Separation/Preconcentration Methods for the Determination of Aluminum in Dialysate Solution and Scalp Hair Samples of Kidney Failure Patients

2011 ◽  
Vol 144 (1-3) ◽  
pp. 205-216 ◽  
Author(s):  
Sumaira Khan ◽  
Tasneem Gul Kazi ◽  
Jameel Ahmed Baig ◽  
Hassan Imran Afridi ◽  
Nida Fatima Kolachi
Keyword(s):  
Kidney Failure ◽  
Scalp Hair ◽  
Hair Samples ◽  
Dialysate Solution

Samples of Kidney Failure Patients by Cloud Point Extraction and Electrothermal Atomic Absorption Spectroscopy

2012 ◽  
Vol 95 (6) ◽  
pp. 1755-1760 ◽  
Author(s):  
Jameel A Baig ◽  
Tasneem G Kazi ◽  
Mohammad Balal Arain ◽  
Hassan Imran Afridi ◽  
Khalida Perveen Mahar
Keyword(s):  
Atomic Absorption ◽  
Cloud Point ◽  
Absorption Spectroscopy ◽  
Kidney Failure ◽  
Atomic Absorption Spectroscopy ◽  
Cloud Point Extraction ◽  
Scalp Hair ◽  
Complexing Agent ◽  
Hair Samples ◽  
Dialysate Solution

Abstract A method has been developed for the determination of arsenic (As) in pharmaceutical and scalp hair samples of kidney failure patients by cloud point extraction (CPE). The scalp hair samples were subjected to microwave-assisted digestion in nitric acid–hydrogen peroxide (2 + 1, v/v). Then, dialysate and digested scalp hair solutions were preconcentrated by CPE using pyronine B as a complexing agent. The resulting complex was entrapped in nonionic surfactant (Triton X-114) prior to its determination by electrothermal atomic absorption spectroscopy. The validity of the CPE method for As was checked by analysis of a certified reference material of human hair and a standard addition method for dialysate solution. The chemical variables affecting the analytical performance of the CPE methods were studied and optimized. After optimization of the complexation and extraction conditions, a preconcentration factor of 52 was obtained for As in 10 mL of dialysate solution and acid digested samples of scalp hair. Under the optimum experimental conditions, the LOD and LOQ of As for the preconcentration of 10 mL of solution were 0.022 and 0.073 μg/L, respectively. The level of As in scalp hair samples of kidney failure patients was higher than in healthy controls.

Gender determination of caucasoid hair using image analysis

1993 ◽  
Vol 51 ◽  
pp. 216-217
Author(s):  
T.B. Ball ◽  
W.M. Hess
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Scalp Hair ◽  
The Body ◽  
Equivalent Diameter ◽  
Cross Sectional ◽  
Hair Samples ◽  
Length Width ◽  
Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

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.

Young's Modulus in the Identification of Human Scalp Hair

1982 ◽  
Vol 22 (1) ◽  
pp. 63-67 ◽  
Author(s):  
M. C. Johri ◽  
D. P. Jatar
Keyword(s):  
Young’S Modulus ◽  
Scalp Hair ◽  
Young's Modulus ◽  
Human Head ◽  
Human Scalp Hair ◽  
Positive Identification ◽  
Constant Rate ◽  
Hair Samples ◽  
The Difference

Young's modulus of 12 samples of human scalp hair, representing both sexes, has been determined to find out whether this physical characteristic could be used in the determination of sex, age or identity of a person. Hair samples of an individual were tested before as well as after washing and drying by ‘Constant Rate of Loading’ (CRL) method. Results indicate that washing and drying have some influence on the Young's modulus of human head hair. On washing and drying, the values of this parameter for both male and female hair are found to increase, but statistically the difference is insignificant. The Young's modulus values appear to be of little value in determining the sex of an individual. For differentiating between individuals also, due to large variation in the random values of hair of the same scalp, this property appears to be useful only for purposes of elimination in certain circumstances, particularly if hair is found in some fair quantity, and not for positive identification.

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