scholarly journals On the Determination of the Colour-equivalent of a Star, with special reference to the Effective Wave-length and its Relation to Spectral Class: A Review of the Different Methods

1922 ◽  
Vol 82 (9) ◽  
pp. 495-510
Author(s):  
K. Lundmark ◽  
W. J. Luyten
Keyword(s):  
Special Reference ◽  
Wave Length ◽  
Class A ◽  
Spectral Class ◽  
Effective Wave

scholarly journals CORRESPONDENCE. THE ANALYSIS OF POTABLE WATER WITH SPECIAL REFERENCE TO THE DETERMINATION OF PREVIOUS SEWAGE CONTAMINATION.

1882 ◽  
Vol 68 (1882) ◽  
pp. 103-115
Author(s):  
H P BOULNOIS ◽  
E CHADWICK ◽  
C E DE RANCE ◽  
H U MCKIE ◽  
H ROBINSON ◽  
...  
Keyword(s):  
Special Reference ◽  
Potable Water ◽  
Sewage Contamination

ESTIMATION OF TADALAFIL IN HUMAN PLASMA BY SPECTROFLUOROPHOTOMETRY

INDIAN DRUGS ◽  
2021 ◽  
Vol 58 (06) ◽  
pp. 60-63
Author(s):  
Sadhana Rajput ◽  
◽  
Samir Patel ◽  
Keyword(s):  
Human Plasma ◽  
Fluorescence Spectrum ◽  
Drug Monitoring ◽  
Limit Of Detection ◽  
Wave Length ◽  
Excitation Wavelength ◽  
Limit Of Quantification ◽  
Pharmacokinetic Investigation ◽  
Satisfactory Recovery

A new, specific, selective, simple, rapid and inexpensive spectrofluorophotometric method has been developed for the determination of tadalafil in spiked human plasma. The fluorescence spectrum of tadalafil in 0.1M methanolic sulphuric acid showed excitation wavelength at 315 nm and emission wave-length at 332 nm. The method for tadalafil was found to be linear over the concentration range of 10-50 ng/mL with a correlation coefficient of 0.9991. Limit of detection and limit of quantification were found to be 0.235 ng/mL and 0.701 ng/mL, respectively. The method was validated and found to be suitable for the estimation of tadalafil from human plasma. Satisfactory recovery of tadalafil from the human plasma suggests no interference of any debris present into human plasma. This method can be used to deter-mine plasma tadalafil concentration in drug monitoring or pharmacokinetic investigation.

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