The Working Group has the task to further develop the harmonised methods in the field quality assurance and quality control in laboratories. The group closely cooperates with the Expert Panels "Deposition", "Foliage", and "Soil".
Quality Control
N. König: Quality Assurance and Quality Control in Laboratories – a review
R. Mosello: DOC in ion balances of deposition solutions
R. Mosello: Excel sheet for testing water chemical analysis
M. Barbaste: Design and use of control and reference material for plant analysis
K. Derome: Use of control charts as QA/QC tool
R. Mosello: QA/QC for water samples
R. Mosello, N. König: QA/QC for water samples with DOC
A. Fürst: Plausible Ranges for Foliar and Litterfall Analyses
B. De Vos: Plausible Ranges for Soil Analyses
S. Kostrova et al.: Tolerable limits for total elements in soil (example of Fe)
A. Marchetto et al.: Detection/quantification limits – determination and use
Sample Storage
N. Cools: Longterm storage of soil samples
Sample Preparation
de Cinti at al.: From sampling to chemical determination: at which step the possible mistakes?
Analytical Methods for Digestions, Extractions
B. Heil: Differencies between Hungarian and European soil analyses methods in forestry
Exchangeable Cations with BaCl2-Extraktion
J. Durkovicova: Exchangeable ion determinations in BaCl2
M. Kantola et al.: Problems in soil analysis: exchangeable cations and acidity
P. O´Dea et al.: Mouldy problems and more with CEC determination
Aqua Regia Digestion
N. Proix: Application of microwave assisted Aqua Regia extraction to soil samples
N. König: HNO3-pressure and HNO3-microwave digestion for humus samples
N. König: Measuring of elements in aqua regia digestion solutions with ICP
P. O´Dea et al.: Hot issues with Aqua Regia
Microwave Digestion for plant material
D. Krupova: Problems with the digestion of foliage samples
Total Digestion
F. Mutsch et al.: Total Digestion versus XRF Analysis
Analytical Methods for the Determination of Parameters
Alkalinity
R. Mosello: Problems related to measurements of low value of alkalinity
G. Tartari et al.: Measurement of low values of total alkalinity
Atomic Absorption
P. Michopoulos: Problems with calibration of FAAS for metals
Carbonate
de la Cruz et al.: Why use calcimeter method and not titration method for measured carbonates?
C total
A. Fürst: Calibration of Element-Analyzers (LECO CN 2000, CNS 2000 and SC 432)
Ca
A. Fürst: Determination of Ca and K with Flame-AAS
Free H+
A. de la Cruz: How improve the H+ measured in CIC in basic soils?
Ion Chromatography
B. Nenkova: Ion chromatography in water with low contamination
G. Tartari et al.: Analytical aspects comparison DTN and IC determinations
K
A. Fürst: Determination of Ca and K with Flame-AAS
Moisture
C. Iacoban: Importance of the accurate determination of moisture for soil and needles/leaves samples for the final results
N total
A. de la Cruz: Problems in total nitrogen determination in water
G. Tartari et al.: Analytical aspects comparison DTN and IC determinations
A. Fürst: Calibration of Element-Analyzers (LECO CN 2000, CNS 2000 and SC 432)
D. Zlindra: Measurement of total N in Water – problems with high blanks
D. Zlindra: Total N in water – problem solved
J. E. Jacobsen: Differences between results from N-determination by Kjeldahl method and combustion methods
N. Koenig: Determination of total N
P. Michopoulos: Total N in waters by the Kjeldahl method. Statistical problems
NO3
C. Iacoban: N-NH4 and N-NO3 concentrations in water samples
NH4
C. Iacoban: N-NH4 and N-NO3 concentrations in water samples
P
A. Velcheva et al.: Determination of clay, silt and total phosphorus in soil samples
P. Michopoulos: Colorimetric determination of P in digested plant material
pH
F. Symossek: pH-Determination
Soil Physics
particle size
A. Velcheva et al.: Determination of clay , silt and total phosphorus in soil samples
D. Krupova: Determination of particle size distribution
Volumetric Water Content
F. Schindler et al.: Ring test for measuring soil hydraulic properties
