1. Table 1. Summary of spectrophotometry methods
Principle
Wavelength
Linear range
LOD
LOQ
Application
Ref
Diazotization with 1 % sodium nitrite and HCl followed by coupling with ß-naphthol in 4% NaOH.
560 nm
1-10 μg/ml -
1 μg/ml
Tablets
[24]
Fluorimetry: Dilution in methanolic 0.1 N H2SO4
λex 246 nm and λem 382 nm
ng/ml
25 ng/ml
[25]
Fluorimetry: based on the application of hydrophobic 1-Hexylpyridinium hexafluorophosphate [Hpy][PF6] ionic liquid (IL) as a microextraction solvent was proposed to preconcentrate terazosin.
λem 376 nm & λex 330 nm.
0.1 to 115 μg L−1
0.027 µg/ml
Urine and plasma
[26]
Spectrofluorimetry
λex/em = 280/413 nm
0–9 × 10−6 mol l−1
0.21 mg l−1
Interactions between terazosin and bovine serum albumin (BSA)
[27]
Spectrofluorimetry. Acetic acid 1 mol L−1 in ethanol was used as diluting agent [Slit width 1.5 nm both Ex and Em]
λex 332 nm and λem 382 nm.
1×10−5 to 7.0 μgmL−1
3.04×10−4 µg/ml
1.0×10−3 µg/ml
[28]
Spectrofluorimetry. Acetic acid 1 mol L−1 in ethanol was used as diluting agent [Slit width 5 nm both Ex and Em]
λex 332 nm and λem 382 nm
1.11×10−5 µg/ml
3.7×10−5 µg/ml
Tablets and urine samples
Direct measurements of the first and second derivative spectra of samples
D1 = 340, D2 = 345 nm
4-18 μgmL−1
Determination in the presence of degradation product
[29]
The reaction of with chloranil (CH) in aqueous solution of pH 9 to give an intense yellow color
340 nm
24-45 μgmL−1
The reaction of the drug with mercurochrome (MER) in aqueous alkaline medium to give an intense red color
543 nm
4-12 μgmL−1
Ion-pair salt between the drug and bromocresol purple (BCP)
412 nm
4-20 μgmL−1
Fluorimetry
λex 390 nm and λem 382 nm.
μgmL−1
Ion pair complex with dyes bromocresol green, bromothymol blue, methyl orange and alizarine red in acidic buffer pH
419, 415, 425 and 428 nm resp.
μgmL−1 resp
0.186, 0.106, 0.286, μg ml−1 resp.
0.619, 0.353, 0.954, μg ml−1 resp.
Pure and tablets
[30]
Alankar Shrivastava et al. Various Analytical Methods for the Determination of Terazosin in Different Matrices. World Journal of Analytical Chemistry, 2013, Vol. 1, No. 4, doi: /wjac-1-4-7
© The Author(s) Published by Science and Education Publishing.