Voltammetric Behavior of the Insecticide Pymetrozine on a Mercury Meniscus Modified Silver Solid Amalgam Electrode

Transport and material handling is a sum of technological processes in the wood-processing industry. Hydraulic drives are one of the drive options used as a basic part of the transport – handling machines. Contamination control involves preventing contaminants from entering a hydraulic system and placing filters in strategic locations throughout the system to trap any contaminants to find their way into the fluid. But for critical equipment, a successful contamination control program must also include regular assessment of the hydraulic fluid cleanliness. It must be often done every two to six months or after every 500 or 1,000 hours of operation, depending on the equipment duty cycle, operating environment, and how critical it is to overall operation. Pressure forces in hydraulic drives are transferred to hydraulically-operated devices which also serve to lubricate the elements, displace and remove heat from the system. To increase the service life of hydraulic drives, hydraulic oil must meet individual physical characteristics. To ensure reliability, timely diagnosis of hydraulic oil is required. Some experts also recommend that fluid to be tested immediately after any maintenance event that exposes the hydraulic system to the external environment. This could occur when a hose or other component is replaced or fluid is added to the reservoir. Fluid replenishment can be particularly troublesome because new fluid is notorious for being dirty – often from improper storage and handling practices. The article deals with the methodology of measuring the basic physical properties of hydraulic oil by the respective diagnostic devices directly on the hydraulic drive of the bend saw in the full operation of the machine. The methodology suggested enables making decisions for improvement of the hydraulic oil state.

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“…Přehled pesticidů, jež byly na našem pracovišti analyzovány, je uveden v tabulce 1 (cit. [28][29][30][31][32][33][34][35][36][37][38] ).…”

Section: Výsledky a Diskuseunclassified

Analysis of the hydraulic oil to drive band sawmill

Krilek

Kovach

Kuvik

et al. 2019

SBUNFU

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“…The increase in the use of pesticides often results in many adverse impacts, especially on the agricultural environment [6, 7]. For this reason, various analytical techniques are used to test pesticides, including chromatographic methods [8, 9]. Pesticides are widely used [10] in agriculture, medicine, and industry and have the potential to change the ecosystem [11].…”

Section: Introductionmentioning

confidence: 99%

An Analytical Survey of Trace Heavy Elements in Insecticides

Alnuwaiser

2019

International Journal of Analytical Chemistry

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There are many types of insecticides traded in the local and international markets, which vary depending on the type of target insect (e.g., whether crawling or flying). This paper aimed to assess the concentration of trace elements present in the various pesticide formulations (solid, liquid, and gaseous). This study was conducted in two groups: the first group was comprised of zinc, copper, iron, chromium, phosphorus, selenium, and cobalt; the second group included four heavy toxic elements (arsenic, thallium, lead, and mercury). These elements were analyzed by inductively coupled plasma/optical emission spectrometry (ICP-OES).

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“…Different types of amalgam or construction of electrodes have been proposed up to date. Among them, one can distinguish cyclic renewable silver amalgam film electrode [Hg(Ag)FE] from Polish group in Cracow [ 30 – 34 ], dental amalgam electrode from Norwegian group in Trondheim [ 35 , 36 ], mercury meniscus modified silver solid amalgam electrode (m-AgSAE) from Czech group in Prague [ 37 , 38 ], as well as amalgam modified screen-printed carbon electrodes [ 39 , 40 ]. Surprisingly, up to date, no literature data can be found with respect to electrochemical determination of FLM.…”

Section: Introductionmentioning

confidence: 99%

Improved electroanalytical characteristics for flumetralin determination in the presence of surface active compound

et al. 2017

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The use of square wave voltammetry (SWV) and square wave adsorptive stripping voltammetry (SWAdSV) in conjunction with a cyclic renewable silver amalgam film electrode for the determination of flumetralin is presented. Poor separation of two overlapped reduction peaks is significantly improved when hexadecyltrimethylammonium bromide is used as a component of the supporting electrolyte solution (together with BR buffer pH 9.5). The SW technique parameters were investigated and found optimal as follows: frequency 50 Hz, amplitude 40 mV, and step potential 5 mV. Accumulation time and potential were studied to select the optimal conditions in adsorptive voltammetry. The analytical curve was linear for the flumetralin concentration range from 1.0 × 10−6 to 1.0 × 10−5 mol dm−3 and from 5.0 × 10−9 to 1.0 × 10−7 mol dm−3 for SWV and SWAdSV, respectively. Detection limit of 6.5 × 10−10 mol dm−3 was calculated for accumulation time 60 s at −0.2 V. The repeatability of the method was determined at a flumetralin concentration level equal to 5.0 × 10−9 mol dm−3 and expressed as %RSD = 5.0% (n = 6). The proposed method was applied and validated successfully by studying the recovery of herbicide content in spiked environmental samples.Graphical abstract

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Voltammetric Behavior of the Insecticide Pymetrozine on a Mercury Meniscus Modified Silver Solid Amalgam Electrode

Cited by 6 publications

References 26 publications

Analysis of the hydraulic oil to drive band sawmill

Analysis of the hydraulic oil to drive band sawmill

An Analytical Survey of Trace Heavy Elements in Insecticides

Improved electroanalytical characteristics for flumetralin determination in the presence of surface active compound

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