Spectrophotometric Determination of Water Content in Alcohol Organic Solvents

2007 ◽  
Vol 54 (3) ◽  
pp. 619-624 ◽  
Author(s):  
Hai-Xin Bai ◽  
Xiu-Rong Yang
Keyword(s):  
Water Content ◽  
Organic Solvents ◽  
Spectrophotometric Determination

scholarly journals DETERMINATION OF TRACE NITRITE AS 4-(4-NITROBENZENAZO)- 1-AMINONAPHTHALENE COMPLEX BY EXTRACTION-SPECTROPHOTOMETRY

2010 ◽  
Vol 9 (2) ◽  
pp. 254-260
Author(s):  
Choirul Amri ◽  
Dwi Siswanta ◽  
Mudasir Mudasir
Keyword(s):  
Detection Limit ◽  
Organic Solvents ◽  
Spectrophotometric Determination ◽  
Spectrophotometric Method ◽  
Limit Of Detection ◽  
Absorbance Unit ◽  
Extraction Spectrophotometry ◽  
Linear Concentration

A study of extraction-spectrophotometric method for the determination of trace nitrite as 4-(4-nitrobenzenazo)-1-aminonaphthalene complex using n-amylalcohol and chloroform as organic solvents has been done. Results of the study showed that extraction-spectrophotometric determination of nitrite using n-amylalcohol or chloroform was very sensitive and had low limit of detection. Extraction-spectrophotometric method of nitrite using n-amylalcohol gave range of linear concentration 0.000-0.054 mg/L NO2--N, detection limit of 2.09x10-4 mg/L NO2--N, and sensitivity of 34.514 ± 0.398 absorbance unit per mg/L of NO2--N. Meanwhile, extraction-spectrophotometric of nitrite using chloroform had range of linear concentration of 0.000-0.100 mg/L NO2--N, detection limit of 8.99x10-4 mg/L NO2--N, and sensitivity of 18.353 ± 0.456 absorbance unit per mg/L NO2--N.   Keywords: Nitrite Trace, 4-(4-Nitrobenzenazo)-1-Aminonaphthalene, Extraction-Spectrophotometry

A phosphorescent Ir(iii) complex with formamide for the luminescence determination of low-level water content in organic solvents

2016 ◽  
Vol 4 (25) ◽  
pp. 6110-6116 ◽  
Author(s):  
Song Guo ◽  
Yun Ma ◽  
Shujuan Liu ◽  
Qi Yu ◽  
Aqiang Xu ◽  
...  
Keyword(s):  
Water Content ◽  
Organic Solvents ◽  
Time Resolved ◽  
Low Level

A novel formamide-containing Ir(iii) complex was designed and synthesized for the determination of water content with low LOD and LOQ by a time-resolved luminescence technique.

Infrared Spectrophotometric Determination of Trace Water in Selected Organic Solvents

1978 ◽  
Vol 32 (1) ◽  
pp. 93-98 ◽  
Author(s):  
Angelo Barbetta ◽  
Walter Edgell
Keyword(s):  
Organic Solvents ◽  
Spectrophotometric Determination ◽  
Water Analysis ◽  
Spectrophotometric Method ◽  
Molecular Sieves ◽  
Solvent Absorption ◽  
Trace Water

A spectrophotometric method of trace water analysis in organic solvents is reported. It is based on the water fundamental at 2.8 µ and has been applied to hexamethylphosphoramide, nitromethane, acetonitrile, oxetane, dimethylsulfoxide, 1,1-dimethoxyethane, dimethylformamide, tetrahydrofuran, 2-methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran, tetrahydropyran, 1,2-dimethoxyethane, n-butylmethylether, and pyridine. Methods for dealing with solvent absorption and water pickup by samples, and the preparation of water-free samples for reference are discussed. Some comments are made on drying these solvents with molecular sieves.

scholarly journals Determination of Water Content in Organic Solvents by Naphthalimide Derivative Fluorescent Probe

2010 ◽  
Vol 26 (6) ◽  
pp. 671-674 ◽  
Author(s):  
Chenggang NIU ◽  
Lemei LI ◽  
Pinzhu QIN ◽  
Guangming ZENG ◽  
Yan ZHANG
Keyword(s):  
Water Content ◽  
Fluorescent Probe ◽  
Organic Solvents

Further Study of the Spectrophotometric Determination of Capsaicin

1979 ◽  
Vol 62 (5) ◽  
pp. 1168-1170
Author(s):  
José Jorge Ramos Palacio
Keyword(s):  
Ethyl Acetate ◽  
Water Content ◽  
Spectrophotometric Determination ◽  
Optimum Concentration ◽  
Colorimetric Reaction

Abstract This study has been undertaken to clarify the previous work on the determination of capsaicin so that the results will be more uniform. For a good colorimetric reaction, the ethyl acetate should have a low water content; 0.1% is optimum concentration for vanadium oxytrichloride. In samples with low Scoville rating, paprika pigment can interfere with the analysis. The absorbance due to this pigment has been studied to determine the absorbance due to capsaicin.

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