Spectrophotometric determination of carmoisine after cloud point extraction using Triton X-114

Karatepe, Aslıhan; Akalin, Cagri; Soylak, Mustafa

doi:10.3906/kim-1606-45

Cited by 26 publications

(13 citation statements)

References 20 publications

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“…Recent studies show that synthetic azo dyes cause children hyperactivity therefore their amount in foods should be controlled . Classical methods such as spectrophotometry, electrophoresis, or liquid chromatography can be used for Carmoisine determination in foods. However, today the cost and simplification of analytical methods is an increasingly urgent task.…”

Section: Introductionmentioning

confidence: 99%

Determination of Carmoisine onto Carbon‐Paste Electrode Modified by Silica Impregnated with Cetylpyridinium Chloride

2020

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In this paper a simple, cheap and sensitive electrochemical sensor for determination of Carmoisine in soft drinks was developed. Carmoisine is a synthetic azo dye which is used in food products. In this work effective voltammetric sensor based on carbon‐paste electrode modified by silica impregnated with cetylpyridinium chloride to increase the sensitivity of Carmoisine detection was proposed. The voltammetric behavior of Carmoisine, the number of protons and electrons involved in the oxidation process were studied. The probable mechanism of Carmoisine oxidation on the developed sensor was suggested. The optimal conditions for the square‐wave voltammetric determination of Carmoisine onto developed sensor were found to be: pH=2; Eads=400 mV; tads=300s; A=50 mV; ν=25 Hz, υ=100 mV/s. The calibration curve was linear in the range of Carmoisine concentrations 0,08‐1 μM. The proposed method was successfully tested in the analysis of Carmoisine in soft drinks with RSD not more than 5%.

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Section: Introductionmentioning

confidence: 99%

Determination of Carmoisine onto Carbon‐Paste Electrode Modified by Silica Impregnated with Cetylpyridinium Chloride

2020

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“…Denilebilir ki, günümüzde, bir şekilde yürütme yetkisi ile ilişkilendirilemeyecek hiçbir devlet faaliyeti kalmamış gibidir. Ülkenin iç ve dış güvenliğini sağlamak; kamu düzenini ve genel ahlakı korumak; eğitim, sağlık, sosyal güvenlik gibi genel hizmetleri gerçekleştirmek; kalkınma için gerekli altyapı yatırımlarını yapmak, yürütme organının görev alanına giren hususlardan sadece bazılarıdır 54 .…”

Section: A Cumhurbaşkanı Sadece Yürütme Yetkisine İlişkin Konularda Kararname çıKarabilirunclassified

2017 Anayasa Değişiklikleri Çerçevesinde Cumhurbaşkanlığı Kararnameleri

Açil¹

2020

mecmua

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Öz 2017 Anayasa değişiklikleri ile Cumhurbaşkanı'na yürütme yetkisine ilişkin konularda kararname çıkarma yetkisi verilmiştir. Cumhurbaşkanlığı kararnameleri, yürütmenin diğer düzenleyici işlemlerinin aksine, kanuna dayanmak zorunda değildir. Bu kararnamelerle daha önce kanuna konu olmamış bir alan, ilk elden düzenlenebilecektir. Cumhurbaşkanı'nın kararname çıkarabilmek için TBMM'den yetki almasına gerek olmadığı gibi, çıkarılan kararnamelerin onay için TBMM'ye sunulması da gerekmez. Ayrıca bazı alanlarda kanun çıkarılması yasaklanmış ve bu alanların münhasıran Cumhurbaşkanlığı kararnameleri ile düzenlenmesi öngörülmüştür. AbstractWith the Constitutional amendments of 2017, the president has been authorized to issue decrees on the subject about executive powers. Unlike the other regulations of the executive, the presidential decrees do not have to be based on the law. With this decrees, a field that was not a subject of law before can be regulated initially. The President does not need to obtain authorization from the TBMM in order to be able to issue a decree, nor does (s)he need to present the decree to the TBMM for approval. Moreover, it is forbidden to enact laws in some fields and it is envisaged that these fields should be regulated exclusively by the presidential decree.

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“…Spectrophotometric determination of dyes could be problem because of low levels of dyes and interference effect of matrix in real samples (Bişgin et al, 2015). Therefore, various analytical methods combined with UV-Vis spectrometry such as cloud point extraction (CPE) (Karatepe et al, 2017;Pourreza and Zareian, 2009), dispersive liquid-liquid micro extraction (DLLME) (Bazregar et al, 2018) and solid-phase extraction (SPE) (Yu and Fan, 2016) have been developed for determination of food dyes. CPE is a separation, purification and enrichment procedure which has been widely applied for detection and determination of trace harmful substance in different matrixes such as heavy metal ions (Li et al, 2017) and dyes (Heidarizadi and Tabaraki, 2016;Nambiar et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Cloud Point Extraction and Spectrophotometric Determination of Allura Red (E129) in Foodstuffs

Bişgin

2018

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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A new cloud point extraction method was developed for preconcentration of allura red food dye as a prior step to its spectrophotometric determination by UV-Vis spectrometry. Allura red was determined at 506 nm. Extraction parameters such as H 2 SO 4 and surfactant concentrations, equilibration time and temperature were investigated and optimized. Interference efects of matrix components were investigated. Preconcentration factor of the method was obtained as 25. The relative standard deviations of the method were lower than 6%. Detection limit and quantitation limit of the method were determined as 3.0 and 8.5 ng mL -1 , respectively. Linear calibration curve was plotted in the range of 0-6 μg mL -1 . Finally, the method was successfully applied to foodstuffs to determine the allura red contents of energy drink, candy, drink powder, syrup and jelly samples. Allura red concentrations of foodstuffs were determined between 9-499 μg g -1 and 47-231 μg mL -1 for solid and liquid samples, respectively.ÖZET: Allura kırmızısı gıda boyasının UV-Vis spektrometresi ile spektrofotometrik tayini öncesi ön deriştirme basamağı olarak yeni bir bulutlanma noktası ekstraksiyon metodu geliştirilmiştir. Allura red 506 nm'de tayin edilmiştir. H 2 SO 4 ve yüzey aktif madde konsantrasyonu, denge zamanı ve sıcaklığı gibi ekstraksiyon parametreleri incelenmiş ve optimize edilmiştir. Matris bileşenlerinin analize girişim etkisi incelendi. Metodun zenginleştirme faktörü 25 olarak saptandı. Metodun bağıl standart sapması 6% değerinin altında bulunmuştur. Metodun gözlenebilme ve tayin sınır değerleri sırası ile 3.0 ve 8.5 ng mL -1 olarak tayin edilmiştir. 0 ile 6 μg mL -1 değerleri arasında doğrusal kalibrasyon eğrisi çizilmiştir. Son olarak, metot, allura kırmızı boyası içeriğini tayin etmek amacıyla allura kırmızısı boyası içeren enerji içeceği, şeker, meşrubat tozu, şurup ve jöle örneklerine uygulanmıştır. Katı ve sıvı gıda maddeleri örneklerinin allura kırmızısı konsantrasyonları sırası ile 9-499 μg g -1 ve 47-231 μg mL -1 değerleri arasında tayin edilmiştir.Anahtar Kelimeler: Allura kırmızısı, bulutlanma noktası ekstraksiyonu, gıdalar, spektrofotometri.

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Spectrophotometric determination of carmoisine after cloud point extraction using Triton X-114

Cited by 26 publications

References 20 publications

Determination of Carmoisine onto Carbon‐Paste Electrode Modified by Silica Impregnated with Cetylpyridinium Chloride

Determination of Carmoisine onto Carbon‐Paste Electrode Modified by Silica Impregnated with Cetylpyridinium Chloride

2017 Anayasa Değişiklikleri Çerçevesinde Cumhurbaşkanlığı Kararnameleri

Cloud Point Extraction and Spectrophotometric Determination of Allura Red (E129) in Foodstuffs

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