lindane, t-nonachlor, and Profenofos. Across the studied food crops, the concentrations of heavy metals and pesticides were varied, with different trends as they largely fell below the established maximum permissible limits, and with some exceptions. Our findings suggest there could be a somewhat gradual decline in the concentration of the heavy metals and pesticide residues of these studied food crops when compared to previously published reports specific to Nigeria. To help substantiate this observation and supplement existing information, further investigations are required into the concentration of these heavy metals and pesticide residues specific to these studied food crops at other parts of the country.

scholarly journals Determination of heavy metals and pesticide residues level in selected sundried and smoked vegetables from Aizawl market

2017 ◽  
Vol 17 (4) ◽  
pp. 197-203
Author(s):  
C. Malsawmtluangi ◽  
B. Lalzamliana ◽  
Klaudi K. Vaiphei
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Gas Chromatography ◽  
Atomic Absorption Spectroscopy ◽  
Pesticide Residues ◽  
High Rate ◽  
Predisposing Factor ◽  
Vegetable Samples ◽  
Permissible Limits

Sundried and smoked vegetables constitute major parts of the Mizo cuisine. Heavy metals and pesticides can be present in vegetables and cause many diseases including cancer. The objective of this study is to determine the concentration of heavy metal and pesticide residues in commonly consumed sundried and smoked vegetables from Aizawl market. Since cancer is prevailing at a high rate in Mizoram, it also aims to study whether there is any link between cancer and these vegetables. The concentrations of heavy metals were analyzed using atomic absorption spectroscopy and pesticide residues levels were analyzed using gas chromatography. This study reveals that the levels of heavy metals tested were within the permissible limits in all the vegetable samples, except for cadmium. Since cadmium exceeds the permissible limit, it can pose health risk for the consumers. The pesticide residues found in the tested samples were all within permissible limits. However, the amount and duration of consumption need to be considered as this can be a predisposing factor for cancer and other diseases.

scholarly journals Evaluation of the Heavy Metals in Tonic Creams using the Wet Acid and Dry Ashing Methods

2019 ◽  
pp. 37-43
Author(s):  
Emmanuel Orimisan Abata ◽  
Oluwasanmi Damilola Ogunkalu ◽  
Adewale Abdulahi Adeoba ◽  
Olugbenga Oludayo Oluwasina
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Wet Digestion ◽  
Permissible Limits ◽  
Behavioral Abnormalities ◽  
Dry Ashing ◽  
Ondo State

It has recently been discovered that long term exposure to heavy metals such as mercury (Hg), lead (Pb), cadmium (Cd), and nickel (Ni) causes some health which are carcinogenic, behavioral abnormalities and sterility. This study is aimed at determining the concentration of Pb, Cd, Zn, Mn, Cr, Cu and Ni in skin cosmetics, particularly in toning creams. Samples were purchased from Oja-Oba market in Akure City of Ondo state, Nigeria. All the heavy metals under study were quantified using atomic absorption spectroscopy (AAS) after wet digestion and dry ashing methods. The following metals were found through wet digestion, Cu (3.90-12.05), Zn (3.50-7.10), Mn (9.90-12.50), Cd (0.00-0.35), Ni (1.05-2.25), Pb (0.10-1.80) and Cr (0.6-4.1) while dry ashing recorded, Cu (7.15-10.70), Zn (6.40-13.85), Mn (10.60-14.90), Cd (0.35-0.55), Ni (3.40-4.70), Pb (0.30-0.55) and Cr (0.85-1.00) mg/kg. It was observed that the concentrations of those metals in the creams investigated were below the maximum permissible limits set by WHO. Significant differences (p < 0.05) of the levels of heavy metals were found between some of the creams posing risks of a combination of creams as well as continual usage. It is, therefore, necessary to indicate the levels of heavy metals on the labels of these cosmetics so the users can be aware.

scholarly journals STRUKTUR POPULASI DAN KANDUNGAN LOGAM BERAT PADA GASTROPODA (Telescopium telescopium) DI KAWASAN MANGROVE TAMAN NASIONAL RAWA AOPA WATUMOHAI

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Gusni Sri Ningsih ◽  
Analuddin Kangkuso ◽  
Nasaruddin Nasaruddin
Keyword(s):  
Heavy Metals ◽  
Population Structure ◽  
Atomic Absorption ◽  
Size Distribution ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Sea Water ◽  
Quality Standard ◽  
Sampling Location ◽  
Number Of Individuals

ABSTRAKPenelitian ini bertujuan untuk mengetahui struktur populasi dan kandungan logam berat gastropoda (Telescopium telescopium) di Taman Nasional Rawa Aopa Watumohai. Penelitian ini dilaksanakan pada bulan Januari sampai Maret 2018. Lokasi pengambilan sampel penelitian terletak pada mangrove yang tumbuh di Sungai Lanowulu dan Roraya di TNRAW. Penelitian ini menggunakan metode purposive sampel. Penelitian ini menggunakan plot kuadrat ukuran 1 m2 diletakkan di setiap stasiun. Jumlah individu dari T. telescopium dihitung berat dan panjangnya. Selain itu, kandungan logam berat Timbal (Pb) dan Cadmium (Cd) di dalam daging T. telescopium dihitung menggunakan Atomic Absorption Spectroscopy (AAS) di Laboratorium Fakultas Perikanan dan Ilmu Kelautan Universitas Halu Oleo. Struktur populasi T. telescopium ditentukan dengan analisis histogram, distribusi ukurannya ditentukan dengan analisis koefisien variasi (CV). Hasil penelitian menunjukkan struktur populasi gastropoda membentuk kurva normal dengan ukuran kecil. Kandungan logam Pb dan Cd di dalam sedimen dan air laut dari Sungai Roraya lebih tinggi secara signifikan dibandingkan dengan Sungai Lanowulu, disisi lain, kandungan logam berat Pb dan Cd dalam daging T. telescopium tidak berbeda signifikan. Dengan demikian, kandungan logam berat Pb dan Cd pada air laut, sedimen dan daging T. telescopium di sungai Lanowulu dan sungai Roraya berada di atas baku mutu sesuai dengan Kepmen LH. No. 51. 2004. Kata kunci: Gastropoda, Mangrove, Logam Berat, TNRAW. ABSTRACTThis study aims todetermine the population structure and heavy metals contents of gastropods (Telescopiumtelescopium) living in RawaAopaWatumohai National RAWN Park. This research was conducted from January until March 2018. The sampling location of research was in mangroves grown along the Lanowulu and Roraya rives at RAWN Park. This research uses purposive sampling method.  This study used the plot quadrate of 1 m2 widethat placed in each station. The number of individuals of.T. telecopium was counted, while their fresh weight and length of T.telescopiumwere measured. In addition, the content of heavy metals of Lead (Pb) and Cadmium (Cd) into meat of T. telescopium were measured by using Atomic Absorption spectroscopy (AAS) in Laboratory at Faculty of Fisheries andMarine Science at Halu Oleo University. The population structure of T. telescopium was determined by histrogram analysis, its size distribution was determined by coefficient of variation (CV) analysis. The results showed that population structure of gastropods was normal curve with small ranges of size distribution. The content of Pb and Cd into sediment and sea water of Rorayariver were significantly higher as compared than that in Lanowulu river. On the other hand, the content of heavy metals Pb and Cd into meat of T. telescopium was not significantly different. However, the heavy metals contents of Pb and Cd into sea water, sediment and meat of T. telescopiumboth in Lanowuluand Roraya riverswere above the quality standard according to Ministry of Environment No. 51/LH/2004. Keywords : Gastropods, mangroves, Lanowulu and Roraya rivers, heavy metals, Rawa Aopa Watumohai National Park

scholarly journals Research of the Content of Heavy Metals in the Atmospheric Precipitation of the Geygel, Dashkesan and Gedabek Districts of Azerbaijan

2021 ◽  
Vol 7 (6) ◽  
Author(s):  
Sh. Nuguyeva ◽  
E. Mammadov
Keyword(s):  
Heavy Metals ◽  
Neutron Activation ◽  
Atmospheric Deposition ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Epithermal Neutron ◽  
Atmospheric Precipitation ◽  
Nuclear Research ◽  
Atmospheric Air

The increasing content of heavy metals in soil and atmospheric air can lead to serious consequences in the final link of which a person is. To determine heavy metals in atmospheric deposition, the method of biomonitoring of mosses was used. Joint Institute for Nuclear Research scientists started the implementation of the mosses biomonitoring methodology in Azerbaijan 2015. In total, the concentration was determined for 44 elements. Determinations were performed using instrumental analysis of Epithermal Neutron Activation and Atomic Absorption Spectroscopy in 85 moss samples. The species of moss used in the work was Pleurosium schreberi. Based on the analysis results, the most contaminated areas are identified.

scholarly journals Trace and Essential Elements Analysis inCymbopogon citratus(DC.) Stapf Samples by Graphite Furnace-Atomic Absorption Spectroscopy and Its Health Concern

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Jasha Momo H. Anal
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Graphite Furnace ◽  
Essential Elements ◽  
Health Concern ◽  
Permissible Limits ◽  
Daily Diet ◽  
Graphite Furnace Atomic Absorption ◽  
Gf Aas

Cymbopogon citratus(DC.) Stapf commonly known as lemon grass is used extensively as green tea and even as herbal tea ingredient across the world. Plants have the ability to uptake metals as nutrient from the soil and its environment which are so essential for their physiological and biochemical growth. Concentrations of these twelve trace elements, namely, Mg, Ca, Cr, Mn, Fe, Ni, Cu, Zn, Mo, As, Cd, and Pb, are analysed by graphite furnace-atomic absorption spectroscopy (GF-AAS) and are compared with the permissible limits of FAO/WHO, ICMR, and NIH, USA, which are found to be within permissible limits. Toxic metals like As, Cd, and Pb, analysed are within the tolerable daily diet limit and at low concentration.

scholarly journals Analysis of Ambroxol Hydrochloride in Flavamed® Tablets by Means of Spectroscopic Absorption Methods

2016 ◽  
Vol 13 (1-2) ◽  
Author(s):  
Dijana Jelić ◽  
Saida Fazlagić ◽  
Vesna Antunović ◽  
Nataša Bubić-Pajić ◽  
Anđelka Račić ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Quantitative Analysis ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Active Component ◽  
Drug Analysis ◽  
Spectrophotometric Methods ◽  
Synthetic Derivative ◽  
Ambroxol Hydrochloride

Ambroxol hydrochloride (AMB), (1s,4s)-4-((2-amino-3,5-dibromocyclohexyl)methylamino) cyclohexanol hydrochloride, is semi - synthetic derivative of vasicine obtained from Indian shrub Adhatoda vasica. It is a metabolic product of bromhexin and it is used as broncho secretolytic and an expectorant drug. Analysis of Flavamed® tablets, in which ambroxol hydrochloride (AMB) is an active component, was performed. UV/VIS spectrophotometry and atomic absorption spectroscopy (AAS) were used. Direct and indirect UV/VIS spectrophotometric methods were used for quantitative analysis of AMB and the following recovery value results were obtained: 100,16% and 95,23%, successively. Content of heavy metals in Flavamed® tablets was determined by atomic absorption spetroscopy.

Schwermetalle in höheren Pilzen, IV * Silber / Heavy Metals in Higher Fungi, IV Silver

1978 ◽  
Vol 33 (9-10) ◽  
pp. 608-615 ◽  
Author(s):  
Johannes A. Schmitt ◽  
Hans-Ulrich Meisch ◽  
Wolfgang Reinle
Keyword(s):  
Heavy Metals ◽  
Trace Metal ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Dry Matter ◽  
Silver Content ◽  
The Other

Abstract In several series of 581 samples, Higher Fungi, especially from the Boletales and Gasteromy­cetes, were analyzed by atomic absorption spectroscopy on their content of the trace metal silver. The highest Ag-content was found in the Lycoperdales (max. 50 mg/kg dry matter) and in some species of the genus Boletus (max. 15 mg Ag/kg). The other fungi tested showed a mean silver content of 1 mg/kg or lower. The species with the highest amounts of the trace metal were found to enrich silver 300 fold compared to the substrate.

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