The identification and concentration of heavy metals, which may be so harmful for the body, is determined by the method of calibration-free laser-induced breakdown spectroscopy using a special strategy. First, the plasma temperature is obtained using the Boltzmann plot. Then, a line with an inappreciable self-absorption is considered for each element as the reference. The modified intensities o...

The aim of this work was to develop a selective cloud point extraction method for the separation and preconcentration of copper(II) prior to spectrophotometric determination. For this purpose dithizone was used as a complexing agent and the experimental solution was acidified with sulfuric acid. Triton X-114 was used as a surfactant and after phase separation, based on the cloud point of th...

Abstract Background The aim of this study was to determine the risk factors and develop a nomogram for blood transfusions after posterior lumbar spinal fusion (PSL). Methods We conducted retrospective, single-center based on 885 patients receiving PSL, data obtained from May 2015 September 2019. Univariable multivariable logistics regression analysis were identify transfusion, constructed indiv...

Univariate calibration method is a simple, cheap and easy to use procedure in analytical chemistry. A univariate analysis will be successful if a selective signal can be found for the analyte(s). In this work, two simple ways were used to find the selective signals, spectral ratio plot (SRP) and loading plot (LP). Both of them were able to discover the selective regions in the recorded data set...

A flow injection method is reported for the determination of ascorbic acid based on amperometric detection, using a cobalt(II) phthalocyanine (CoPc) modified graphite-epoxy electrode. The amperometric respons was evaluated with regard to pH, ionic strength of the electrolyte, flow rate of the carrier solution, injected sample volume and conditioning time of the electrode. The limit of detec...

A Visual Basic program for flexible, interactive processing of ion-microprobe data acquired for quantitative trace element, Al–Mg, Mn–Cr, Fe–Ni and U–Th–Pb geochronology applications is described. Default but editable run-tables enable software identification of secondary ion species analyzed and for characterization of the standard used. Counts obtained for each species may be displayed in plo...

Near-earth hyperspectral big data present both huge opportunities and challenges for spurring developments in agriculture high-throughput plant phenotyping breeding. In this article, we data-driven approaches to address the calibration utilizing near-earth agriculture. A data-driven, fully automated workflow that includes a suite of robust algorithms radiometric calibration, bidirectional refle...

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