scholarly journals Extraction and determination of humic acids in carbonaceous gold ores

2019 ◽  
Vol 1347 ◽  
pp. 012127
Author(s):  
Guodong Chen ◽  
Hongying Yang ◽  
Huiqun Niu ◽  
Linlin Tong ◽  
Shuiping Zhong ◽  
...  
Keyword(s):  
Humic Acids ◽  
Gold Ores

TLC Determination of Aquatic Humic Acids

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2567-2570 ◽  
Author(s):  
M. Kaštelan-Macan ◽  
Š. Cerjan-Stefanovic ◽  
D. Jalšovec
Keyword(s):  
Thin Layer ◽  
Quantitative Determination ◽  
Humic Acids ◽  
Visible Spectrum ◽  
Solvent System ◽  
Spectroscopic Methods ◽  
Precise Method ◽  
Adsorption Resin ◽  
Layer Chromatography

Humic acids are mostly determined by spectroscopic methods, although they are not accurate enough, because humic acids possess no maximum absorption at any wavelength in the ultraviolet and visible spectrum. In this contribution the accurate and precise method for aquatic humic acids determination, using thin layer chromatography, was worked out. Previously, humic acids were separated and preconcentrated -from the river water, using macroreticular adsorption resin Amberlite XAD-4, and subsequently determined by TLC. The Chromatographie system was: silicagel HF254(Merck, precoated plates 20 × 20 cm) and NH3 -acetone (60:40,v/v) as a solvent system. Quantitative determination was made by Camag– Turner 111 Fluorimeter, by measuring UV–quenching.

Determination of OH groups in humic acids using methylation with dimethylsulfate

Talanta ◽  
2008 ◽  
Vol 76 (4) ◽  
pp. 960-963 ◽  
Author(s):  
P KURAN ◽  
P JANOS ◽  
L MADRONOVA ◽  
J NOVAK ◽  
J KOZLER
Keyword(s):  
Humic Acids ◽  
Oh Groups

Determination of ammonia in the air using piezoelectric resonance sensors coated with humic acids

2010 ◽  
Vol 65 (4) ◽  
pp. 414-417
Author(s):  
A. A. Zvyagin ◽  
D. V. Nenakhov ◽  
S. N. Korchagina ◽  
A. V. Shaposhnik ◽  
V. V. Kotov ◽  
...  
Keyword(s):  
Humic Acids ◽  
Piezoelectric Resonance

Flow-injection photometric determination of the phenol index of natural waters in the presence of humic acids

2005 ◽  
Vol 60 (1) ◽  
pp. 70-74 ◽  
Author(s):  
A. L. Moskvin ◽  
A. V. Mozzhukhin ◽  
E. A. Mukhina ◽  
L. N. Moskvin
Keyword(s):  
Humic Acids ◽  
Flow Injection ◽  
Natural Waters ◽  
Photometric Determination ◽  
Phenol Index

Determination of hydrophobicity and optical properties of soil humic acids isolated by different methods

2013 ◽  
Vol 132 ◽  
pp. 84-89 ◽  
Author(s):  
Olga E. Trubetskaya ◽  
Oleg A. Trubetskoj ◽  
Guillaume Voyard ◽  
Claire Richard
Keyword(s):  
Optical Properties ◽  
Humic Acids ◽  
Soil Humic Acids ◽  
Properties Of Soil

Immunological determination of triazine pesticides bound to soil humic acids (bound residues)

1996 ◽  
Vol 354 (3) ◽  
pp. 352-358 ◽  
Author(s):  
Petra Ulrich ◽  
Michael G. Weller ◽  
R. Niessner
Keyword(s):  
Humic Acids ◽  
Bound Residues ◽  
Soil Humic Acids

X-ray Fluorescence Determination of Heavy Metals in Humic Acids

2004 ◽  
Vol 59 (11) ◽  
pp. 1066-1072 ◽  
Author(s):  
A. N. Smagunova ◽  
U. V. Ondar ◽  
E. I. Molchanova ◽  
H. V. Vashukevich ◽  
V. A. Kozlov ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Humic Acids ◽  
X Ray ◽  
Fluorescence Determination
Sign in / Sign up

Export Citation Format

Share Document