UV–Visible Spectrometers: Versatile Instruments across the Chemistry Curriculum

Czegan, Demetra A. C.; Hoover, Diana K

doi:10.1021/ed200776x

Cited by 30 publications

(40 citation statements)

References 38 publications

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“…3 To help address this deficiency, we developed a simple, rugged, and low-cost homemade visible spectrophotometer. The homemade spectrophotometer could be constructed by high school students in physics or chemistry classes using readily available components.…”

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confidence: 99%

A Low-Cost Quantitative Absorption Spectrophotometer

2012

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In an effort to make absorption spectrophotometry available to high school chemistry and physics classes, we have designed an inexpensive visible light absorption spectrophotometer. The spectrophotometer was constructed using LEGO blocks, a light emitting diode, optical elements (including a lens), a slide-mounted diffraction grating, and a photodiode detector. The photodiode detector was mounted on a rotatable arm for wavelength selection based on elementary laws of diffraction. This simple design demonstrates basic physical principles (such as diffraction and absorption of light) that are frequently lost in commercial "black box" instruments. The homemade spectrophotometer's performance, as measured by comparison to a commercial spectrophotometer, was shown to be sufficiently quantitative to facilitate experiments in chemistry or physics classrooms.

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confidence: 99%

A Low-Cost Quantitative Absorption Spectrophotometer

2012

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“…Conventional commercial spectrometers or spectrophotometers are usually able to measure the optical spectrum from a specified surface area at one point [58,59]. This is done either with one detector scanning the spectrum in narrow wavelength bands, or with an array detector, in which case all the spectral components are acquired at once.…”

Section: Hyperspectral Vnir Sensormentioning

confidence: 99%

The AIDSS Module for Data Acquisition in Crisis Situations and Environmental Protection

Krtalić

Bajić²,

Ivelja

et al. 2020

Sensors

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The Toolbox implementation for removal of antipersonnel mines, submunitions and unexploded ordnance (TIRAMISU) Advanced Intelligence Decision Support System is an operational system proposed to Mine Action Centres worldwide for conducting non-technical surveys in humanitarian demining. The system consists of three modules, one of which is the module for data acquisition introduced and described in this study. The module has been designed, produced, improved, used and operationally tested and validated on several platforms (helicopters, remotely piloted aircraft systems (RPAS) and a blimp), with various sensors and acquisition units (Global Positioning System (GPS) and inertial measurement unit) in a variety of combinations for additional data acquisition from deep inside a suspected hazardous area. For the purposes of aerial data acquisition over a suspected hazardous area, the use of multiple sensors such as visible digital cameras and multi-spectral visible, near infrared (VNIR), hyperspectral VNIR and thermal infrared sensors are of benefit, because they display the scene in different ways. Off-the-shelf equipment and software were mostly used, but some specific equipment, such as sensor pods, was developed and also some software solutions for data acquisition and pre-processing (transforming hyperspectral line scanner data into hyperspectral images, and producing hyperspectral cubes). The technical stability and robustness of the module were confirmed by operationally testing and evaluating the systems on the aforementioned platforms and missions in several actual suspected hazardous areas in Croatia and Bosnia and Herzegovina, between 2001 and 2015.

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“…No special facilities and protective equipment are needed. Furthermore, UV-VIS spectroscopy is a safe, low cost and simple instrument, which is suitable for undergraduate students with limited laboratory experience [9].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Studies of Fenton Oxidation Reaction by UV-VIS Spectroscopy

Dai¹,

Flatberg²,

Preisig³

et al. 2018

jlce

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Chemical reaction engineering is one of the core courses for chemical engineering students. Laboratory exercise is an essential part of this course. The goal of this laboratory exercise is to demonstrate the possibility of using an in-situ spectroscopic method (UV-VIS spectroscopy) to investigate reaction kinetics. A solution of naphthol blue black (NBB) is oxidized by H 2 O 2 through a Fenton oxidation process. In this exercise, the concentration of NBB was monitored by the UV-VIS spectroscopy, while the concentrations of H 2 O 2 , FeSO 4 and different pH levels may be adjusted to enable students to obtain a wide range of reaction kinetic data. The reaction rate constant, k app , can be estimated with a pseudo-first-order kinetic model. In addition, the reaction temperature was adjusted to investigate the decomposition activation energy (E a), which exhibited a value of 56.0±7 kJ mol-1 .

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UV–Visible Spectrometers: Versatile Instruments across the Chemistry Curriculum

Cited by 30 publications

References 38 publications

A Low-Cost Quantitative Absorption Spectrophotometer

A Low-Cost Quantitative Absorption Spectrophotometer

The AIDSS Module for Data Acquisition in Crisis Situations and Environmental Protection

Kinetic Studies of Fenton Oxidation Reaction by UV-VIS Spectroscopy

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