Resorcinol-Formaldehyde Reaction - Observed by Ultraviolet Absorption Measurements

1951 ◽  
Vol 43 (10) ◽  
pp. 2372-2375 ◽  
Author(s):  
Paul J. Stedry
Keyword(s):  
Ultraviolet Absorption ◽  
Resorcinol Formaldehyde ◽  
Absorption Measurements

Toxicity and recalcitrant compound removal from bleaching pulp plant effluents by an integrated system: anaerobic packed-bed bioreactor and ozone

2010 ◽  
Vol 61 (1) ◽  
pp. 199-205 ◽  
Author(s):  
T. R. Chaparro ◽  
C. M. Botta ◽  
E. C. Pires
Keyword(s):  
Pulp Mill ◽  
Packed Bed ◽  
Ultraviolet Absorption ◽  
Integrated System ◽  
Packed Bed Bioreactor ◽  
Cellulose Pulp ◽  
Adsorbable Organic Halides ◽  
Organic Halides ◽  
Before And After ◽  
Absorption Measurements

Effluents originated in cellulose pulp manufacturing processes are usually toxic and recalcitrant, specially the bleaching effluents, which exhibit high contents of aromatic compounds (e.g. residual lignin derivates). Although biological processes are normally used, their efficiency for the removal of toxic lignin derivates is low. The toxicity and recalcitrance of a bleached Kraft pulp mill were assessed through bioassays and ultraviolet absorption measurements, i.e. acid soluble lignin (ASL), UV280, and specific ultraviolet absorption (SUVA), before and after treatment by an integrated system comprised of an anaerobic packed-bed bioreactor and oxidation step with ozone. Furthermore, adsorbable organic halides (AOX) were measured. The results demonstrated not only that the toxic recalcitrant compounds can be removed successfully using integrated system, but also the ultraviolet absorption measurements can be an interesting control-parameter in a wastewater treatment.

scholarly journals Development of an alkali chloride vapour-generating apparatus for calibration of ultraviolet absorption measurements

2017 ◽  
Vol 88 (2) ◽  
pp. 023112 ◽  
Author(s):  
T. Leffler ◽  
C. Brackmann ◽  
M. Berg ◽  
M. Aldén ◽  
Z. S. Li
Keyword(s):  
Ultraviolet Absorption ◽  
Alkali Chloride ◽  
Absorption Measurements

Uncombined Intermediates in FD&C Blue No. 1

1967 ◽  
Vol 50 (3) ◽  
pp. 526-530
Author(s):  
Robert K Johnson
Keyword(s):  
Column Chromatography ◽  
Analytical Methods ◽  
Collaborative Study ◽  
Sulfanilic Acid ◽  
Ultraviolet Absorption ◽  
Average Level ◽  
Standard Deviations ◽  
Absorption Measurements ◽  
Food Colors

Abstract A collaborative study of the method derived from one proposed by Schumacher, This Journal, 48, 819-826 (1965), was sponsored by the Subcommittee on Analytical Methods, Certified Color Industry Committee. All 6 domestic manufacturers of certified food colors were represented as well as the Division of Color Certification and Evaluation, FDA, Washington, D.C. Eight collaborators analyzed 3 samples each. Intermediates were separated by column chromatography and their concentrations were estimated from ultraviolet absorption measurements. N-Ethyl-iV-(3-sulfobenzyl) sulfanilic acid (ESBSA) and mixed isomers of sulfobenzaldehyde (SB) were recovered at an average level of 98% of the amounts added. Between-laboratory standard deviations ranged from 0.014 to 0.18% when the intermediates were present at levels of 0.07-1.46%. The method is recommended for adoption as official, first action

X-ray ultraviolet absorption measurements of laser-driven Au∕CH∕Al multilayers

2007 ◽  
Vol 14 (10) ◽  
pp. 103301 ◽  
Author(s):  
Jiyan Zhang ◽  
Guohong Yang ◽  
Jiamin Yang ◽  
Yaonan Ding ◽  
Baohan Zhang ◽  
...  
Keyword(s):  
Ultraviolet Absorption ◽  
X Ray ◽  
Absorption Measurements
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