Lead in the Bones of Prehistoric Lead-glaze Potters

1964 ◽  
Vol 30 (1) ◽  
pp. 94-96 ◽  
Author(s):  
Saul Jarcho
Keyword(s):  
Atomic Absorption ◽  
Lead Poisoning ◽  
Atomic Absorption Spectrophotometry ◽  
Experimental Series ◽  
X Ray Diffraction ◽  
Control Series ◽  
X Ray ◽  
Absorption Spectrophotometry ◽  
Lead Glaze

AbstractIn 1932 Haury described lead-glaze pottery from the Southwest. In view of his report, it appeared desirable to find out whether the makers of such pottery suffered from lead poisoning. A series of 46 bone specimens from Kinishba, where lead-glaze pottery was made, and a control series of 33 specimens from Point of Pines, where such pottery is not known to have been made, were screened by X-ray and by X-ray diffraction. The 11 most promising specimens were then analyzed by atomic absorption spectrophotometry. Lead was found in quantities believed to be below the toxic range; concentrations in the control series from Point of Pines were, with few exceptions, higher than in the experimental series from Kinishba.

Gahnite compositions compared

1984 ◽  
Vol 48 (348) ◽  
pp. 425-429 ◽  
Author(s):  
Richard A. Batchelor ◽  
Judith A. Kinnaird
Keyword(s):  
Spinel Structure ◽  
Atomic Absorption Spectrophotometry ◽  
Unit Cell Dimension ◽  
Compositional Heterogeneity ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Absorption Spectrophotometry ◽  
The World ◽  
Wet Chemical

Abstract Blue-coloured gem-quality spinel from Nigeria was analysed by wet chemical methods (using atomic absorption spectrophotometry) and investigated by X-ray diffraction. The results showed it to be gahnite (unit cell dimension a=8.091±0.003 Å) containing 36.7% ZnO, 3.58% FeO, and 0.12% MgO. The spinel has an RI of 1.79 and density between 4.4 and 4.59. Broadening of the n[111] XRD reflections indicates a measure of compositional heterogeneity. The gahnite analyses were compared with compositions of zinc spinels from other parts of the world. The analyses cluster into two distinct groups, Mg-rich spinels of metamorphic origin and Mg-poor spinels (including the Nigerian gahnite) with igneous affinities. Diadochy seems to operate within the zinc spinel structure between (Zn + Mn) and (Fe + Mg).

scholarly journals A Reexamination of Aluminum in Alzheimer's Disease: Analysis by Energy Dispersive X-ray Microprobe and Flameless Atomic Absorption Spectrophotometry

1989 ◽  
Vol 16 (S4) ◽  
pp. 498-503 ◽  
Author(s):  
Roland W. Jacobs ◽  
Taihung Duong ◽  
Robert E. Jones ◽  
George A. Trapp ◽  
Arnold B. Scheibel
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Energy Dispersive ◽  
Aging Brain ◽  
X Ray ◽  
Flameless Atomic Absorption ◽  
Absorption Spectrophotometry ◽  
Associated Lesions

ABSTRACT:We have attempted to verify the presence of increased aluminum (Al) levels in Alzheimer's disease (AD) brains by energy dispersive X-ray microanalysis (EDX) and flameless atomic absorption spectrophotometry (AAS). Tissue from seven AD brains, mounted on carbon polymerized coverslips, were stained with Congored or treated immunohistochemically to allow optical localization of AD-associated lesions during EDX. Despite a demonstrated sensitivity of 20-25 ppm, we were unable to detect Al in either plaque cores or neurons containing neurofibrillary tangles. For AAS, wet weight samples (ranging from 48-144 mg) from six of the seven AD brains and four controls were selected from regions similar to those studied under EDX, i.e., Brodmann areas 9, 11, 28, 46, 47, and the hippocampus. The tissue surrounding each sample site was sectioned and stained for thioflavin S. Both controls and AD samples revealed similar levels of Al ranging from undetectable to 1.80 ng/mg wet wt. (mean AD: 0.28 ± 0.39 (SD), control: 0.54 ± 0.58 (SD)), independent of degree of histopathology or age of the case. We conclude that the combined strengths of these two techniques on similar tissue specimens demonstrate that abnormal Al levels are not required to produce the histologic findings of AD and that this element may not accumulate in the aging brain. It is unlikely, therefore, that Al is essential in the etiology of pathogenesis of plaques and tangles in AD. Al's role as a primary or secondarily associated event, when present, needs further delineation.

scholarly journals STUDIES ON CHITOSAN - BENZALDEHYDE INTERACTION IN A HOMOGENEOUS SYSTEM AND ITS ADSORPTION BEHAVIOR OF METAL IONS IN AQUEOUS SOLUTION

2017 ◽  
Vol 25 (1) ◽  
pp. 149-154
Author(s):  
Do Truong Thien ◽  
Nguyen Van Tuyen ◽  
Tran Thi Y Nhi
Keyword(s):  
Thermal Analysis ◽  
Chemical Resistance ◽  
Homogeneous System ◽  
Atomic Absorption Spectrophotometry ◽  
Adsorption Properties ◽  
Adsorption Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorption Spectrophotometry ◽  
Modified Polymers

In this work, N-benzylidene chitosan was synthesized by chitosan –benzaldehyde interaction in a homogeneous system. The modified polymers were characterized by means of infrared (IR) spectra, X-Ray diffraction and thermal analysis. Their adsorption behavior was investigated by atomic absorption spectrophotometry. The experimental results showed that N-benzylidene chitosan had better adsorption properties and higher chemical resistance than that of chitosan.

Determination of Osmium by Atomic Absorption Spectrophotometry

1968 ◽  
Vol 22 (5) ◽  
pp. 532-535 ◽  
Author(s):  
T. W. Osolinski ◽  
N. H. Knight
Keyword(s):  
Atomic Absorption ◽  
Valence State ◽  
Slight Modification ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Method ◽  
X Ray ◽  
Atomic Absorption Method ◽  
Absorption Spectrophotometry ◽  
Thiourea Complex

An atomic absorption method for the determination of osmium has been developed. The method is applicable in the concentration range of 1 to 300 ppm of osmium with a relative error of ±4%. It is applicable to both aqueous and nonaqueous osmium solutions and, with slight modification, can be applied to the determination of osmium in its thiourea complex. The results are not affected by the valence state of osmium. A sensitivity of 1 ppm is readily achieved by the atomic absorption method and this is comparable to that obtained by spectrophotometry and x-ray fluorescence. The method is rapid and requires less than 5 min of operator time per sample.

Analysis of Lead Heavy Metal (Pb) Contamination on Matte Lipstick Preparations for Sale in Banda Aceh City Aceh Market

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Rizki Andalia ◽  
Mulia Aria Suzanni ◽  
Rini Rini
Keyword(s):  
Heavy Metal ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
The Body ◽  
Permissible Limit ◽  
The Sun ◽  
Absorption Spectrophotometry ◽  
Pb Contamination ◽  
Body Organ ◽  
Banda Aceh

Lipstick or lip dye is a cosmetic dose that serves to coloring, decorative the lips, as a moisturizing material and protect the lips from exposure the sun to provide optimum results. Lipstick should not contain chemicals such as lead (Pb) because the Pb is a heavy metal that is very dangerous when continuously used on the skin, because it will be absorbed into the blood and attack the body organ causing the onset of disease. According to BPOM that the lead rate on the lipstick does not exceed the permissible limit of 20 mg/kg or 20 ppm.This research aims to know the levels contained in the samples are 4 brands of matte lipstick that are sold in the Aceh market in Banda Aceh City with the method of atomic absorption spectrophotometry (AAS). The results showed that on the 4 brands of lipstick matte contain heavy metal lead (Pb) with a rate still qualified allowed by BPOM  is samples A, B, C, and D, respectively at 0.24 ppm; 0.10 ppm; 2.87 ppm and 1.32 ppm, so that the 4 brands of lipstick matte are still used.

PENURUNAN KONSENTRASI LOGAM Pb2+ DAN Cd2+ PADA LIMBAH CAIR INDUSTRI SASIRANGAN DENGAN METODE FITOREMEDIASI

2015 ◽  
Vol 1 (1) ◽  
pp. 41
Author(s):  
Bella Santa Rossi ◽  
Paryanti Paryanti ◽  
Yuli Ristianingsih ◽  
Abubakar Tuhuloula
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry

Pewarnaan pada proses produksi kain sasirangan menghasilkan limbah yang mengandung logam berat, diantaranya adalah timbal (Pb2+) dan kadmium (Cd2+). Penelitian ini bertujuan untuk mengetahui pengaruh proses fitoremediasi terhadap konsentrasi logam Pb2+ dan Cd2+ dari limbah cair industri sasirangan di Kalimantan Selatan, serta mengetahui pertambahan berat basah eceng gondok. Eceng gondok yang sudah dibersihkan dan diaklimatisasi ditanam dalam reaktor berisi larutan limbah dengan konsentrasi 3% (v/v); 9% (v/v); dan 15% (v/v). Sampel diambil setiap 2 hari sekali sebanyak 100 ml dan dianalisis menggunakan AAS (Atomic Absorption Spectrophotometry). Hasil penelitian ini menunjukkan bahwa konsentrasi logam Pb2+ dan Cd2+ dalam limbah setelah proses fitoremediasi terjadi penurunan. Kadar Pb2+ pada konsentrasi 3% (v/v) semula 0,197 ppm menjadi 0,062 ppm, pada konsentrasi 9% (v/v) semula 0,200 ppm menjadi 0,077 ppm dan untuk 15% (v/v) adalah 0,225 ppm menjadi 0,093 ppm. Sedangkan untuk Cd2+ konsentrasi 3% (v/v) semula 0,110 ppm menjadi 0,059 ppm, konsentrasi 9% (v/v) adalah 0,127 ppm menjadi 0,045 ppm dan untuk konsentrasi 15% (v/v) semula 0,144 ppm menjadi 0,047 ppm.

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