ANALYSIS OF FORMALDEHYDE PRESERVATIVES IN WET ANCHOVY (Stolephorus Sp.) FROM TRADITIONAL MARKETS IN MAKASSAR CITY, SOUTH SULAWESI

Adriani, Adriani; Karim, Abdul; Dali, Seniwati

doi:10.20956/ica.v11i1.6399

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Thus, these results suggest the direct confirmatory test for the formation of the formaldehyde intermediate during photocatalytic reduction to CO 2 to C 2 H 5 OH and CH 4 . 47,48 To further confirm the formaldehyde pathway, the 13 C NMR spectrum of 5-TC/Ce was recorded. The C of −CHO appears at the chemical shift of 190.05 (s, 1C) ppm, which is due to the deshielding effect of sp 2 carbon with high s character and withdraws electrons, thereby deshielding the hydrogen, and is also due to the anisotropy of C�O.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Mishra,

Mrinalini,

Kumar

et al. 2023

Langmuir

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The primary factors that govern the selectivity and efficacy of CO2 photoreduction are the degree of activation of CO2 on the active surface sites of photocatalysts and charge separation/transfer kinetics. In this context, the rational synthesis of heterostructured MXene-coupled CeO2-based photocatalysts with different loading concentrations of Ti3C2MXene via a one-step hydrothermal approach has been undertaken. These photocatalysts exhibit a shift in X-ray diffraction peaks to higher 2θ values and changes in stretching vibrations of 5 wt % Ti3C2MXene/CeO2(5-TC/Ce) that indicate interaction between Ti3C2MXene and CeO2. Moreover, XPS analysis confirms the presence of the Ce3+/Ce4+ states. A sharp band at 2335 cm–1 observed during the CO2 photoreduction process corresponds to bidentate b-CO3 2–, which facilitates the adsorption of CO2 at the surface of the catalyst as revealed by the TPD analysis. Furthermore, the Schryvers test and NMR analysis were undertaken to confirm the formaldehyde intermediate formation during CO2 photoreduction to C2H5OH. The decrease in emission intensity, reduced lifetimes (2.68 ns), and lower interfacial resistance, as revealed by PL, TR-PL, and EIS analysis, imply an efficient charge separation and charge transfer in the case of the Ti3C2MXene/CeO2 heterojunction. The decrease in the intensity of peaks in the EPR spectrum in the case of 5-TC/Ce further confirms efficient charge transfer kinetics across the interface. The optimized 5-TC/Ce shows CO2 reduction with a drastically enhanced yield of ethanol on the order of 6127 μmol g–1 at 5 h with 98% selectivity and 7.54% apparent quantum efficiency, which is 6-fold higher than that of ethanol produced by bare CeO2. Herein, CeO2 that acts as a redox couple (Ce3+/Ce4+) when coupled with MXene having a metallic nature that reduces the electron transfer resistance is in unison, enabling an enhanced mobilization of electrons. Thereby, the synergistic coupling of Ti3C2MXene with CeO2 leads to an efficient photoreduction of CO2 under visible light illumination.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Mishra,

Mrinalini,

Kumar

et al. 2023

Langmuir

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“…Disamping itu juga untuk mengurangi biaya produksi dan mengurangi resiko kerugian dari pedagang apabila bahan makanan tersebut tidak cepat habis terjual. Beberapa penelitian juga menemukan kandungan formalin dalam ikan asin seperti penambahan formalin pada ikan asin di daerah Sulawesi Selatan ditemukan sebesar 0,027-0,0871 ppm (21) , analisis formalin pada ikan asin di Ciroyom ditemukan sebesar 0,0330-0,482 ppm (22) .…”

Section: Kurva Kalibrasi Standar Formalinunclassified

Analisis Kandungan Formalin Pada Ikan Asin Kepala Batu Yang Berada Di Pasar Tradisional Kota Jambi

Lestari¹,

Pratiwi²,

Yuliawati³

2022

j. ilm. manuntung sains farm. kesehat.

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Formalin or formaldehyde belongs to a group of strong disinfectant compounds that are often used as a corpse preservative. Formalin is also often used as a preservative and food additive. The use of Formalin in foodstuffs should not exist because it can endanger the health of the body, where formaldehyde can cause gastric irritation and is carcinogenic. Salted fish is one of the processed fish products that are in great demand by the people of Jambi. This type of preparation has good durability with natural processes, but there are cases where formalin is used as a preservative. This study aims to determine the content of formalin in salted fish found in the Jambi City Traditional Market. This research was conducted descriptively where samples were taken randomly from several markets in Jambi City, Indonesia. The data were analyzed qualitatively to determine the physical characteristics of salted fish. In addition, quantitative analysis was also carried out to determine the level of formalin present in salted fish using a UV-Vis spectrophotometer at a wavelength of 520 nm. Based on the results obtained from 25 samples of Salted Fish Head Stone analyzed, taken from traditional markets namely Market A, Market B, Market C, Market D and Market E, the levels of formalin obtained in each market vary with the highest value in the Mama market. Overall, samples of salted fish of the type of stone head circulating in the traditional markets of Jambi City contain formaldehyde.

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Effect of Aloe vera extract for reducing formaldehyde level in tuna fish for halal and thoyyib food

2020

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This study aims to determine the effect of Aloe vera extract in reducing formaldehyde levels in tuna processed into "pindang" after being given Aloe vera extract. This type of research is experimental. The population in this study was boiled fish sold in the Sawotratap Market. This research was conducted at the Laboratory of Chemistry at the University of Muhammadiyah. Data were analyzed using analysis of variance at a significant level α = 0.05 followed by the Duncan test. The average formaldehyde concentration before being given Aloe vera extract at a concentration of 0% is equal to 23.7 mg / L, and the lowest formalin content in boiled fish with 100% treatment is equal to 5.6 mg / L. Aloe vera extract showed a significant decrease in formaldehyde levels in boiled fish (p <0.05). It can be concluded that the administration of Aloe vera extract is effective in reducing formaldehyde levels.

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ANALYSIS OF FORMALDEHYDE PRESERVATIVES IN WET ANCHOVY (Stolephorus Sp.) FROM TRADITIONAL MARKETS IN MAKASSAR CITY, SOUTH SULAWESI

Cited by 4 publications

References 2 publications

Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Analisis Kandungan Formalin Pada Ikan Asin Kepala Batu Yang Berada Di Pasar Tradisional Kota Jambi

Effect of Aloe vera extract for reducing formaldehyde level in tuna fish for halal and thoyyib food

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ANALYSIS OF FORMALDEHYDE PRESERVATIVES IN WET ANCHOVY (Stolephorus Sp.) FROM TRADITIONAL MARKETS IN MAKASSAR CITY, SOUTH SULAWESI

Cited by 4 publications

References 2 publications

Efficient Photocatalytic CO2 Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Efficient Photocatalytic CO2 Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Analisis Kandungan Formalin Pada Ikan Asin Kepala Batu Yang Berada Di Pasar Tradisional Kota Jambi

Effect of Aloe vera extract for reducing formaldehyde level in tuna fish for halal and thoyyib food

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Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics

Efficient Photocatalytic CO₂ Reduction with High Selectivity for Ethanol by Synergistically Coupled MXene-Ceria and the Charge Carrier Dynamics