Topic
Detection limit
About: Detection limit is a research topic. Over the lifetime, 34379 publications have been published within this topic receiving 644817 citations. The topic is also known as: limit of detection & lower detection limit.
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TL;DR: The ElectraSense platform has been used to develop nucleic acid assays for highly accurate genotyping of a variety of pathogens including bio-threat agents and common pathogens of the respiratory tract.
161 citations
TL;DR: The above procedure has been successfully employed for analysis of uranium(VI) in soil and sediment samples and in conjunction with the Arsenazo III procedure was tested by analysing MESS-3, a marine sediment certified reference material.
161 citations
TL;DR: In this article, a method was developed to quantify polyphenols or phenolic compounds through direct interactions of polyphenol with Fast Blue BB in an alkaline medium and the absorbance was measured at 420 nm.
161 citations
TL;DR: In this article, a simultaneous preconcentration method was developed for determination of trace amounts of Cu, Fe and Pb by atomic absorption spectrometry, based on the retention of their methylthymol blue complexes by naphthalene methyltrioctyl ammonium chloride adsorbent in a column.
160 citations
TL;DR: In this article, a sensitive voltammetric method for detection of trace heavy metal ions using chemically modified carbon nanotubes (CNTs) electrode surfaces is described, where the CNTs were covalently modified with cysteine prior to casting on electrode surfaces.
Abstract: A sensitive voltammetric method for detection of trace heavy metal ions using chemically modified carbon nanotubes (CNTs) electrode surfaces is described. The CNTs were covalently modified with cysteine prior to casting on electrode surfaces. Cysteine is an amino acid with high affinities towards some heavy metals. In this assay, heavy metals ions accumulated on the cysteine-modified CNT electrode surfaces prior to being subjected to differential pulse anodic stripping voltammetry analysis. The resulting peak currents were linearly related to the concentrations of the metal ions. The method was optimized with respect to accumulation time, reduction time and reduction potential. The detection limits were found to be 1 ppb and 15 ppb for Pb2+ and Cu2+ respectively. The technique was used for the detection of Pb2+ and Cu2+ in spiked lake water. The average recoveries of Pb2+ and Cu2+ were 96.2% and 94.5% with relative standard deviations of 8.43% and 7.53% respectively. The potential for simultaneous detection of heavy metal ions by the modified CNTs was also demonstrated.
160 citations