pb and cd in water samples were determined by cloud point extraction (cpe) with sodiumdiethyldithiocarbamate (ddtc) as the chelating agent and octylphenoxypolyethanl (triton x-114) asthe surfactant prior to flame atomic absorption spectrometry (faas) determination. the main factorsof affecting the extraction and detection processes were optimized. the preconcentration of 10 ml ofstandard soluti...

this paper investigates host condition factor, parasite interaction and metal accumulation in tilapia guineesis and host-parasite system in iddo area of lagos lagoon, nigeria. eighty specimens of t. guineensis from the lagoon were caught and dissected for intestinal helminth parasites. condition factors of all individuals were determined. median condition (k<2.62 and k>2.62) were used in groupi...

Background & Aims: Today, toxic effluents have created ecological and health problems in and around the industrial cities resulting in death of nearby living organisms. The aim of this research was to increase the elimination of copper and zinc from copper factory effluents in Kerman/Iran through mutation inducing in metal-resistant bacteria by using Acriflavine, Acridine orange and Ethidium br...

many studies employing various methods have been carried out into the number densities of excited atoms in electrical discharges with inert gases [1,2,3], but the ranges of the discharge current and gas pressure is very limited in them all. in this work, the population densities of 3s, 3s&apos; of neon have been investigated using the atomic absorption method. since the discharge current and ga...

THE INITIAL STUDIES BY WILLIS (2, 3) and the more recent work of Zettner and Seligson (i) and others (4-7, 9-11) have proven the utility of atomic absorption spectrophotometry (AAS) in the clinical laboratory. However, until very recently there has been very little if any published information dealing with normal serum calcium values by atomic absorption spectrophotometry (11). The primary purp...

Laboratories working towards accreditation by the International Standards Organization (ISO) 15189 standard are required to demonstrate the validity of their analytical methods. The different guidelines set by various accreditation organizations make it difficult to provide objective evidence that an in-house method is fit for the intended purpose. Besides, the required performance characterist...

Two interlaboratory surveys of urine nickel analyses were performed in which eight or nine urine samples were distributed to laboratories in seven nations for measurements of nickel concentrations by atomic absorption spectrometry. In both surveys, wide discrepancies were observed in the values for urine nickel concentrations that were obtained in different laboratories by various analytical me...

This research focuses on understanding biosorption process and developing a cost effective technology for treatement of heavy metals-contaminated domastic water. A new biosorbent has been prepared by crushing of neem leaves. The experiments were designed according to Taguchi’s (L16) orthogonal array to optimize experimental runs. In order to assess the biosorption behavior of neem leaves satisf...

Dispersive Liquid-Liquid MicroExtraction technique based on Solidification of a Floating Organic drop (DLLME-SFO) combined with flame atomic absorption spectrometry was developed for determination of thallium in water sample. An appropriate mixture of acetone and 1-undecanol was rapidly injected into an aqueous sample containing TlCl4- which forms an ion pair with bril...