New excel files for ion balance checks: soil solution samples with DOC, deposition samples with high concentrations. Aldo Marchetto and Nils König

Transcription

1 soil solution samples with DOC, deposition samples with high concentrations Aldo Marchetto and Nils König Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

2 New excel file for ion balance checks in soil solutions

3 Charge of DOC [µmolc/l] = Kat + Met An [µmolc/l] Charge of DOC = H + + Na + + K + + Ca 2+ + Mg 2+ + NH Mn 2+ Mn(OH) + + Al 3+ Al(OH) 2+ +Al(OH) Fe 3+ + Fe(OH) 2+ + Fe(OH) Fe-DOC + Al-DOC + Mn-DOC - SO Cl - - NO 3- - PO Alk [µmolc/l] Overestimation of the charge of DOC by calculating with Fe 3+, Al 3+ and Mn 2+ Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

4 D, FI, FR, NO,UK (n=6140) (Cat+Met)-An vs DOC 2000 Cat +metals- An (ueq/l) y = 8,6439x R 2 = 0, DOC (mg/l) Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

5 FI (n=300) ph 4-5 (Cat+Met)-An vs DOC UK (n=565) ph4-5 (Cat+Met)-An vs DOC Cat +metals- An (ueq/l) Cat +metals- An (ueq/l) y = 6,0388x R 2 = 0, DOC (mg/l) NO (n=265) ph 4-5 (Cat+Met)-An vs DOC y = 6,7856x R 2 = 0, DOC (mg/l) D (n=2330) ph 4-5 (Cat+Met)-An vs DOC different Countries Range ph 4-5 Cat +metals- An (ueq/l) Cat +metals- An (ueq/l) BE (n=520) ph 4-5 (Cat+Met)-An vs DOC without Mn y = 10,887x R 2 = 0, DOC (mg/l) y = 8,815x R 2 = 0, DOC (mg/l) FR (n=510) ph4-5 (Ca+Met)-An vs DOC Cat +metals- An (ueq/l) y = 7,7426x R 2 = 0, DOC (mg/l) (Cat +Met)-An y = 13,442x R 2 = 0, DOC

6 country n ph range charge factor R 2 D,FI,FR,NO,UK 940 < 4 7,2 0,31 D,FI,FR,NO,UK ,04 0,34 D,FI,FR,NO,UK 1435 > 5 12,3 0,62 Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

7 country n ph range charge factor R2 FI 90 < 4 4,9 0,78 FI ,04 0,86 FI 90 > 5 5,48 0,25 NO x < 4 x x NO ,87 0,80 NO 105 > 5 6,46 0,69 UK 200 < 4 6,9 0,6 UK ,82 0,57 UK 540 > 5 9,64 0,47 Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

8 country n ph range charge factor R 2 D 630 < 4 8,41 0,29 D ,74 0,24 D 495 > 5 11,9 0,79 BE 805 < 4 9,24 0,11 BE ,89 0,33 BE 25 > 5 8,08 0,37 FR x < 4 x x FR ,4 0,4 FR 670 > 5 11,5 0,63 Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

9 new! Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

10 can be changed! See: notes in the ecxel file Correction parameters from Sampling typology Slope STF 5,04 user THR 6,80 CON 4,17 SW 8,64 Intercept -6,67-12,32-5,01 0,00 Correction parameters from Mosello et al from manual Sampling typology STF THR CON SW Slope 5,04 6,80 4,17 8,64 Intercept -6,67-12,32-5,01 0,00 Nordwestdeutsche Forstliche Versuchsanstalt Göttingen, Germany

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12 Correction of the ion balance with different factors for different ph ranges (all countries): D,FI,FR,NO,UK ph <4 (n=940) % soil solution with correct ion balance D,FI,FR,NO,UK ph 4-5 (n=3800) % soil solution with correct ion balance 100% 100% 80% 60% 40% 15 % 20% 0% without correction with correction 54 % >1,1 0,9-1,1 <0,9 34 % 80% 60% 40% 20% 0% without correction with correction 62 % >1,1 0,9-1,1 <0,9 100% 80% 60% 40% D,FI,FR,NO,UK ph >5 (n=1435) % soil solution with correct ion balance 20% 29 % 0% 61 % without correction with correction >1,1 0,9-1,1 <0,9 different ph ranges all samples

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17 idrolab.ise.cnr.it/images/doc/analytical_data_validation_2011.xls

18 Criteria proposed for the data validation are not rigid and mandatory, but should be used merely as guidelines for the person in charge of validation in each laboratory. Analyses which do not fit with the validation criteria should be repeated and, if data are confirmed, they should be accepted and included in the database.