1. MASTER EVK4-CT-2002-00093 1 The MASTER EWO dosimeters – how they work Prague 1 st June 2006 Terje Grøntoft, NILU

2. MASTER EVK4-CT-2002-00093 2 The EU project MASTER : Research partners: 1) Norwegian Institute for Air Research (NILU ) Norway. 2). Centre for Sustainable Heritage (CSH-UCL) University College of London. UK. 3) Albert Ludwigs Universitet - Freiburg Materialforshungs - sentrum (ALU-FMF ) Germany 4) Technical University of Crete (TUC) Dept. of Environmental Engineering, Polytechneioupolis. Greece. Museum partners - Test sites: 5) National Museum in Krakow. Poland. 6) Trøndelag Folk Museum, Trondheim, Norway 7) Historic Royal Palaces, London. UK 8) The National Trust, Bury St. Edmunds. UK 9) Württembergisches Landesmuseum, Landesstelle für Museumsbetreuung Baden Württemberg. Germany 10) Institute for Masonry and Construction Research, University of Malta.

3. MASTER EVK4-CT-2002-00093 3 The Early Warning Organic dosimeters: Pollution and climate dosimeters for organic objects collections Contents 1.The EWO dosimeter. The initial idea. 2. What are the ”specific” and ”generic” EWO dosimeters. 3. The principle of the EWO-G(Generic) dosimeter. 4. The calibration of the generic EWO-G dosimeter 5. How to interpret the measurement result from the generic EWO-G dosimeter 6. The user requirements to the EWO dosimeter.

4. MASTER EVK4-CT-2002-00093 4 1. An EWO dosimeter - The initial idea. - To develop an early warning system for organic objects. - Should be an effect dosimeter - Should be based on end-user identified needs - To assess degradation of organic objects indoors.

5. MASTER EVK4-CT-2002-00093 5 A transparent organic polymer (EWO-G) with a dye indicator (EWO-S). 2. Mounting Memory circuit EWO-G Sensor film Grip 1. Production Spin coating Glass substrate EWO polymer film (ALU-FMF) 1 cm 4. Analysis Light absorption 3. Exposure Environment - 3 months 2. The EWO dosimeters

6. MASTER EVK4-CT-2002-00093 6 The spesific EWO-S dosimeter Sample holder: Portable measurement instrument ALU - FMF

7. MASTER EVK4-CT-2002-00093 7 The generic EWO-G dosimeter Exposure at location 1. Photospectrometer in laboratory 2. Measurement at location Memory circuit EWO-G dosimeter Grip

8. MASTER EVK4-CT-2002-00093 8 Effect of the environment on the EWO-G (nm) Light- abs. 340 nm Photo- spectrometric measurement Exposure effect 3. The principle of the EWO-G dosimeter

9. MASTER EVK4-CT-2002-00093 9 EWO 3U B(C) Predicted from calibration Measured response 4. The calibration of the EWO-G dosimeter Statistical treatment of field test data using multiple regression:

10. MASTER EVK4-CT-2002-00093 10 Calibration equation: Centre for Sustainable Heritage. University College of London Trigger values for environmental parameters and for the EWO-G. (ppb) ( o C)(mWm -2 ) EWO-G effect = 0.75 NO 2 + 1.34 O 3 + 0.51 T + 0.35 UV Increasing deterioration 1 1.15 119.3

11. MASTER EVK4-CT-2002-00093 11 EWO-G Trigger response 0.0107

12. MASTER EVK4-CT-2002-00093 12 Example: Musems from MASTER field test 5. Interpretation of the EWO-G dosimeter

13. MASTER EVK4-CT-2002-00093 13 (#) = calibration values – level 3 The measurement result 0.0312 (5) O 3 (ppb): 3.6 (6.5) (15) (21.8) 3. 0.0246 4. 0.0405

14. MASTER EVK4-CT-2002-00093 14 Interpretation by the Acceptability – location table Centre for Sustainable Heritage. University College of London Showcases: One calibration point lower than location

15. MASTER EVK4-CT-2002-00093 15 6. The end-user requirements to the EWO dosimeter. - Easy to use - Easy to interpret - Visible change - Cheap - Inert - Small - Yes (?) - Yes (indirectly) - (?) - Yes

16. MASTER EVK4-CT-2002-00093 16 - Short-term and long term options - Range of sensor sensitivities - Able to relate to other kinds of monitoring - A diagnostic element to the sensor. - All environmental risks to be monitored - Yes - Yes (partly) - Yes (High to medium) -Generic: Depends on data available -Specific: Yes - Generic dosimeter: Yes - dependent on knowledge about environment Specific dosimeter: Yes - No (  visible light(LUX) and organic acids) - Durable

17. MASTER EVK4-CT-2002-00093 17 Preventive Conservation Strategy based on the: EWO-G dosimeter measurement

18. MASTER EVK4-CT-2002-00093 18 MASTER-logo

19. MASTER EVK4-CT-2002-00093 19 EWO-G effect = 0.75(0.17)NO 2 + 1.34(0.30)O 3 + 0.51(0.088)T + 0.35(0.21)UV Calibration intervals for environmental parameters -2 (#) = Uncertainty, 95 % significance level.

20. MASTER EVK4-CT-2002-00093 20 Trigger values for the EWO-G dosimeter Protection = 97.5 % Point 1: 0.0107 O 3 = 1 ppb, UV = 1 mW m -2 T = 19.3 o C RH = 55 %

21. MASTER EVK4-CT-2002-00093 21 EWO-G Trigger response Showcases: One calibration point lower than location

22. MASTER EVK4-CT-2002-00093 22

23. MASTER EVK4-CT-2002-00093 23 EWO-G Trigger response Showcases: One calibration point lower than location 0.0107

24. MASTER EVK4-CT-2002-00093 24 0.0312 (5) O 3 (ppb): 3.6 (6.5) (15) (21.8) 3. 0.0246 4. 0.0405

25. MASTER EVK4-CT-2002-00093 25 0.0312 (5) O 3 (ppb): 3.6 (6.5) (15) (21.8) 3. 0.0246 4. 0.0405