atomic absorption
Recently Published Documents


TOTAL DOCUMENTS

14611
(FIVE YEARS 794)

H-INDEX

113
(FIVE YEARS 12)

Author(s):  
Cristian Giertyas ◽  
Victor Silva ◽  
Maria de Oliveira ◽  
Emerson Freire ◽  
Josué Santos ◽  
...  

Two different gold-silica-based nanomaterials were prepared: (i) silica-supported gold nanoparticles (AuNP/SiO2); and (ii) gold-silica core-shell nanoparticles (AuNP@SiO2). Three strategies for sample treatment (S), consisting in acid treatments, were employed: (S1) HNO3; (S2) HNO3 + HCl; and (S3) HF + HNO3 + HCl, applying microwave oven digestion for S2 and S3. From three calibration curves, slope, intercept, and linear correlation coefficient were obtained. The accuracy of the methods was evaluated by comparing the gold contents in a sample determined by flame atomic absorption spectrometry (FAAS) and by inductively coupled plasma atomic emission spectrometry (ICP-OES). Finally, the amount of gold for all samples was determined by FAAS. UV-Vis spectroscopy and transmission electron microscopy (TEM) were used to compare the material before and after sample treatment. By comparison, the application of S2 and S3 allowed the presence of gold on or in the silica matrix to be determined and the amount quantified.


RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 611-625
Author(s):  
Said Tighadouini ◽  
Smaail Radi ◽  
Othmane Roby ◽  
Imad Hammoudan ◽  
Rafik Saddik ◽  
...  

The removal of heavy metals is attracting considerable attention due to their undesirable effects on the environment.


DEPIK ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 260-266
Author(s):  
Sayed Abdul Azis ◽  
Muhammad Irham ◽  
Sugianto Sugianto ◽  
Ichsan Setiawan ◽  
Amri Adnan

Heavy metal pollution is one of the problems that often occurs in Indonesian coastal waters. Comparative methods of looking at heavy metal content in coastal sediments include a way to show similarities and differences between one or more articles by using certain criteria. Different comparison methods to see the heavy metal content in sediments include the AAS (Atomic Absorption Spectrophotometer) method, AAN (Netron Activation Analysis), Regression, and USEPA methods. Based on the comparison of 2 methods, namely: AAS and AAN methods, the most efficient in analyzing heavy metals in sediments in coastal areas is the Atomic Absorption Spectrophotometry (AAS) method compared to the Neutron Activation Analysis (AAS) method.Keywords:CoastalSedimentHeavy MetalSpectrophotometer


Sign in / Sign up

Export Citation Format

Share Document