A Simple Colorimetric Procedure for the Determination of Iodine Value of Vegetable Oils Using a Smartphone Camera

Peamaroon, Nipat; Jakmunee, Jaroon; Moonrungsee, Nuntaporn

doi:10.1007/s41664-021-00168-x

Cited by 20 publications

(15 citation statements)

References 30 publications

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“…As shown in Figure a, we built a homemade setup. The fluorescent images were captured by a smart phone (Xiaomi Mi 10S) from −120.5 to −88.3 °C (Figure b) . The corresponding fluorescence intensity was represented by the brightness of each image, which was quantified to a grayscale using the ImageJ program .…”

Section: Results and Discussionmentioning

confidence: 99%

“…The fluorescent images were captured by a smart phone (Xiaomi Mi 10S) from −120.5 to −88.3 °C (Figure 5b). 36 The corresponding fluorescence intensity was represented by the brightness of each image, which was quantified to a grayscale using the ImageJ program. 37 The grayscale at different temperatures were then obtained and plotted against the temperature.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Design of a Temperature-Independent Luminescent Probe for Visualization of Ice-to-Liquid Transition at −129 °C

et al. 2022

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The temperature-dependent nature and intense emission in solution of fluorescence molecules prevent them from visualizing various processes accompanying temperature changes (e.g., the liquid−ice transition at ultralow temperatures). To overcome the intrinsic difficulty, we synthesized a custom-designed fluorescent probe to exhibit the temperature-independent negligible fluorescence in the solution state but emit bright light in the icing state. The ice-to-liquid transition of four hydrocarbons, whose freezing points are between −27 and −129 °C, can be sensitively visualized using the proposed temperature-independent fluorescent probe. More interestingly, we have built a homemade platform to enable the real-time imaging of the freezing points of these four hydrocarbons within 3 min. For the first time, we designed a liquid−ice transition-sensitive probe at ultralow temperatures, different from the conventional temperature-dependent systems. This success will not only help to gain insights into the icing mechanisms but may also contribute to the development of portable visualization devices for monitoring phase transition.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Design of a Temperature-Independent Luminescent Probe for Visualization of Ice-to-Liquid Transition at −129 °C

et al. 2022

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“…These bonds can make the material easily degraded or oxidized. In comparison, in the another edible oils such as palm oil and olive oil, each of which has an iodine value of 57.5 and 80.2 g I2/100 g [11] while nonedible oil such as Simarouba glauca (paradise tree) oil has an iodine value of 46 g I2/100 g [12]. The transesterification results are summarized at Table 2 with parameters as in the methods.…”

Section: Raw Materials Characterizationmentioning

confidence: 99%

Synthesis of Coconut Methyl Ester Using Organic Catalytic Agents

Sofyan¹,

Ma’ruf²,

Hafizah³

et al. 2023

Majalah Ilmiah Pengkajian Industri

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Biodiesel is one of the biomass materials or renewable energy, which is needed today to replace fuel from fossil energy, which can reduce global warming and has a high renewability cycle. Biodiesel is derived from plants, therefore it is also called biofuel. One type of biodiesel group is coconut methyl ester (CME), which is biodiesel obtained from coconut oil as a raw material. In this study, a synthesis of used coconut oil and methanol has been carried out with an organic catalyst based on coconut coir called the ASK catalyst. The results of transesterification have provided some important information, including: the yield is 15-19.5% after usage of the ASK catalyst consisting of amorphous phase and crystalline phase ClK0.8Na0.2, with the density and viscosity of products are 0.788-0.802 g/ml and 0.6-1 mm2/s. These results allow it to provide a distinctive advantage in its application. Keywords: CME; FAME; biomass; transesterification; organic catalyst

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“…K2O, and Na2O, can produce a maximum CME yield of 19.5%. This was because using of heterogeneous catalysts in some previous studies had shown that the presence and number of crystal phases can have an effect in the adsorption activity of catalyst elements where it can lower FFA (Free Fatty Acid) levels in esterification reactions and increase product yields in transesterification reactions (Chen et al, 2013;Husin et al, 2018;Sakti La Ore et al, 2020;Vadery et al, 2014).…”

Section: Catalyst Characterizationmentioning

confidence: 99%

The Synthesis of CME (Coconut Methyl Ester) With Organic Catalyst: Experiments, Data Analysis and Kinetics Model

Sofyan¹,

Ma’ruf²,

Hafizah

et al. 2021

Preprint

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Biodiesel is one of the biomass materials or renewable energy, which is needed today to replace fuel from fossil energy, which can reduce global warming and has a high renewability cycle. Biodiesel is obtained from plants, so it is also known as biofuel. One type of biodiesel group is CME (Coconut Methyl Ester) which is biodiesel obtained from coconut oil as raw material. In this study, a synthesis of used coconut oil and methanol has been carried out with an organic catalyst based on coconut coir called the ASK catalyst. The results of transesterification have provided some important information, including: the yield are 15-19,5% after usage of the ASK catalyst consisting of amorphous phase and crystalline phase ClK0,8Na0,2, with the density and viscosity of products are 790-800 kg/m3 and 0,6-1 mm2/s. Yield data obtained are then used to build the kinetics equation. The equation is 𝑌 = 1 − e^(-k'tn), with the value of n = 1 and k' for temperatures of 50oC and 60oC were 0,20 and 0,21, respectively, and a minimum activation energy of Q = 1,1 kJ/mol, which can determine reaction time needed at a specified temperature to achieve a certain yield value.

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A Simple Colorimetric Procedure for the Determination of Iodine Value of Vegetable Oils Using a Smartphone Camera

Cited by 20 publications

References 30 publications

Design of a Temperature-Independent Luminescent Probe for Visualization of Ice-to-Liquid Transition at −129 °C

Design of a Temperature-Independent Luminescent Probe for Visualization of Ice-to-Liquid Transition at −129 °C

Synthesis of Coconut Methyl Ester Using Organic Catalytic Agents

The Synthesis of CME (Coconut Methyl Ester) With Organic Catalyst: Experiments, Data Analysis and Kinetics Model

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