Characterization of waste. Microwave assisted digestion with hydrofluoric (HF), nitric (HNO3), and hydrochloric (HCl) acid mixture for subsequent determination of elements

2002 ◽  
Keyword(s):  
Acid Mixture ◽  
Microwave Assisted ◽  
Subsequent Determination ◽  
Microwave Assisted Digestion

Microwave-assisted digestion using diluted acids for toxic element determination in medicinal plants by ICP-MS in compliance with United States pharmacopeia requirements

2015 ◽  
Vol 7 (12) ◽  
pp. 5218-5225 ◽  
Author(s):  
Aline L. H. Muller ◽  
Edson I. Muller ◽  
Juliano S. Barin ◽  
Erico M. M. Flores
Keyword(s):  
Medicinal Plants ◽  
Toxic Element ◽  
Acid Solutions ◽  
Element Determination ◽  
Microwave Assisted ◽  
Icp Ms ◽  
Subsequent Determination ◽  
States Pharmacopeia ◽  
Microwave Assisted Digestion

Microwave-assisted digestion of medicinal plants using diluted acid solutions in closed vessels and subsequent determination of toxic elements.

Microwave-assisted digestion procedure for the determination of palladium in road dust

2002 ◽  
Vol 459 (2) ◽  
pp. 257-265 ◽  
Author(s):  
K. Boch ◽  
M. Schuster ◽  
G. Risse ◽  
M. Schwarzer
Keyword(s):  
Road Dust ◽  
Digestion Procedure ◽  
Microwave Assisted ◽  
Microwave Assisted Digestion

scholarly journals Inductively Coupled Plasma Collision Cell Quadrupole Mass Spectrometric Determination of Extractible Arsenic, Cadmium, Chromium, Lead, Mercury, and Other Elements in Food Using Microwave-Assisted Digestion: Results from an FDA Interlaboratory Study

2019 ◽  
Vol 102 (2) ◽  
pp. 590-604 ◽  
Author(s):  
Patrick J Gray ◽  
William Cunningham
Keyword(s):  
Inductively Coupled Plasma ◽  
Mass Spectrometric ◽  
Interlaboratory Study ◽  
Standard Reference Materials ◽  
Inductively Coupled ◽  
Microwave Assisted ◽  
Mass Spectrometric Determination ◽  
Microwave Assisted Digestion ◽  
Better Than

Abstract Background: An interlaboratory study was conducted to test U.S. Food and Drug Administration (FDA) Elemental Analysis Manual (EAM) Method 4.7, “Inductively Coupled Plasma-Mass Spectrometric Determination of Arsenic, Cadmium, Chromium, Lead, Mercury, and Other Elements in Food Using Microwave Assisted Digestion.” Objective: The goal of the study was to demonstrate the performance of FDA EAM Method 4.7. Methods: Fourteen laboratories participated in the collaborative study, including nine Food Emergency Response Network state laboratories and five federal FDA laboratories. Laboratories tested 8 labeled standard reference materials and 12 blinded foods: mayonnaise, dark chocolate, sunflowerseeds, hamburger with cheese, brown rice flour (blinded reference material included as a test food), infant formula, canned smoked oysters, sardines in tomato paste, swordfish, mineral water, cinnamon, and a multivitamin. The blinded test foods represented every sector of the AOAC food triangle. Participants measured the mass fraction of each element in each sample in triplicate. Results:Horwitz Ratio (HorRat) values were better than 1.5 for all As, Cd, Cu, Hg, Mo, Ni, Pb,and Se measurements when at least eight laboratories reported results greater than LOQ. The HorRat values were better than 1.5 for all Mn and Zn measurements except for the multivitamin and for all Cr measurements exceptfor sunflower seeds, in which the nonhomogeneity was identified. The average HorRat value of the blinded test foods was 0.66 for results greater than LOQ(n = 4206). Conclusions: The study showed that the method performed satisfactorily as a standard method for extractibleelemental analysis of food. Highlights: The method met or exceeded the performance expected.

scholarly journals Determination of Arsenic in Scalp Hair Samples from Exposed Subjects Using Microwave-Assisted Digestion With and Without Enrichment Based on Cloud Point Extraction by Electrothermal Atomic Absorption Spectrometry

2011 ◽  
Vol 94 (1) ◽  
pp. 293-299 ◽  
Author(s):  
Tasneem Gul Kazi ◽  
Jameel Ahmad Baig ◽  
Abdul Qadir Shah ◽  
Ghulam Abbas Kandhro ◽  
Sumaira Khan ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Cloud Point Extraction ◽  
Scalp Hair ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Microwave Assisted ◽  
Hair Samples ◽  
Triton X ◽  
Microwave Assisted Digestion

Abstract A simple and rapid cloud point extraction (CPE) procedure was applied for preconcentration of trace quantities of arsenic (As) in scalp hair samples. The samples were subjected to microwave-assisted digestion in a mixture of nitric acid and hydrogen peroxide (2 + 1, v/v) prior to preconcentration by CPE. The As in digested samples was complexed with ammonium pyrrolidine dithiocarbamate (APDC), and the resultant As-PDC complex was extracted by a nonionic surfactant, octylphenoxypolyethoxyethanol (Triton X-114). After centrifugation, the surfactant-rich phase was diluted with 0.1 M HNO3 in methanol and analyzed by electrothermal atomic absorption spectrometry. The experimental parameters, i.e., amount of APDC, concentration of Triton X-114, equilibrium temperature and time, were optimized. For validation of the proposed method, a certified reference material (CRM) of human hair (BCR 397) was used. No significant difference (P>0.05) was observed between the experimental results and certified values of the CRM (paired t-test). The LOD and LOQ obtained under the optimal conditions were 0.025 and 0.083 μg/kg, respectively. The developed method was applied for the determination of As in scalp hair samples from male and female subjects of two villages of Khairpur Mir's, Pakistan.

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