Synthesis of New Reagent Benzyloxybenzaldehydethiosemicarbazone (BBTSC): Selective, Sensitive and Extractive Spectrophotometric Determination of Pd(II) in Water Samples and Synthetic Mixtures

2007 ◽  
Vol 54 (5) ◽  
pp. 1233-1241 ◽  
Author(s):  
Suvarapu Lakshmi Narayana ◽  
Koduru Janardhan Reddy ◽  
Somala Adi Narayana Reddy ◽  
Jyothi Rajesh Kumar ◽  
Ammireddy Varada Reddy
Keyword(s):  
Spectrophotometric Determination ◽  
Water Samples

Optimization of an analytical method for the spectrophotometric determination of copper in tea and water samples after ultrasonic assisted cloud point extraction using a benzothiazole fluorescein derivative complexing agent

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65321-65327 ◽  
Author(s):  
Chunlei Fan ◽  
Shengxu Luo ◽  
Rong Liu
Keyword(s):  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Water Samples ◽  
Analytical Method ◽  
Cloud Point Extraction ◽  
Complexing Agent ◽  
Ultrasonic Assisted ◽  
Determination Of Copper

BTF is exists with spirolactone species with adding Cu2+, which leads to the absorbance intensity is decreased gradually and the decrease of the absorbance value is linear for Cu2+.

scholarly journals Spectrophotometric determination of triclosan based on diazotization reaction: response surface optimization using Box–Behnken design

2018 ◽  
Vol 77 (9) ◽  
pp. 2204-2212 ◽  
Author(s):  
Inderpreet Kaur ◽  
Sonal Gaba ◽  
Sukhraj Kaur ◽  
Rajeev Kumar ◽  
Jyoti Chawla
Keyword(s):  
Response Surface ◽  
Spectrophotometric Determination ◽  
Sodium Nitrite ◽  
Water Samples ◽  
Experimental Conditions ◽  
Box Behnken Design ◽  
Response Surface Optimization ◽  
Diazonium Ion ◽  
Yellowish Orange

Abstract A spectrophotometric method based on diazotization of aniline with triclosan has been developed for the determination of triclosan in water samples. The diazotization process involves two steps: (1) reaction of aniline with sodium nitrite in an acidic medium to form diazonium ion and (2) reaction of diazonium ion with triclosan to form a yellowish-orange azo compound in an alkaline medium. The resulting yellowish-orange product has a maximum absorption at 352 nm which allows the determination of triclosan in aqueous solution in the linear concentration range of 0.1–3.0 μM with R2 = 0.998. The concentration of hydrochloric acid, sodium nitrite, and aniline was optimized for diazotization reaction to achieve good spectrophotometric determination of triclosan. The optimization of experimental conditions for spectrophotometric determination of triclosan in terms of concentration of sodium nitrite, hydrogen chloride and aniline was also carried out by using Box–Behnken design of response surface methodology and results obtained were in agreement with the experimentally optimized values. The proposed method was then successfully applied for analyses of triclosan content in water samples.

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