EMEP31 expected values

Main components in synthetic precipitation

Unit G1 G2 G3 G4
SO4 ug S/ml 0.673 0.776 1.319 1.474
NO3 ug N/ml 0.274 0.396 0.529 0.612
NH4 ug N/ml 0.160 0.214 0.267 0.348
H ug/ml 26.667 33.333 60.000 66.667
Mg ug/ml 0.124 0.114 0.155 0.175
Na ug/ml 0.208 0.329 0.476 0.465
Cl ug/ml 0.154 0.232 0.347 0.386
Ca ug/ml 0.102 0.115 0.192 0.217
K ug/ml 0.136 0.204 0.306 0.374
Cond uS/cm 16.79 21.08 35.23 39.53
pH pH units 4.57 4.48 4.22 4.18

SO2-S in absorbing solution

Unit A1 A2 A3 A4 A5
SO2 ug S/ml 0.00 0.367 (*) 0.450 (*) 0.20 0.16

SO2 and HNO3 in impregnated filters

Unit B1 B2 B3 B4 B5 B6
SO2 ug S/filter 12.0 14.03 0.00 88.17 68.13 0.00
HNO3 ug N/filter 9.8 11.45 0.00 35.99 27.81 0.00

NO2 in absorbing solution

Unit C1 C2 C3 C4
NO2 ug N/ml 0.087 0.072 0.116 0.145

NH3-N in impregnated filters

Unit J1 J2 J3 J4 J5 J6
NH3 ug N/filter 16.0 15.04 0.00 0.00 40.1 34.09

Metals in synthetic precipitation

Unit H1 H2 H3 H4
Pb ng/ml 19.000 22.000 1.000 1.500
Cr ng/ml 6.50 7.50 0.80 0.70
Ni ng/ml 6.00 7.50 1.20 0.90
Cu ng/ml 12.00 9.00 0.90 1.00
Zn ng/ml 110.00 105.00 9.50 7.00
As ng/ml 9.00 8.50 0.90 1.10
Cd ng/ml 0.70 0.50 0.06 0.06

(*) All reported values showed a systematic error compared to the expected value. This is highly unusual and we consider the theoretical value to be wrong. The original expected values is thus replaced with the median value of all reported values.


Last updated: February 2014 by Anne Hjellbrekke