Automation of Optical Control of Metal Ions in Liquid Using a Smartphone

2019 ◽  
Vol 970 ◽  
pp. 290-296
Author(s):  
Nadezhda V. Saranchina ◽  
Eldar V. Urazov ◽  
Maria M. Gavrilenko ◽  
Nataliya A. Gavrilenko
Keyword(s):  
Metal Ions ◽  
Digital Image ◽  
Water Samples ◽  
Sampling Time ◽  
Automated Detection ◽  
Organic Ligands ◽  
Optical Control ◽  
Linear Calibration ◽  
Automatic Methods ◽  
Signal Treatment

A new automated smartphone-based assay for metals ions determination based on the color reaction with organic ligands was developed. Quantification was performed by measuring the color of the polymer optode. This offers a smartphone-based alternative to the colorimeric method for signal treatment usually employed in automatic methods. The technique enabled linear calibration within the range 1–500 ppb of metals ions. The sampling time used for this concentration range was 15 min. The method was also tested for the quantification of metals ions in water samples, followed by digital image treatment of the optode. The automated detection metals ions approach was demonstrated by applying smartphone to the analysis of metals ions. Relative recoveries of the analytes ranged from 87 % to 105 %. The described procedure has the potential to be a fully automated online smartphone platform for the purpose of routine onsite water analysis.

scholarly journals PENGEMBANGAN METODE CITRA DIGITAL BERBASIS APLIKASI ANDROID UNTUK ANALISIS ION LOGAM Cr(VI)

Alotrop ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 117-124
Author(s):  
Marti Hitsmi ◽  
Mochamad Lutfi Firdaus ◽  
Nurhamidah Nurhamidah
Keyword(s):  
Metal Ions ◽  
Digital Image ◽  
Water Samples ◽  
Metal Ion ◽  
Limit Of Detection ◽  
Tap Water ◽  
Inductively Couple Plasma ◽  
Image Method ◽  
Complex Method ◽  
Conventional Methods

The presence of heavy metals in the environment can be a serious problem because it is harmful to human health. One of the heavy metal ions that pollute the environment is the Cr6+ metal ion. The usual tool used to analyze metal ions is Cr6+ is the Atomic Absorption Spectrometry (AAS) and Inductively Couple Plasma (ICP) which are very expensive and require trained personnel. The purpose of this study was to design a simple detector for Cr6+ metal ions as an alternative to conventional methods using AAS and ICP. The detection tool was developed using the android-based digital image method with SLR data analysis techniques obtained from the reaction of the metal ion complex Cr6 + with the compound dhypenilcarbazida (DPC). The parameters of the tool measured were accuracy, selectivity and sensitivity with the reaction of DPC compounds as complexes. The comparison level of this method is the complex method with DPC using a UV-Vis spectrophotometer. This research was carried out in the Chemistry Laboratory FKIP UNIB in November 2018 until March 2019. The implementation of tool parameters was tested to samples of aquatic environments in Bengkulu City, namely PDAM Kota Bengkulu water, tap water of FKIP UNIB Dean, Lake UNIB water, Sungai Hitam water and water Pantai Panjang. The results showed that the detection of Cr6+ metal ions made by the android-based digital image method had better accuracy, selectivity and sensitivity than conventional methods. The DPC is selective for Cr6 + metal ions with a change in color from clear to violet, at a wavelength of 540 nm. Accuracy was checked using a UV-Vis spectrophotometer with 99% accurate results. After that, test sensitivity to Cr6 + metal ions. using the android application method generates a Limit of Detection (LOD) of 6.7 ppb. The detector that was developed was applied to water samples in the city of Bengkulu, it turned out that all of the water samples showed that the levels of Cr6+ metal ions were still below the threshold determined by the Minister of Health Regulation, so it was still safe to use in everyday life.

scholarly journals Occurrence of naphthenate deposition in crude oil production field offshore Niger Delta

2020 ◽  
Author(s):  
Opeyemi Lawal ◽  
Solomon A. Adekola ◽  
Akinsehinwa Akinlua
Keyword(s):  
Crude Oil ◽  
Metal Ions ◽  
Water Samples ◽  
Niger Delta ◽  
Produced Water ◽  
Oil Production ◽  
Acid Number ◽  
Total Acid ◽  
Offshore Field ◽  
High Possibility

AbstractCrude oil and produced water samples obtained from ten wells in an offshore field, Niger Delta, were analyzed, in order to determine the occurrence of naphthenates deposition in the field. Total acid number (TAN) and °API of the crude oil samples, pH and metal ions concentrations of the produced water samples were determined. The results revealed that TAN values ranged from 0.47 to 1.01 mgKOH/g with pH of 6.9–8.9, which were above established threshold. The metal ions concentrations especially for Ca++ and Na+ were relatively high. These imply a high possibility of metal-naphthenate precipitation in the oil production facilities in this field.

Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands

2019 ◽  
Vol 48 (27) ◽  
pp. 10011-10022 ◽  
Author(s):  
Hui-Sheng Wang ◽  
Cheng-Ling Yin ◽  
Zhao-Bo Hu ◽  
Yong Chen ◽  
Zhi-Quan Pan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Transition Metal Ions ◽  
Relaxation Behavior ◽  
Organic Ligands ◽  
Chelating Ligands ◽  
Single Molecule Magnet

Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.

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