scholarly journals Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger

2015 ◽  
Vol 13 (3) ◽  
pp. 191-202 ◽  
Author(s):  
Slavica Blagojevic ◽  
Stevan Blagojevic ◽  
Biljana Begovic
Keyword(s):  
Maximum Concentration ◽  
Graphite Furnace ◽  
Microwave Digestion ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Human Consumption ◽  
Arsenic Content ◽  
Mineral Contents ◽  
Green Pepper ◽  
Black Cumin

In order to evaluate the safety of selected commercial spices brands, concentration of lead, mercury and arsenic, as well as moisture and mineral contents were analyzed in samples of dried black and white pepper powders, black, white and green peppercorns, black cumin seeds and ginger powder. Lead (Pb), mercury (Hg) and arsenic (As) concentrations in spice samples purchased from local markets in Belgrade were determined, after a microwave digestion of the samples, by atomic absorption spectrometry (AAS), using the graphite furnace AAS technique (Pb), cold vapor AAS technique (Hg) and hydride generation AAS technique (As). Trace levels of Pb, Hg and As in the selected dried spices samples were in the range 0.10 ppm - 0.79 ppm, 0.01 ppm - 0.10 ppm and 0.01 ppm - 0.51 ppm, respectively. The maximum Pb concentration was determined in the sample of ginger and it was 0.79 ppm, the maximum concentration of Hg was 0.10 ppm, determined in green peppercorns samples, while the maximum concentration of As in powdered black pepper sample was 0.51 ppm. The moisture and mineral contents in the different analyzed spices were in the range 1.70-13.10% and 3.40-6.50%, respectively. According to the obtained results, the concentrations of the analyzed toxic elements, as well as the moisture and mineral content in selected spices, were below the maximum permissible limits declared by the national legislations deemed safe for human consumption.

scholarly journals Quality and safety of some commercial spices brands

2013 ◽  
pp. 1-9 ◽  
Author(s):  
Slavica Blagojevic ◽  
Stevan Blagojevic ◽  
Natasa Pejic ◽  
Biljana Begovic ◽  
Spasenka Gajinov
Keyword(s):  
Heavy Metals ◽  
Graphite Furnace ◽  
Microwave Digestion ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Human Consumption ◽  
Quality And Safety ◽  
Sweet Basil ◽  
Graphite Furnace Aas

In this study, in order to evaluate the quality and safety of selected commercial spices brands, contents of moisture and minerals, as well as the concentration of certain heavy metals (As, Hg and Pb) were determined in oregano, sweet basil, parsley and celery. The spice samples were subjected to microwave digestion, and were analyzed by atomic absorption spectrometry (AAS), using hydride generation AAS technique, cold vapor AAS technique, and graphite furnace AAS technique for determination of As, Hg and Pb, respectively. Maximum concentrations of As and Pb were determined in the same brand sample of celery, and are 0.75 ppm and 0.40 ppm, respectively, while the maximum concentration of Hg in various brands sweet basil samples is 0.05 ppm. According to the results, the contents of moisture and minerals, as well as the concentrations of heavy metals in all selected spices were below the maximum permissible limits declared by the national legislations, and are safe for human consumption.

scholarly journals DETERMINATION OF ARSENIC CONTENT IN WASTEWATER-FED FISH POND IN HOANG MAI DISTRICT, HANOI, VIETNAM

2018 ◽  
Vol 54 (2A) ◽  
pp. 321
Author(s):  
Le Thai Ha
Keyword(s):  
Heavy Metals ◽  
Graphite Furnace ◽  
Arsenic Concentration ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Fish Pond ◽  
Human Consumption ◽  
Arsenic Content ◽  
Water Spinach ◽  
Gf Aas

Aquaculture in pond fed with wastewater has been practiced since the 1960s in Hoang Mai and Thanh Tri districts in Hanoi, Vietnam. Wastewater after directly discharged in to Kim Nguu and To Lich river is currently used for cultivation of vegetables and fishes. According to the previous studies, the content of some heavy metals in water and sediments from Kim Nguu and To Lich river exceeded the Vietnamese standard values. In this study, arsenic concentration in water, sediment, fish and plant collected from a wastewater fed-fish pond in Hoang Mai district, Ha Noi, Vietnam were determined by graphite furnace atomic absorption spectrometry (GF/AAS). Arsenic concentration in water collected from inlet and outlet sites of the pond were of 45.86 and 23.22 μg/L, respectively and those levels were higher than the Vietnamese standard. About 14% of arsenic entered the fish pond was in the suspended particulate mater (SPM) form. Arsenic concentration in the sediment ranged from 12.26 to 23.87 mg/kg (dry weight). The highest levels of arsenic found in the sediment near the pond outlet were probably caused by the movement of the sediment and heavy metals with the water flow. Based on the Vietnamese standards for agriculture soils, the studied pond sediment is not safe for crop application. Arsenic contents of 0.20 and 0.06 mg/kg (dry weight) were found in tissues of common carp and tilapia. The lower As contents in the outlet water in comparison to the inlet water showed that part of As was removed in the fish pond by different processes including the sedimentation and bio-adsorption. The As contents in the coarse stems/leaves of the water spinach samples were about 2.6 times higher than those in the shoot tips/younger leaves. As the findings, the water spinach and fish in this wastewater –fed fish pond were considered safe for human consumption with respect to arsenic content and Vietnamese standard.

scholarly journals Determination of Mineral, Trace Element, and Pesticide Levels in Honey Samples Originating from Different Regions of Malaysia Compared to Manuka Honey

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Mohammed Moniruzzaman ◽  
Muhammed Alamgir Zaman Chowdhury ◽  
Mohammad Abdur Rahman ◽  
Siti Amrah Sulaiman ◽  
Siew Hua Gan
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Pesticide Residues ◽  
Graphite Furnace ◽  
Microwave Digestion ◽  
Absorption Spectrometry ◽  
Emission Spectrometry ◽  
Mineral Contents ◽  
Flame Atomic Absorption

The present study was undertaken to determine the content of six minerals, five trace elements, and ten pesticide residues in honeys originating from different regions of Malaysia. Calcium (Ca), magnesium (Mg), iron (Fe), and zinc (Zn) were analyzed by flame atomic absorption spectrometry (FAAS), while sodium (Na) and potassium (K) were analyzed by flame emission spectrometry (FAES). Trace elements such as arsenic (As), lead (Pb), cadmium (Cd), copper (Cu), and cobalt (Co) were analyzed by graphite furnace atomic absorption spectrometry (GFAAS) following the microwave digestion of honey. High mineral contents were observed in the investigated honeys with K, Na, Ca, and Fe being the most abundant elements (mean concentrations of 1349.34, 236.80, 183.67, and 162.31 mg/kg, resp.). The concentrations of the trace elements were within the recommended limits, indicating that the honeys were of good quality. Principal component analysis reveals good discrimination between the different honey samples. The pesticide analysis for the presence of organophosphorus and carbamates was performed by high performance liquid chromatography (HPLC). No pesticide residues were detected in any of the investigated honey samples, indicating that the honeys were pure. Our study reveals that Malaysian honeys are rich sources of minerals with trace elements present within permissible limits and that they are free from pesticide contamination.

scholarly journals The use of L-ascorbic acid in speciation of arsenic compounds in drinking water

2009 ◽  
pp. 165-175 ◽  
Author(s):  
Aleksandar Stanic ◽  
Sasa Jovanic ◽  
Nikola Marjanovic ◽  
Zvonimir Suturovic
Keyword(s):  
Ascorbic Acid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Ph Value ◽  
Arsenic Speciation ◽  
Hydride Generation ◽  
Reaction Medium ◽  
Absorption Spectrometry ◽  
Arsenic Content ◽  
Arsonic Acid

Arsenic speciation, besides total arsenic content determination, is very important in analysis of water, foodstuffs, and environmental samples, because of varying degrees of toxicity of different species. For such purpose hydride generation atomic absorption spectrometry can be used based on the generation of certain types of hydride, depending on the pH value and pretreatment in different reaction media. In this study, we have investigated the effect of L-ascorbic acid as the reaction medium as well as the pre-reducing agent in speciation of arsenic by hydride generation-atomic absorption spectrometry in order to determine monomethyl arsonic acid (MMA) in the presence of inorganic forms of arsenic.

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