Sensitive and Selective Spectrophotometric Determination of Hg(II), Ni(II), Cu(II) and Co(II) Using Iminodibenzyl and 3-Chloroiminodibenzyl as New Reagents and Their Applications to Industrial Effluents and Soil Samples

Novel oxidative electrophilic coupling reactions of phenoxazine derivatives with MBTH and their applications to spectrophotometric determination of residual chlorine in drinking water and environmental water samples

“…Electrophilic coupling reaction has attracted considerable attention for quantitative analysis of many environmental toxicants [33,34]. The mechanism of the reaction between PNZ, CPN or TPN, MBTH and RSC in acidic medium to yield a blue color was postulated in Fig.…”

Spectrophotometric determination of aluminium and indium with 2,2′,3,4-tetrahydroxy-3′,5′-disulphoazobenzene

“…UV spectrophotometry amongst the optical methods seems to be most appropriate analytical approach for the determination of toxic metals, as it provides sensitive, precise and accurate measurement of suitable analytes. Besides, visible spectrophotometric detection is much more viable as useful technique to develop a portable, on-line or at-line system [30].…”

Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry

“…UV spectrophotometry amongst the optical methods seems to be the most appropriate analytical approach for the determination of toxic metals, as it provides sensitive, precise and accurate measurement of suitable analytes. Besides, visible spectrophotometric detection is much more viable as a useful technique to develop a portable, online or at‐line system . Many spectrophotometric methods can be found in the literature for mercury determination using complexing agents such as 4‐(2‐pyridylazo)‐resorcinol , 1,3‐di‐(4‐nitrodiazoamino)‐benzene , o ‐carboxy phenyl diazoamino p ‐asobenzene , potassium iodide , 2‐mercaptobenzothiazole (MBT) and 5‐(p‐aminobenzylidene)‐thaioyhiorhodamine .…”