Analytical info

General introduction

Topic Empty template Finalized sheet
method comparisons (MC) MC1: SO4 - Comparison of ICP-, IC- and spectrophotometric determination in colored soil solutions
MC2: Comparison of pH measurements in soils according to ISO 10390 and DIN 19684-1
MC3: Comparison of HTCO CLD and PO UV-220 nm oxidation
MC4: Influence of different acid mixtures in microwave digestion on the iron concentration determined by ICP-AES in foliage samples
MC5: Aqua regia digestion, total digestion and nitric acid digestion for humus and soil samples
new methods (NM)
material tests (MT) MT1: Leaching of PE-bottles
MT2: Comparison of two wet-only samplers: ANDERSEN and EIGENBRODT UNS 130
sample pretreatment and storage (SP) SP1: Pair-wise comparison of filtered and not filtered precipitation samples
SP2: Storage of soil water and depo samples under diferent conditions
SP3: Influence of filtration on TOC content in different water samples
technical information (TI)
Analytical information from meetings of the Working Group and heads of the labs

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

A. Guerin: uncertainties of C and N quantified in soils with an elemental analyzer

A. Fürst (2015): Using control charts with examples of control charts delivered by participants

A. Marchetto (2015): Problems with ionic balance with examples delivered by participants

Kirsti Derome: problems with conductivity check

Alessandra Mazzoli: Using WRT and control charts to evaluate analytical prescision

Anna Kowalska: Measuring of samples with low concentrations: contamination problems and clean working conditions

Sample Storage

N. Cools: Longterm storage of soil samples

F. Mutsch: Experimental Design to Detect Chemical Changes of Forest Soils During Long-term Storage

N. Koenig: Effects of storage in field and in laboratory and influence of temperature and light on the chemistry of forest water samples

Sample Preparation

de Cinti at al.: From sampling to chemical determination: at which step the possible mistakes?

M. Barbaste, T.Dalix, S. Desalme, P. Soulé, D. Orignac: Grinding plant samples: a critical risk of contamination

Nils Koenig: Problems with the homogenisation and subsampling of humic samples and  samples from sandy soils with high organic matter content

Alfred Fürst: drying of foliage and litterfall

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. Drozdz: Problems and solutions in measuring exchangable Ca, Mg and K in soil samples

P. O´Dea et al.: Mouldy problems and more with CEC determination

Nils König: Comparison of the analytical method for exchangable cations in soil and humus layer of the ICP Forests Manual with the German methods

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

N. König (2015): new system for aqua regia digestion: comparison with sytem with glas tubes and reflux condenser

Nils König: Aqua regia digestion with microwave or reflux method

Ulis Soukand: Briefly about MW digestion and aqua reqia

Microwave Digestion for plant material

D. Krupova: Problems with the digestion of foliage samples

A. Fürst (2015): Improvements of a Microwave digestion - ICP-AES method for foliage samples

Digestion for plant material

Carmen Jacoban: Comparison of wet digestion and dry ashing methods for total phosphorus analysis from needles/leave

Total Digestion

F. Mutsch et al.: Total Digestion versus XRF Analysis

N. Koenig: Total digestion with HNO3/HF (German method)

P. Michopulos: XRF for total elements

Ann Guerin: Total major and trace elements in soils obtained with an automated digestion system

Analytical Methods for the Determination of Parameters

Alkalinity

R. Mosello: Problems related to measurements of low value of alkalinity

Mosello, Marchetto: Problems and solutions measuring Alkalinity

G. Tartari et al.: Measurement of low values of total alkalinity

Ciesla, Kowalska: How to measure alkalinity in water samples - some practical information

A. Marchetto (2015): Presentation about alkalinity problems

R. Hristova (2015):Difficulties in determination of alkalinity

Atomic Absorption

P. Michopoulos: Problems with calibration of FAAS for metals

C. Iacoban (2015): Comparison between AAS and IC cations analysis for the 2015 WRT

A. Butlers (2015): Problems with C/S element analyzer and FAAS

Carbonate

de la Cruz et al.: Why use calcimeter method and not titration method for measured carbonates?

Nils König: experience with a new CO3-Analyzer

Tacettin Öztürk: The comparison of the results of the CO3 analyzer instrument and the Schiebler calcimeter

C total

A. Fürst: Calibration of Element-Analyzers (LECO CN 2000, CNS 2000 and SC 432)

A. Butlers (2015): Problems with C/S element analyzer and FAAS

A. Guerin (2015): uncertainties of C and N quantified in soils with an elemental analyzer

Ca

A. Fürst: Determination of Ca and K with Flame-AAS

A. Fuerst: Why it is so difficult to analyze K, Ca and S in tree foliage

P. Drozdz: Problems and solutions in measuring exchangable Ca, Mg and K in soil samples

DOC

A. Kowalska, Z. Ciesla: DOC and TN determination: acomparison of instruments from Elementar and Shimadzu

Free H+

A. de la Cruz: How improve the H+ measured in CIC in basic soils?

Hg

D. Krupova: Mercury Analyzer

ICP

N. Koenig: Calibration for potassium measurements at low concentrations

J. Durkovicova:Comparison of LOD/LOQ for ICP measurements in water samples with and without ultrasonic nebulizer

A. Fürst (2015): Improvements of a Microwave digestion - ICP-AES method for foliage samples

A. Kowalska (2015):Cation determination by ICP-OES and Ion chromatography and its influence on ionic balance

Ion Chromatography

B. Nenkova: Ion chromatography in water with low contamination

G. Tartari et al.: Analytical aspects comparison DTN and IC determinations

G. Tartari, A. Marchetto: Calibration for ammonium and sulfate measurements at low concentrations

N. Koenig:Calibration for potassium measurements at low concentrations
C. Iacoban (2015): Comparison between AAS and IC cations analysis for the 2015 WRT
A. Kowalska (20159: Cation determination by ICP-OES and Ion chromatography and its influence on ionic balance

K

A. Fürst: Determination of Ca and K with Flame-AAS

A. Fuerst: Why it is so difficult to analyze K, Ca and S in tree foliage

P. Drozdz: Problems and solutions in measuring exchangable Ca, Mg and K in soil samples

Mg

P. Drozdz: Problems and solutions in measuring exchangable Ca, Mg and K in soil samples

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

A. Kowalska, Z. Ciesla: DOC and TN determination: acomparison of instruments from Elementar and Shimadzu

S. Kunnas: Changing the analysis method during the long-term monitoring project - TN analysis with TOC/TN vs. FIA - Susan

P. Drozdz: Comparison of two methods of determination of total N in soil samples (dry combustion and modified Kjeldahl)

A. Guerin (2015): uncertainties of C and N quantified in soils with an elemental analyzer

M. Ionescu (2015): Nitrogen distillated device

NO3

C. Iacoban: N-NH4 and N-NO3 concentrations in water samples

A. Marchetto (2015): Nitrite interference in nitrate determination by continous flow analysis

NH4

C. Iacoban: N-NH4 and N-NO3 concentrations in water samples

N. König (2015): Problems with NH4 determination with ion chromatography

Zuzanna Ciesla: Ammonium in 8th Deposition and soil solution WRT 2016/2017: Problem with high results by IC

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

P. Michopoulos (2015): The use of triethanolamine as a buffer in acid digests for the determination of P in plant tissues

PO4

B. Nenkova: The secret of determination of orthophosphates

pH

F. Symossek: pH-Determination

F. Mutsch: Potassium in Aqueous Solutions after pH-Measurement

D. Zlindra: Differences in measurement of soil pH: ISO 10390:2005 vs. ISO 10390:1994

F. Symossek (2015): Special presentation about pH problems

S

A. Fuerst: Why it is so difficult to analyze K, Ca and S in tree foliage

Alfred Fürst: Correct sulphur determination of maple leaves with higher calcium content

SO4

N. Koenig: Observed problems with SO4 analysis of one sample of the 6. water ring test

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

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