Determination of lead ions in fish and oyster samples using a nano-adsorbent of functionalized magnetic graphene oxide nanosheets-humic acid and the flame atomic absorption technique

2021 ◽  
Vol 193 (12) ◽  
Author(s):  
Manijeh Yekrangi ◽  
Ali Benvidi ◽  
Shahriar Jahanbani ◽  
Hamid R. Zare ◽  
Maryam Banaei
Keyword(s):  
Graphene Oxide ◽  
Humic Acid ◽  
Atomic Absorption ◽  
Graphene Oxide Nanosheets ◽  
Magnetic Graphene Oxide ◽  
Flame Atomic Absorption ◽  
Atomic Absorption Technique ◽  
Nano Adsorbent ◽  
Absorption Technique

Micromethod for Lead Determination in Whole Blood by Atomic Absorption, with Use of the Graphite Furnace

1975 ◽  
Vol 21 (4) ◽  
pp. 558-561 ◽  
Author(s):  
Frank J Fernandez
Keyword(s):  
Atomic Absorption ◽  
Whole Blood ◽  
Interlaboratory Comparison ◽  
Graphite Furnace ◽  
Sample Pretreatment ◽  
Lead In Blood ◽  
Scale Method ◽  
Flame Atomic Absorption ◽  
Atomic Absorption Technique ◽  
Absorption Technique

Abstract I describe a micro-scale method for determining lead in whole blood by utilizing a graphite furnace. Sample pretreatment consists of fivefold dilution with a dilute surfactant. The method is directly calibrated with lead standards prepared in dilute HNO3. To eliminate a small, nonspecific absorption signal from the blood matrix, simultaneous background correction is used. Interlaboratory comparison with a flame atomic absorption technique that requires extraction yielded high correlation (r = 0.98). Within-run precision (coefficient of variation) ranged from 2 to 4%. Lead in blood can be accurately measured in as little as 20 µl of blood, hence the method is suitable for routine laboratory use and for pediatric screening.

The Determination of Barium and Antimony in Gunshot Residue by Flameless Atomic Absorption Spectroscopy Using a Tantalum Strip Atomizer

1975 ◽  
Vol 29 (1) ◽  
pp. 44-48 ◽  
Author(s):  
J. A. Goleb ◽  
C. R. Midkiff
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectroscopy ◽  
Acid Leaching ◽  
Gunshot Residue ◽  
Relative Deviation ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Atomic Absorption Technique ◽  
Absorption Technique

A flameless atomic absorption technique, employing a tantalum strip atomizer, has been developed to determine barium and antimony in gunshot residue. Cotton swabs, wetted with 5% HNO3, are used to collect residue. Barium and antimony are released from the swabs by acid leaching or plasma ashing. Both techniques give good recoveries; the ashing technique is preferred for blood-stained swabs. The sensitivity for barium is 0.1 ng/10 µl and antimony 0.2 ng/10 µl. At nanogram levels the standard relative deviation for barium is 8.3% and for antimony 8.5%.

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