Comparison of Acid Mixtures Using Conventional Wet Digestion Methods for Determination of Heavy Metals in Fish Tissues

2015 ◽  
Vol 8 (7) ◽  
pp. 1-9 ◽  
Author(s):  
Fabunmi Idera ◽  
Olumodeji Omotola ◽  
Adeleye Adedayo ◽  
Uyimadu Paul
Keyword(s):  
Heavy Metals ◽  
Fish Tissues ◽  
Wet Digestion ◽  
Digestion Methods

scholarly journals Determination of the Levels of Heavy Metals and Formaldehyde in Baby Clothes in South Africa: A Case Study of Stores in the Greater Cape Town Region

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
P. Nyamukamba ◽  
C. Bantom ◽  
Z. Mququ ◽  
T. Ngcobo ◽  
S. Isaacs
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Formaldehyde Concentration ◽  
Inductively Coupled ◽  
Wet Digestion ◽  
Skin Contact ◽  
Relative Standard ◽  
Artificial Sweat

Herein, we report on the determination of formaldehyde, pH, and heavy metals (Pb, As, Co, Cr, Ni, and Cd) in various baby apparel (cotton, polyester, nylon, elastane, and polyethylene) of different colours (light, medium, and dark) purchased from both high-end and low-end market stores. The concentrations of the heavy metals were determined by inductively coupled plasma (ICP) after wet digestion and also after extraction using artificial sweat for a selected range of skin-contact baby apparel. The relative standard deviation for the determination of all heavy metals was less than 5% except for nickel which was 10.49%. The concentrations of the heavy metals in wet digested samples were found to be in the following range: Pb (0.02–23.662 mg/kg), As (0.009–0.033 mg/kg), Co (0.001–1.053 mg/kg), Cr (0.053–6.373 mg/kg), Ni (0.039–36.715 mg/kg), and Cd (0.001–0.914 mg/kg), whereas the concentrations in artificial sweat extracted samples were in the following range: Pb (0.006–1.658 mg/kg), As (not detected), Co (0.001–1.05 mg/kg), Cr (0.112–0.371 mg/kg), Ni (0.062–0.121 mg/kg), and Cd (0.001–0.018 mg/kg). The highest concentrations of Pb, Cr, and Co after wet digestion were found in baby apparel purchased from low-end market stores, whereas for As, Ni, and Cd were from high-end market stores. All the samples had a formaldehyde concentration within the acceptable limits recommended by Oeko-Tex. Out of the thirty-four samples analysed, fifteen samples were found to have a pH higher than Oeko-Tex limits. The pH values for the samples that exceeded the Oeko-Tex limits were in the alkali region, and the highest was 11.31 which exceeded by 3.81.

Rapid and Simple Determination of Heavy Metals in Foods-Application of Wet Digestion and Iodide-MIBK Extraction

1983 ◽  
Vol 24 (3) ◽  
pp. 295-300_1 ◽  
Author(s):  
Isao SAITO ◽  
Norihisa KAWAMURA ◽  
Shoichi ARAKAWA ◽  
Harumi OSHIMA ◽  
Keiichi UNO
Keyword(s):  
Heavy Metals ◽  
Wet Digestion

Determination of Contaminated Heavy Metals in Lacquer Thinner

2018 ◽  
Vol 879 ◽  
pp. 144-148
Author(s):  
Woravith Chansuvarn ◽  
Kunawoot Jainae
Keyword(s):  
Heavy Metals ◽  
Trace Metals ◽  
Absorption Spectrometry ◽  
High Concentration ◽  
X Ray ◽  
Wet Digestion ◽  
Clear Solution ◽  
Cu And Zn

The aim of this work needed to discover the problem of lacquer thinner products claimed with dissatisfying the quality of coating and color appearance. The trace metals produced cans was focused on release to solvents. The contaminated trace metals including Fe, Sn, Cu, and Zn in lacquer thinner were also determined by atomic absorption spectrometry (AAS). The lacquer thinner samples were simply carbonized to be ashes by furnace muffle at 550°C for 8 hours. The carbonized ashes were then also digested by conventional wet digestion with concentrated nitric acid until a clear solution was archived. Twenty samples of lacquer thinner were achieved from the paint manufacturer. The content of Fe, Sn, Cu, and Zn was found in the range of 0.0631-77.190 mg/kg, ND-12.613 mg/kg, ND-1.4679 mg/kg, and ND-0.4028 mg/kg, respectively. The result of high concentration of Fe related to the appearance of lacquer thinner color. The evidence of released heavy metals in the ashes of lacquer thinner samples was evaluated by X-ray fluorescence technique. The result of this work was concluded that the contaminated trace metals in the suspected lacquer thinner samples were leached from the metallic package.

scholarly journals Determination of heavy metals in the soils of tea plantations and in fresh and processed tea leaves: an evaluation of six digestion methods

2016 ◽  
Vol 10 (1) ◽  
Author(s):  
Md. Harunur Rashid ◽  
Zeenath Fardous ◽  
M. Alamgir Zaman Chowdhury ◽  
Md. Khorshed Alam ◽  
Md. Latiful Bari ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Tea Leaves ◽  
Tea Plantations ◽  
Digestion Methods
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