EnviroDIY | Richard Storey | Activity https://www.envirodiy.org/members/rstorey/activity/ Activity feed for Richard Storey. Tue, 07 Jul 2026 19:34:57 -0400 https://buddypress.org/?v= en-US 30 hourly 2 6ce61b33925e57be0714d726158ec9cc Richard Storey started the topic Mobile phones as photometers in the forum Miscellaneous https://envirodiy.org/topic/mobile-phones-as-photometers/ Wed, 11 Apr 2018 05:29:31 -0400 I am using a colorimetric method for measuring nitrate concentrations in streams. The final part requires the user to compare the colour that develops in the sample vial to a colour chart, but our volunteers don’t like the subjective nature of this last step. I am wondering whether a mobile phone could be used as a photometer to measure the light…[Read more]

]]> a4e55497cd77078d2ae738b2c5a88f3f Richard Storey became a registered member https://www.envirodiy.org/activity/p/3136/ Tue, 10 Apr 2018 00:42:50 -0400 0