Acid–base titration using a microfluidic thread-based analytical device (μTAD)

The Analyst ◽  
2020 ◽  
Vol 145 (13) ◽  
pp. 4457-4466
Author(s):  
Purim Jarujamrus ◽  
Akarapong Prakobkij ◽  
Sodsai Puchum ◽  
Sawida Chaisamdaeng ◽  
Rattapol Meelapsom ◽  
...  
Keyword(s):  
Analytical Approach ◽  
Acid Base ◽  
Acid Base Titration ◽  
Acid And Base ◽  
Analytical Device

This work presents a novel analytical approach for precise and quick (within 2 minutes) determination of acid and base concentrations (of very small amount) by titration using a microfluidic thread-based analytical device (μTAD).

scholarly journals Inventarisasi Tanaman Berpotensi Sebagai Indikator Asam-Basa Alami Di Kota Kupang

bionature ◽  
2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Nur R. Adawiyah Mahmud ◽  
Ihwan Ihwan ◽  
Nur Jannah
Keyword(s):  
Color Change ◽  
Curcuma Longa ◽  
Piper Betle ◽  
Acid Base ◽  
Sesbania Grandiflora ◽  
Base Solution ◽  
Synthetic Indicator ◽  
Acid Base Titration ◽  
Acid And Base ◽  
Bougainvillea Spectabilis

Abstract.  This study investigated a natural acid-base indicator which is extracted from plants in Kupang city. There are 14 plants that potential as a source of natural indicator for acid base titration, i.e, Kol Ungu (Brassica oleracea Capitata Group), Turi Merah flower (Sesbania grandiflora L. Pers), Belimbing Wuluh flower (Averhoa bilimbi L), Kaktus Merah fruit (Opuntia vulgaris Mill), Ruelia flower (Ruellia simplex), Flamboyan flower (Delonix regia), bugenvil flower (Bougainvillea spectabilis Willd.), Bayam Merah leaves (Amaranthus tricolor L.) Jamblang fruit (Syzygium cumini L.), Murbey fruit (Morus alba L.), Pinang fruit (Areca catechu L.), Sirih fruit (Piper betle L.), Kunyit (Curcuma longa Linn), and Nanas Kerang leaves (Rhoeo discolor). Plants extract shows a sharp color change in acid and base solution. Promising results as a natural indicator also shown in acid base titration which is have similar equivalent point to synthetic indicator. We can use these natural indicators as an alternative to synthetic indicator because they are found to be simple, very useful, cheap, easy to extract, accurate, and eco-friendly. Keywords: Plant, Natural indicator, Acid-Base

scholarly journals The Potential of Clitoria ternatea L. Extracts as an Alternative Indicator in Acid-Base Titration

2021 ◽  
Vol 5 (4) ◽  
pp. 340-352
Author(s):  
Camalin Bela Sukmaning Fitri* ◽  
Retno Aliyatul Fikroh
Keyword(s):  
Experimental Design ◽  
Base Material ◽  
Chemistry Curriculum ◽  
Acid Base ◽  
Flower Extract ◽  
Synthetic Indicators ◽  
Base Materials ◽  
Acid Base Titration ◽  
Acid And Base ◽  
Butterfly Pea

Experiments are an important part of the chemistry curriculum. An indicator in the form of a synthesis indicator is commonly used in acid-base materials experiments. The usage of synthetic indicators can result in waste that is both environmentally harmful and costly. The butterfly pea flower is one of the plants that contains anthocyanins, which have the potential to be used as an alternative indication of natural acids and bases. The study aims to determine the acid and base material curriculum and competency indicators, as well as the potential of butterfly pea flower extract as a substitute for synthesis indicators and the practicality of butterfly pea flower extract as a chemical experimental design in SMA/MA. This study employs a descriptive qualitative research method that includes literature review, observation, experimentation, and interviewing. The results showed that the relationship between acid-base materials and experiments was the determination of natural materials as acid-base indicators, the pH of the solution, the identification of acid-base properties, and acid-base titration. The butterfly pea flower indicator was produced from maceration extraction using 96% ethanol as the solvent. The butterfly pea flower indicator gives pink color at pH 1-2, reddish purple at pH 3, light purple at pH 4-5, turquoise at pH 6, bluish green at pH 7, light blue at pH 8-9, green at pH 10, yellowish green at pH 11, greenish yellow at pH 12-13, and yellow at pH 14. The titration step showed that butterfly pea flower indicators could replace synthetic indicators, namely phenolphthalein and methyl orange. Based on the analysis, the butterfly pea flower indicator can be used as an alternative indicator in acid base titration and an alternative experimental design in schools.

scholarly journals Studi Morfologi Stomata Daun Glodokan (Polyalthia longifolia Sonn) pada Lingkungan Berbeda

bionature ◽  
2019 ◽  
Vol 20 (2) ◽  
pp. 109
Author(s):  
Asmawati Munir ◽  
Lili Darlian ◽  
Sri Nurjaya
Keyword(s):  
Color Change ◽  
Curcuma Longa ◽  
Piper Betle ◽  
Acid Base ◽  
Sesbania Grandiflora ◽  
Base Solution ◽  
Synthetic Indicator ◽  
Acid Base Titration ◽  
Acid And Base ◽  
Polyalthia Longifolia

Abstract. This study investigated a natural acid-base indicator which is extracted from plants in Kupang city. There are 14 plants that potential as a source of natural indicator for acid base titration, i.e, KolUngu (Brassica oleracea Capitata Group), Turi Merah flower (Sesbania grandiflora L. Pers), BelimbingWuluh flower (Averhoa bilimbi L), Kaktus Merah fruit (Opuntia vulgaris Mill), Ruelia flower (Ruellia simplex), Flamboyan flower (Delonix regia), bugenvil flower (Bougainvillea spectabilisWilld.), Bayam Merah leaves (Amaranthus tricolor L.) Jamblang fruit (Syzygiumcumini L.), Murbey fruit (Morus alba L.), Pinang fruit (Areca catechu L.), Sirih fruit (Piper betle L.), Kunyit (Curcuma longa Linn), and Nanas Kerang leaves (Rhoeo discolor). Plants extract shows a sharp color change in acid and base solution. Promising results as a natural indicator also shown in acid base titration which is have similar equivalent point to synthetic indicator. We can use these natural indicators as an alternative to synthetic indicator because they are found to be simple, very useful, cheap, easy to extract, accurate, and eco-friendly. Keywords: plant, natural indicator, acidbase.

Determination Methods of Dialdehyde Celluloses from Bacterial Cellulose

2007 ◽  
Vol 361-363 ◽  
pp. 507-510
Author(s):  
Yu Hong Feng ◽  
Jia Cheng Li ◽  
Qiang Lin ◽  
Su Juan Pang ◽  
Meng Ying Zhang ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Amino Nitrogen ◽  
Aldehyde Group ◽  
Acid Base ◽  
Titration Method ◽  
Cannizzaro Reaction ◽  
Acid Base Titration ◽  
Determination Methods ◽  
Oxidation System

This paper addresses the determination of aldehyde group (% of dialdehyde units) in dialdehyde cellulose (DACs) oxidized from bacterial cellulose (BC). With 4 determination methods, the oxidation degrees of DACs were studied: Automatic potential titration method through Schiff base reaction, Acid-base titration in Cannizzaro reaction, Metaperiodate consumption determination, and Measurement of amino nitrogen content in DAC derivatives. By comparing determination results of these methods, we found out the proper way suitable for this metaperiodate oxidation system of BC to measure the dialdehyde unit content of the DACs.

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