Accordingly, this study was conducted to investigate the concentration of lead and cadmium of different toothbrush brands. For this purpose, a total number of 20 toothbrushes from different brands were taken randomly. The concentration of lead and cadmium in the toothbrushes was then specified using Graphite furnace atomic absorption spectroscopy (GFAAS), model AAS 6200. The samples were prepar...

background: lead and cadmium are toxic heavy metals found as major contaminants in food products and edible oils. the aims of this study were to investigate the lead and cadmium contaminations in seeds and extracted oils from brassica napus l and carthamus tinctorius grown in the vicinity of industrial sites (isfahan zobe ahan) near isfahan province/iran. methods: in this study, the seeds of b....

We have examined the anodic stripping voltammetry (ASV) of Cd and Pb at carbon screen printed electrodes modified by an in situ deposited Bi film, and have demonstrated significant cross talk between the stripping peaks of the two metals. A simple and generally applicable method for dealing with this problem is described, based on curve-fitting three-dimensional calibration plots using MATLAB. ...

this study aimed to investigate the concentrations of two heavy metals, lead and cadmium, in the water of zayandehroud river which is surrounded by zarinshahr rice farms. water was sampled from a depth of 30 cm during june, july and august 2015, i.e. during the process of planting, growing and after harvesting, in three stations. water was collected from three points; 20m before the farms, besi...

Infants are particularly sensitive to the toxic effects of lead. It is very important to know the contribution of milk to lead intake. The purpose of this study is to determine lead and cadmium present in samples of human milk by using graphite furnace atomic absorption spectrometry (GFAAS).Thirty human milk samples from three different localities were collected from healthy lactating women on ...

contamination of water by heavy metals is a global problem. nowadays everybody knows that heavy metal ions consist of iron, lead, manganese, zinc, copper, cadmium, and nickel and so on they are common contaminants in wastewater and known to be toxic and carcinogenic that lead to many problems for human and water environment. in this research, experiments have been performed in the batch system ...

Two bilayer metal-organic frameworks (MOFs) respectively containing trinuclear Pb/K and Cd/Na clusters have been solvothermally synthesized. Photoluminescence studies showed that they exhibit tunable purple-to-red-to-green and purple-to-green luminescence behaviours by variation of excitation light, respectively.