Hi everyone, Hope everyone had a nice weekend and managed to enjoy the little bit of sun we got. Just wanted to let everyone know I will be doing a clean of the nitric acid stills and doing a cycle with MQ, so that will take 3-4 days. Both labs have a full stock of nitric acid, but I won't be able to refill the stills to make more distilled nitric acid until the end of this week or early next week. Please factor that in with any chemistry you have coming up. Apologies for the trouble, it's to ensure the system is working well and staying clean 🙂 On that topic, if anyone has to use any nitric acid (both labs have full bottles) I would recommend testing their molarity. I'm afraid I'm not sure how that's done so I can't give instructions/do it myself but if you're not sure how it's done either, drop me an email and I will tell you who to speak to 🙂 Many thanks, Sofiya Sofiya Valkova (hi/ei) Technegydd Ymchwil Ysgol Gwyddorau'r Ddaear a’r Amgylchedd Prifysgol Caerdydd Prif Adeilad, Plas-y-Parc Caerdydd CF10 3AT Ffôn : +44 (0)29 2087 76647 Ebost: valkovas(a)caerdydd.ac.uk Mae'r brifysgol yn croesawu gohebiaeth yn Gymraeg neu yn Saesneg. Ni fydd gohebu yn Gymraeg yn creu unrhyw oedi. Sofiya Valkova (she/her) Research Technician School of Earth and Environmental Sciences Cardiff University Main Building, Park Place Cardiff CF10 3AT Phone: +44 (0)29 2087 76647 Email: valkovas(a)cardiff.ac.uk The university welcomes correspondence in Welsh or English. Corresponding in Welsh will not lead to any delay.