Review and interlaboratory comparison of the Oddy test methodology

Heritage Science

Table 5 Information on the reaction vessel setup used by each institution participating in the interlaboratory comparison of the 3-in-1 Oddy test

Participants	Reaction vessel setup			Water	Stopper	Coupons
Participants	Test tube	Jar	Vol.	Water	Stopper	Coupons
I	x		50 mL	0.5 mL	Silicone	The metal coupons were hung on the silicone stopper by means of glass hooks inserted in triangular formation. The position of the coupons is equivalent. Use wide plastic ties to ensure the tightness of the stopper
II	x		150 mL	1.5 mL	Silicone	The metal coupons were inserted in parallel into silicone stopper (lead in the middle)
III	–	–	250 mL	2.5 mL	Glass lid	The coupons were hung one at a time from an inert nylon wire taped to the outside of the Erlenmeyer flask. The tape is removed when the setup is placed in the oven. A 10 ml inert beaker was used to hold the vials containing water
III	Erlenmeyer flask with ground glass lid				Glass lid
IV		x	135 mL	1.23 mL	Silicone	The coupons were inserted in parallel into silicone stoppers (silver in the middle)
V	x		50 mL	0.5 mL	Silicone	The coupons were inserted in parallel into silicone stoppers (lead in the middle)
VI		x	100 mL	1 mL	Silicone	The three metal coupons were inserted in parallel into silicone stopper. An extra incision was made to insert a stainless steel wire (0.08 mm diam), which was used to secure the silicone stopper and attached coupons at the top of the reaction vessel. The bottle cap was screwed on while holding the wire in place
VII	x		54 mL	0.5 mL	Silicone	The metal coupons were inserted in parallel into silicone stopper (lead in the middle)

After 15 min at 60 ºC, the silicone stoppers and screw caps were checked for tightness to ensure an airtight seal.