scholarly journals Cuantificación de metales pesados (Hg, As, Pb y Cr) en organismos acuáticos: cangrejo rojo (Ucides occidentalis) / Quantification of heavy metals (Hg, As, Pb and Cr) in aquatic organisms: red crab ( Ucides occidentalis )

Ciencia Unemi ◽  
2015 ◽  
Vol 8 (16) ◽  
pp. 54
Author(s):  
Humberto Ayala Armijos ◽  
Jhonny Perez Rodriguez ◽  
Cesar Quezada Abad ◽  
Alfonso Silva Ochoa ◽  
Liliana Cortez Suarez
Keyword(s):  
Heavy Metals ◽  
Soft Tissue ◽  
Atomic Absorption ◽  
Aquatic Organisms ◽  
Atomic Absorption Spectrophotometry ◽  
Average Concentration ◽  
Sampling Station ◽  
The European Union ◽  
Tissue Samples ◽  
Absorption Spectrophotometry

El objetivo de la presente investigación fue determinar, mediante Espectrofotometría de Absorción Atómica (AAS), la concentración de metales pesados (plomo, cromo, arsénico y mercurio) en tejido blando del cangrejo rojo (Ucides occidentalis). Las capturas se realizaron en cinco estaciones de muestreo a lo largo de las riberas del estero Huaylá, Machala, Ecuador, en octubre de 2014. Los especímenes se colocaron en fundas de polietileno y se refrigeraron hasta el momento del análisis, los tejidos se obtuvieron de la parte cefalotoráxica, de la cual se tomaron 2,5 g de muestras, estas se digirieron mediante oxidación húmeda para poder ser analizadas a través de AAS. Los resultados obtenidos reflejan que la mayor concentración promedio de plomo (Pb) en tejido blando de cangrejo rojo fue de 13,5 ± 0,45 mg.kg-1 en la estación de muestreo 3 y cromo (Cr) 8,84 ± 0,06 mg.kg-1 en la estación de muestreo 1. La concentración mayor de arsénico (As) fue de 33,59 ± 0,38 mg.kg-1 en la estación de muestreo 4 y mercurio (Hg) 142,54 ± 0,39 mg.kg-1 en la estación de muestreo 4. Por consiguiente, se concluyó que los contenidos de metales analizados superaron los límites máximos establecidos por la Unión Europea (2014) para este tipo de alimento, en todas las estaciones de muestreo. AbstractThe objective of this research was to determine by atomic absorption spectrophotometry (AAS), the concentration of heavy metals (lead, chromium, arsenic and mercury) in the soft tissue of the red crab (Ucides occidentalis). Catches were conducted in five sampling stations along the banks of the estuary Huayla, Machala, Ecuador, in October 2014. The specimens were placed in polyethylene bags and refrigerated until the time of analysis; 2.5 g of tissue samples from the cephalothorax was obtained and digested by wet oxidation to be analyzed by atomic absorption spectrophotometry. The results showed that the highest average concentration of lead (Pb) in soft tissue red crab was 13.5 ± 0.45 mg.kg-1 in the sampling station 3 and chromium (Cr) 8.84 ± 0, 06 mg.kg-1 in the sampling station 1. The highest concentration of arsenic (As) was 33.59 ± 0.38 mg.kg-1 in the sampling station 4 and mercury (Hg) 142.54 ± 0.39 mg.kg-1 in the sampling station 4. Therefore we conclude that in all sampling stations the content of heavy metals exceeds the ceilings set by the European Union (2014) for this type of food.

scholarly journals Analysis of Metal Copper Concentration at Candy using Atomic Absorption Spectrophotometry (AAS)

ALCHEMY ◽  
2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Eny Rahmawati ◽  
Diana Candra Dewi ◽  
Ahmad Ghanaim Fasya ◽  
Begum Fauziyah
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Key Words ◽  
Copper Concentration ◽  
Atomic Absorption Spectrophotometry ◽  
Average Concentration ◽  
Atomic Absorption Spectrophotometer ◽  
Time Stability ◽  
Absorption Spectrophotometry ◽  
The One

<p class="BodyAbstract">Candy sold in the market could be containing a heavy metals like copper. In this study, candy was destructed with HNO3, HNO3/H2SO4 (3:1) dan HNO3/H2SO4/H2O2 (6:2:1) to know the best matter oxidixer for copper. Then, evaluated the levels of copper using Atomic Absorption Spectrophotometer (AAS). The one way anove result with F test showed that the best oxidizer for copper in candy is HNO3/H2SO4. The average concentration of Copper in candy coded A, B, C, D, and E were 1. 72 mg/Kg; 1.69 mg/Kg; 1.57 mg/Kg; 1.71 mg/Kg; and 1.69 mg/Kg respectively. The content of copper in candies were the under daily dietary recommended limit based on SNI regulation.</p><p class="BodyAbstract"> </p><p class="BodyAbstract"><em><strong>Key Words:</strong> Atomic Absorption Spectrophotometry, candy, matter oxidizer, time stability, wet destruction</em></p><p class="BodyAbstract"><em> </em></p>

scholarly journals Kandungan Logam Berat Besi (Fe) Pada Air, Sedimen, Dan Kerang Hijau (Perna viridis) Di Perairan Tanjung Emas Semarang

2015 ◽  
Vol 18 (1) ◽  
Author(s):  
Endang Supriyantini ◽  
Hadi Endrawati
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Flow Velocity ◽  
Atomic Absorption ◽  
Key Words ◽  
Atomic Absorption Spectrophotometry ◽  
Pollution Level ◽  
Perna Viridis ◽  
Absorption Spectrophotometry ◽  
Living Organisms

Logam berat Fe merupakan logam berat essensial yang keberadaannya dalam jumlah tertentu sangat dibutuhkan oleh organisme hidup, namun dalam jumlah yang berlebih dapat menimbulkan efek racun.Penelitian ini bertujuan untuk menganalisis kandungan dan tingkat pencemaran logam berat Fe pada air, sedimen, dan kerang hijau (Perna viridis) di perairan Tanjung Emas Semarang. Penelitian ini dilaksanakan pada tanggal 7 November dan 7 Desember 2013 dengan metode penelitian deskriptif. Logam berat Fe dalam sampel air, sedimen dan kerang hijau dianalisis di Laboratorium Balai Besar Teknologi Pencegahan Pencemaran Industri (BTPPI) Semarang dengan menggunakan metode AAS (AtomicAbsorption Spectrophotometry). Hasil penelitian menunjukkan bahwa perairan Tanjung Emas masih dalam taraf terkontaminasi logam Fe. Sedangkan pada sedimen dan pada kerang hijau (Perna viridis) sudah terindikasi tercemar logam Fe.Meskipun demikian variasi faktor lingkungan seperti suhu, salinitas, pH, kecepatan arus dan jenis sedimen juga memberikan kontribusi yang cukup penting terhadap kandungan logam Fe.Kata Kunci: logam Fe, Air, Sedimen, Perna viridis, metode AAS Heavy metalsiron(Fe) is anessentialheavy metalswhose presencein a certain amountis neededby living organisms, but inexcessiveamountscan causetoxic effects.The aims of the research is to analyze the heavy metals coccentration and the pollution level of Fe in water, sediment, and green mussels (Perna viridis) at Tanjung Emas Semarang. This research was conducted from 7 November and 7 December 2013 using the Atomic Absorption Spectrophotometry (AAS) and research methodswithdescriptive. The results showed that the waters of the Tanjung Emas is still in the stage of heavy metals contaminated iron (Fe). Sediment and green mussels (Perna viridis)already indicated heavy metal contaminatediron. However, variations inenvironmental factorssuch astemperature, salinity, pH, flow velocity an dsediment types also providean important contributionto heavy metal contentof iron(Fe).Key Words: Fe, water, sediment, Perna viridis, metode AAS

scholarly journals Potential of Hyacinth Activated in Lowering Levels of Lead Heavy Metals by Method of Atomic Absorption Spectrophotometry

2021 ◽  
Vol 4 (2) ◽  
pp. 53-61
Author(s):  
Dita Kusuma Wardani ◽  
Tuti Alawiyah ◽  
Madschen Sia Mei Ol Siska Selvija Tambun
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Metal Levels ◽  
Lead Metal ◽  
Maximum Contact ◽  
Test Result ◽  
Made In

The Barito River as the largest and longest river in South Kalimantan has been convicted as the most polluted river on an international level. Where one of the most commonly found compounds is the heavy metal lead (Pb) with a high enough levels that alternatives are needed to reduce the levels of the metal. One way to reduce the levels of such heavy metals is to use activated carbon hyacinth. So the activated carbon from hyacinth is made in accordance with SII No.0258-79 and knows the effect of variations in the administration of activated carbon hyacinth at a time of 15 minutes, 30 minutes and 45 minutes in lowering the levels of lead heavy metals (Pb). The research method used to determine the effect of variations in the administration of activated carbon hyacinth is by quantitative testing using the Atomic Absorption Spectrophotometry tool. The results showed that activated carbon hyacinth has met SII No.0258-79 with a randemen test result of 15%, water content of 3%, and absorption of iodine of 241.16 mg / gram. Significant value produced 0.742 with regression value (r) 0.999 and resulted in decreased lead metal levels in the variation of 15 minutes activated carbon administration of -0.030 mg / l with an absorption of 120%, 30 minutes of 0.073 mg / l with an absorption of 48% and 45 minutes of -0.097 mg / l with an absorption of 167%. Hyacinth activated carbon can be used to lower the levels of lead heavy metals (Pb) with a maximum contact time of 45 minutes by 167%.

scholarly journals Lead and manganese accumulation on leaves of road side plants from Mauripor to Hawks Bay road, Karachi, Pakistan

2018 ◽  
Vol 44 (4) ◽  
pp. 665-668
Author(s):  
Mohammad Salam ◽  
Fareen Mohsin ◽  
Farzana Mahmood ◽  
Inayat Ur Rahman ◽  
Aftab Afzal ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Total Content ◽  
Atomic Absorption Spectrophotometry ◽  
Average Concentration ◽  
The Road ◽  
Absorption Spectrophotometry ◽  
Heavy Metals Accumulation ◽  
Conocarpus Erectus ◽  
Metals Accumulation ◽  
Roadside Plants

In order to investigate the heavy metals accumulation and their effects on roadside trees Conocarpus erectus. The total content of Pb and Mn was determined using atomic absorption spectrophotometry was conducted. Average concentration 10.578 ± 3.48 μg/gm of Pb and 91.98 ± 30.03 μg/gm of Mn was found. Moreover, there were variations in the level of both these heavy metals in different samples of Conocarpus tree that were collected from different locations along the road side due to different level of exposure to Pb and Mn. This physiological response of Conocarpus plant towards Pb and Mn suggests that roadside plants are good indicators of heavy metals accumulation and their subsequent effects on the environment.

scholarly journals ASSESSMENT OF SOME HEAVY METALS IN SOME CHOCOLATE BRANDS AND BREAD SOLD IN MAIDUGURI, BORNO STATE, NIGERIA

2020 ◽  
Vol 2 (4) ◽  
pp. 71-75
Author(s):  
A.I. Mohammed ◽  
A.A. Ahmed ◽  
T. Lot ◽  
M. Solomon
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Acid Digestion ◽  
Potential Health ◽  
Potential Health Risk ◽  
Absorption Spectrophotometry

Three brands of chocolate and five varieties of bread samples were collected and subjected to acid digestion for evaluation of some heavy metals (Cu, Cr, Pb, Fe, Cd and Zn) using atomic absorption spectrophotometry. The concentrations of the studied heavy metals in the chocolate brands were in the range 0.02-0.20; 0.02-0.10 and 0.09-0.20 mg/kg for Cd, Zn and Cr respectively. whereas Pb was not detected in the study. As per the bread samples, the concentrations ranged 0.05-0.13; 0.60-2.24, 0.30-0.06 and 0.02-0.10 mg/kg for Cd, Zn, Cr and Pb respectively. This study indicates that the concentrations of the studied brands of chocolate and bread are within the allowable limits hence pose no potential health risk or hazard upon consumption. Keywords: Chocolate, Concentrations, Spectrometry, Acid digestion

scholarly journals Cuantificación de metales pesados en Anadara tuberculosa(Mollusca:bivalvia) del estero Huaylá de Puerto Bolívar, por espectrofotometría de absorción atómica. // Quantification of heavy metals in Anadara tuberculosa, (Mollusca: bivalvia) from the Huaylá estuary of Puerto Bolívar, by atomic absorption spectrophotometry.

Ciencia Unemi ◽  
2017 ◽  
Vol 10 (24) ◽  
pp. 1
Author(s):  
Nancy Yadira Collaguazo ◽  
Humberto Ayala Armijos ◽  
Geanina Machuca Loja
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Bivalve Molluscs ◽  
Absorption Spectrophotometry ◽  
Commercial Importance ◽  
Permissible Limits ◽  
Limit Value

La presencia de metales pesados en moluscos bivalvos implica un grave problema para la salud de los consumidores de este tipo de alimento. Por ello, el objetivo de la investigación fue determinar la presencia de metales pesados enAnadara tuberculosa, moluscode importancia comercial en Puerto Bolívar, Ecuador. El método utilizado para cuantificar la concentración de metales pesados fue la  espectrofotometría de absorción atómica, se  determinó  la concentración de seis metales: Plomo (Pb), Arsénico (As), Mercurio (Hg), Cadmio (Cd), Cromo (Cr) y Cobalto (Co). Los valores promedios obtenidos, expresados en mg.kg-1 fueron: Pb (7,52 ± 0,46); As (1,55 ± 0,14); Hg (364,38 ± 91, 39); Cd (1,68 ± 0,28); Cr (3,89 ± 1,82) y Co (2,71 ± 0,34 en Anadara tuberculosa. Los resultados muestran que  el  Pb, As, Cd, y Hg superan  los límites máximos permisibles,  el Mercurio supera en más de 100 veces el valor límite. La talla más pequeña (3-4 cm) del molusco en estudio posee la capacidad de bioacumular mayor concentración de Pb, Cd y  Cr.ABSTRACTThe presence of heavy metals in bivalve molluscs implies a serious problem for the consumers health of this type of food. Therefore, the objective of the present investigation was to determine the presence of heavy metals in Anadara tuberculosa, mollusc of commercial importance at Puerto Bolívar, Ecuador. Atomic absorption spectrophotometry was the method used to quantify the concentration of heavy metals. The concentration of six metals was determined: lead (Pb), arsenic (As), mercury (Hg), cadmium (Cd), chromium (Cr) and cobalt (Co). The average values obtained, expressed in mg.kg-1 were: Pb (7.52 ± 0.46); As (1.55 ± 0.14); Hg (364.38 ± 91.39); Cd (1.68 ± 0.28); Cr (3,89 ± 1,82) and Co (2,71 ± 0,34 in A. tuberculosa The results show that Pb, As, Cd, and Hg exceed the maximum permissible limits, mercury exceeds by more than 100 times the limit value. The smaller size (3-4 cm) studied mollusc, has the capacity to bioaccumulate higher concentration of Pb, Cd and Cr.   

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