The effect of cetyltrimethyl ammonium bromide on the electrochemical determination of thyroxine

2004 ◽  
Vol 35 (2) ◽  
pp. 93-98 ◽  
Author(s):  
Qiong He ◽  
Xueping Dang ◽  
Chengguo Hu ◽  
Shengshui Hu
2010 ◽  
Vol 22 (20) ◽  
pp. 2330-2338 ◽  
Author(s):  
Rajendra N. Goyal ◽  
Sanghamitra Chatterjee ◽  
Anoop Raj Singh Rana

2017 ◽  
Vol 100 (1) ◽  
pp. 224-229 ◽  
Author(s):  
Nasrin Taghipour Birgani ◽  
Shahla Elhami

Abstract A simple and sensitive method was proposed for the preconcentration of trace levels of Al(III) prior to its determination by spectrophotometry, based on dispersive liquid–liquid microextraction. The complexation of the Al(III) was performed by chelation with Eriochrome Cyanine R (ECR). In this method, cetyltrimethyl ammonium bromide (CTAB) as a dispersant was dissolved in chloroform as an extractant solvent, and then the solution was rapidly injected by a syringe into the samples containing Al(III), which had already been complexed by ECR at optimized pH. Various parameters were studied and optimized for a 10 mL sample volume. Under the optimum conditions, the LOD (3 times the SD of 10 replicate readings of the reagent blank) and the dynamic range of the calibration obtained were 0.2 ng mL−1 (7 nM) and 1.0–80.0 ng mL−1, respectively. The RSDs for eight replicate determinations of10 and 60 ng mL−1 of Al(III) were 3.3 and 1.8%, respectively. This strategy was successfully applied to determine the Al concentration in water, wastewater,yogurt, apple, carrot, celery, bread, potato, urine, and Al–Mg syrup samples.


RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49045-49053 ◽  
Author(s):  
Jayant I. Gowda ◽  
Danavva G. Gunjiganvi ◽  
Nagaveni B. Sunagar ◽  
Manjushree N. Bhat ◽  
Sharanappa T. Nandibewoor

An electrochemical sensor for the sensitive detection of paracetamol (PCM) was developed by constructing a glassy carbon electrode (GCE) modified with multiwalled carbon nanotube–cetyltrimethyl ammonium bromide (MWCNT–CTAB).


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