Sources of error in the determination of non-ionic surfactants in environmental samples

1996 ◽  
Vol 123 (1-4) ◽  
pp. 185-196 ◽  
Author(s):  
Zenon Lukaszewski ◽  
Andrzej Szymanski
Keyword(s):  
Environmental Samples ◽  
Ionic Surfactants ◽  
Sources Of Error

Field analysis Cr(VI) in water samples by a smartphone-based ultralong absorption path reflection colorimetric device

2021 ◽  
Author(s):  
Xiaolan Chen ◽  
Cheng Ma ◽  
Qi Kang ◽  
Yu-Qin Chen ◽  
Dazhong Shen
Keyword(s):  
Hexavalent Chromium ◽  
Water Samples ◽  
Environmental Samples ◽  
Field Analysis ◽  
Absorption Path

Hexavalent chromium is highly toxic and regarded as one of the main pollutants in environmental samples. Sophisticated laboratory instruments are commercially available for in-field determination of chromium. It is highly...

Facile and Sensitive Spectrophotometric Determination of Carbosulfan in Formulations and Environmental Samples

2006 ◽  
Vol 129 (1-3) ◽  
pp. 271-276 ◽  
Author(s):  
K. Suresh Kumar ◽  
K. Suvardhan ◽  
D. Rekha ◽  
K. Kiran ◽  
G. Chalapathi Rao ◽  
...  
Keyword(s):  
Spectrophotometric Determination ◽  
Environmental Samples

THE DISTRIBUTION OF IONIZATION ALONG UNDERDENSE METEOR TRAILS

1964 ◽  
Vol 42 (11) ◽  
pp. 2035-2047 ◽  
Author(s):  
D. W. Rice ◽  
P. A. Forsyth
Keyword(s):  
Upper Atmosphere ◽  
Sources Of Error ◽  
Signal Characteristics ◽  
Radio Signals ◽  
Meteor Trails

Attempts to use the decay of radio signals reflected from individual meteor trails to study the upper atmosphere have revealed a puzzling inconsistency in the signal behavior. An earlier paper pointed out that this inconsistency remained even when the previously postulated sources of error were eliminated. As a result, an irregularly ionized trail model was proposed and shown, by calculation of signal characteristics, to be capable of accounting for the observations. This paper presents results of a new experiment which permitted the determination of the ionization profiles as the meteor trails were formed. The predicted irregularities were found, even for trails which exhibited apparently "ideal" underdense signal characteristics.

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