Determination of Critical Micelle Concentration of Anionic Surfactants: Comparison of Internal and External Fluorescent Probes

1997 ◽  
Vol 189 (1) ◽  
pp. 177-180 ◽  
Author(s):  
Piyali. Goon ◽  
C. Manohar ◽  
V.V. Kumar
Keyword(s):  
Critical Micelle Concentration ◽  
Fluorescent Probes ◽  
Anionic Surfactants

Dual emissive amphiphilic carbon dots as ratiometric fluorescent probes for the determination of critical micelle concentration of surfactants

2022 ◽  
Author(s):  
Weiwei Lu ◽  
Yun Liu ◽  
Zhiying Zhang ◽  
Junping Xiao ◽  
Chunyan Liu
Keyword(s):  
Critical Micelle Concentration ◽  
Fluorescent Probes ◽  
Carbon Dots ◽  
Good Sensitivity ◽  
Practical Applications ◽  
Simple Operation ◽  
Sensitive Determination

The sensitive determination of critical micelle concentration (CMC) of surfactants is very important for their practical applications. For the good sensitivity and simple operation, pyrene and its derivatives had been...

scholarly journals Fluorescent Probes for Live Cell Thiol Detection

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3575
Author(s):  
Shenggang Wang ◽  
Yue Huang ◽  
Xiangming Guan
Keyword(s):  
Fluorescent Probes ◽  
Biological System ◽  
High Sensitivity ◽  
Intracellular Distribution ◽  
Live Cell ◽  
Live Cells ◽  
High Demand ◽  
Non Invasive

Thiols play vital and irreplaceable roles in the biological system. Abnormality of thiol levels has been linked with various diseases and biological disorders. Thiols are known to distribute unevenly and change dynamically in the biological system. Methods that can determine thiols’ concentration and distribution in live cells are in high demand. In the last two decades, fluorescent probes have emerged as a powerful tool for achieving that goal for the simplicity, high sensitivity, and capability of visualizing the analytes in live cells in a non-invasive way. They also enable the determination of intracellular distribution and dynamitic movement of thiols in the intact native environments. This review focuses on some of the major strategies/mechanisms being used for detecting GSH, Cys/Hcy, and other thiols in live cells via fluorescent probes, and how they are applied at the cellular and subcellular levels. The sensing mechanisms (for GSH and Cys/Hcy) and bio-applications of the probes are illustrated followed by a summary of probes for selectively detecting cellular and subcellular thiols.

scholarly journals Potentiometric Surfactant Sensor Based on 1,3-Dihexadecyl-1H-benzo[d]imidazol-3-ium for Anionic Surfactants in Detergents and Household Care Products

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3627
Author(s):  
Nikola Sakač ◽  
Dubravka Madunić-Čačić ◽  
Dean Marković ◽  
Lucija Hok ◽  
Robert Vianello ◽  
...  
Keyword(s):  
Anionic Surfactants ◽  
Negative Impact ◽  
Ion Pair ◽  
Two Phase ◽  
Potentiometric Response ◽  
Titration Curves ◽  
Signal Change ◽  
Nernstian Slope ◽  
Good Agreement

A 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-tetraphenylborate (DHBI-TPB) ion-pair implemented in DHBI-TPB surfactant sensor was used for the potentiometric quantification of anionic surfactants in detergents and commercial household care products. The DHBI-TPB ion-pair was characterized by FTIR spectroscopy and computational analysis which revealed a crucial contribution of the C–H∙∙∙π contacts for the optimal complex formation. The DHBI-TPB sensor potentiometric response showed excellent analytical properties and Nernstian slope for SDS (60.1 mV/decade) with LOD 3.2 × 10−7 M; and DBS (58.4 mV/decade) with LOD 6.1 × 10−7 M was obtained. The sensor possesses exceptional resistance to different organic and inorganic interferences in broad pH (2–10) range. DMIC used as a titrant demonstrated superior analytical performances for potentiometric titrations of SDS, compared to other tested cationic surfactants (DMIC > CTAB > CPC > Hyamine 1622). The combination of DHBI-TPB sensor and DMIC was successfully employed to perform titrations of the highly soluble alkane sulfonate homologues. Nonionic surfactants (increased concentration and number of EO groups) had a negative impact on anionic surfactant titration curves and a signal change. The DHBI-TPB sensor was effectively employed for the determination of technical grade anionic surfactants presenting the recoveries from 99.5 to 101.3%. The sensor was applied on twelve powered samples as well as liquid-gel and handwashing home care detergents containing anionic surfactants. The obtained results showed good agreement compared to the outcomes measured by ISE surfactant sensor and a two-phase titration method. The developed DHBI-TPB surfactant sensor could be used for quality control in industry and has great potential in environmental monitoring.

scholarly journals Polarographic determination of anionic surfactants by the desorption potentials

1972 ◽  
Vol 21 (4) ◽  
pp. 517-521 ◽  
Author(s):  
Noriko SHINOZUKA ◽  
Hajime SUZUKI ◽  
Shigeo HAYANO
Keyword(s):  
Anionic Surfactants ◽  
Polarographic Determination

Isonicotinamide-Stabilized Gold Nanoclusters as Fluorescent Probes for the Determination of 2,4,6-Trinitrophenol

2021 ◽  
pp. 1-10
Author(s):  
Chao Zeng ◽  
Chenxia Xie ◽  
Min Zhang ◽  
Chengdu Cao ◽  
Luohua Guo ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Gold Nanoclusters
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