Optical Determination of Low-Level Water Concentrations in Organic Solvents Using Fluorescent Acridinyl Dyes and Dye-Immobilized Polymer Membranes

2001 ◽  
Vol 73 (21) ◽  
pp. 5339-5345 ◽  
Author(s):  
Daniel Citterio ◽  
Katsuya Minamihashi ◽  
Yuka Kuniyoshi ◽  
Hideaki Hisamoto ◽  
Shin-ichi Sasaki ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Polymer Membranes ◽  
Low Level ◽  
Optical Determination

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.

UNTERSUCHUNGEN ÜBER DIE EXTRAKTION DES ROTEN KOBER-FARBSTOFFS DURCH ORGANISCHE LÖSUNGSMITTEL ZUR ÖSTROGENBESTIMMUNG IM HARN

1960 ◽  
Vol XXXV (I) ◽  
pp. 34-48 ◽  
Author(s):  
Gerd Ittrich
Keyword(s):  
Menstrual Cycle ◽  
Organic Solvents ◽  
Urine Sample ◽  
Phenol Derivatives ◽  
Organische Lösungsmittel ◽  
Colour Complex

ABSTRACT A series of organic solvents and phenol derivatives have been examined for the extraction of the pink Kober-colour complex. Optimal results could be achieved for fluorimetry by a solution of 2 % (w/v) p-nitrophenol and 1 % (v/v) ethanol in acetylenetetrabromide, when the green mercury line (546 mμ was used as primary light. The sensitivity, stability and specificity have been improved, compared with the previously described reaction. By changing the sequence of purification steps and by reducing the volume of the urine sample (5 ml) the method for the determination of total oestrogens has been simplified. Approximately 10 determinations can be done within 3–4 hours by one person. Recovery experiments and comparative determinations with a previously described method have been carried out. The excretion of total oestrogens in a complete menstrual cycle is determined with the described method.

Generic method for determination of volatile organic solvents in cosmetics

2014 ◽  
Vol 32 (11) ◽  
pp. 1251
Author(s):  
Jing DA ◽  
Xianglu HUANG ◽  
Gangli WANG ◽  
Jin CAO ◽  
Qingsheng ZHANG
Keyword(s):  
Organic Solvents ◽  
Volatile Organic

Determination of low-level anions in seawater by ion chromatography with cycling-column-switching

2012 ◽  
Vol 1265 ◽  
pp. 186-190 ◽  
Author(s):  
Ruiqi Wang ◽  
Nani Wang ◽  
Mingli Ye ◽  
Yan Zhu
Keyword(s):  
Ion Chromatography ◽  
Column Switching ◽  
Low Level

scholarly journals Determination of low-level biogenic gasoline, jet fuel, and diesel in blends using the direct liquid scintillation counting method for 14C content

Fuel ◽  
2021 ◽  
Vol 291 ◽  
pp. 120084
Author(s):  
Charles G. Doll ◽  
Andrew E. Plymale ◽  
Alan Cooper ◽  
Igor Kutnyakov ◽  
Marie Swita ◽  
...  
Keyword(s):  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Jet Fuel ◽  
Scintillation Counting ◽  
Counting Method ◽  
Low Level

Colorimetric Determination of Aklomide (2-Chloro-4-Nitrobenzamide) in Poultry Feed

1969 ◽  
Vol 52 (3) ◽  
pp. 438-441
Author(s):  
Glenn M George ◽  
A C Daftsios ◽  
Joseph L Morrison
Keyword(s):  
Nitro Group ◽  
Poultry Feed ◽  
Colorimetric Determination ◽  
Average Recovery ◽  
Low Level ◽  
Color Development ◽  
Titanium Trichloride ◽  
High Level

Abstract The coccidiostat aklomide is extracted from feed with methanol and assayed colorimetrically by reduction of the nitro group to anamine with titanium trichloride and subsequent color development with t he Bratton-Marshall reaction. Thirteen laboratories studied the method collaboratively on two levels of medicated feed. Overall average recovery was 106.5% of the oretical for the low level and 104.5% of the oretical for the high level. The method is recommended for adoption as official first action

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