Microplastic pollution in water bodies is an alarming problem which needs to be addressed. However, issues such as size, shape and their appearance light (transparent or translucent) make it difficult optically detected. Here, a feasibility study of portable prototype optical sensor with the capability measuring simultaneously specular laser reflection transmission from microplastic particles presented. The signal transmitted interference pattern were recorded photodiode CCD camera,...

Erosion of microplastics due to residence time in aquatic environments causes roughening the microplastic. Unfortunately, currently used measurement methods do not provide information on surface roughness microplastic embedded water. In this study we propose a novel method by using transmittance get magnitude and rank thickness. For such purpose, studied optical properties as dispersion, absorption both plastics water partial spectral range visible light (Vis), transmission scattering...

Due to the proven carcinogenicity of Sudan III and IV dyes, they are considered global public health issues. They banned in all forms as food colourants. We propose monitoring simple easy-to-measure optical properties palm oils, such refractive indices spectrophotometric properties, efficient indicators detect adulteration. Coupling these results with principal component analysis, excess index, integration transmittance introduces a novel detection tool for authentication edible oil. This...

In this study a commercial particle analyzer was used to image and help sorting microplastic particles (MPs) dispersed in filtrated de-aerated tap water. The device provides relatively easy fast procedure for obtaining ultra-high-definition imaging, allowing the determination of shape, size, number 2D-projections solid particles. analysis revealed clear differences among studied different MPs originating from grinding five common grades plastic sheets as they affect rendering differently,...

In this article, we demonstrate detection and identification of ten microplastic types directly in a water sample using an table derived from hyperspectral images. We selected total fourteen wavelengths which can be used to distinguish these types. enhanced the visibility by computationally removing baseline correcting with reflectance at 1550 nm. This method avoids, prevents, eases most laborious preparation mandatory prior analysis robust techniques such as Raman spectroscopy Fourier...

Adulteration of fuels is a major problem, especially in developing and third world countries. One such case the adulteration diesel oil by kerosene. This problem contributes to air pollution, which leads other far-reaching adverse effects, as climate change. The objective this study was develop relatively easy measurement method based on an inexpensive, handheld Abbe refractometer for detection estimation ascending order amount kerosene present adulterated samples field conditions. We...

Liquid fuel adulteration has several far-reaching impacts such as environmental pollution. A widespread practice is typically the of diesel oil by kerosene. The relatively cheap price kerosene probably most important reason for its usage in illegal adulteration. Herein, we demonstrate use a prototype optical sensor efficient tracking adulterated oil. In this study, an screening fake proposed. device exploits phenomenon laser light reflection from film over roughened glass plate. sensing...

A usable loophole for the detection and identification of microplastics directly in water is their specific spectral signature. The determination signatures, or group an optical spectrum, reflection transmission, a mixture enables this material constituents. In article, we present procedure based on hyperspectral imaging measurements to identify sample. This method avoids, prevents, eases laborious sample preparation mandatory prior analysis with robust techniques such as Raman spectroscopy...

Fuel adulteration is a major factor contributing to environmental pollution. The tendency adulterate diesel oil with kerosene becoming prevalent in many countries, which particularly driven by the lower cost of than oil. objective this study develop method separating and discriminating between different compositions binary liquid fuel mixtures. In study, we have utilized refractive indices mixtures measured using an Abbe refractometer, inversion transmittance spectra visible near-infrared...

Adulteration of diesel oil by kerosene is a serious problem because air pollution resulting from car exhaust gases. The objective this study was to develop relatively simple optical measurement and data analysis method screen low-adulterated oils. For purpose, we introduce the utilization refractive index with refractometer, scanning visible-near-infrared transmittance, transmittance inversion using singly subtractive Kramers-Kronig relation, exploitation so-called wavelength-dependent...

Many applications require liquids to efficiently wet required surfaces as it denotes better performance. The dynamics of pure and complex liquid is known influence the spreading properties; however, this less understood solicits other measuring techniques elucidate grey area. In work, we demonstrate use simple yet novel optical methods in monitoring diesel kerosene their binary (complex) mixtures. devices are a table model portable sensors which diffractive element for filtering specular...

The knowledge of the plastic type, thickness, and nature surface is important towards monitoring microplastic pollution in water bodies, especially when vis-NIR spectroscopy utilized. Factors such as complex environment roughness induced-light scattering probing light limit optical detection these parameters in-situ measurements, however. In this paper, a novel application Kramers–Kronig analysis was exploited to identify both smooth rough film-type macroplastics with unknown thickness. This...

Emerging optical techniques for sniffing out millimeter- to sub-micron-scale plastics in aquatic settings could aid the fight against a looming environmental threat.

Adulteration and smuggling of diesel oils are serious problems. Vis-NIR spectra PCA were applied to study samples from same oil fields refinery process. Variability adulteration both detected rapidly.

Visual classification has been one of the major methods in sampling and identification microplastics. In this study, however, a commercial particle analyzer was used to image analyze dilute mix microplastic particles (MPs) dispersed filtrated de-aerated tap water. The device provides relatively easy fast procedure for obtaining ultra-high-definition imaging, allowing determination shape, size, number 2D-projections solid particles. analysis revealed clear differences among studied different...

We demonstrate that direct imaging is a powerful tool for the detection and recognition of microplastics in water, even case complex matrices. use commercial high-resolution device (Valmet FS5, Valmet Oy.) originally developed observation wood fibres particles papermill pulp samples. show how to discriminate from other suspension real water differences between several common plastic types homemade