Last week I had a change to visit a brand new Polli laboratory of the Estonian University of Life Sciences together with our student Elmo. The Polli lab is located in Southern-Estonia near Karksi-Nuia and surrounded by breathtaking landscape with hills and lakes. The Polli laboratory is unique in Estonia as it combines equipment suitable […]
Monthly Archives: August 2015
Students I supervised last school year gave me a rafting trip as a present with them for my birthday in May and on this Friday we went to Võhandu river for this trip. Altogether we passed 20 km containing both quite slow flow parts but also some cascades. Slow parts, though not that adventures, taught […]
Today I would like to introduce you to two books that I find very valuable and that can be freely downloaded from the internet. The “Five keys to successful LC methods” and “Controlling selectivity in reversed-phase LC” are collections of articles published in LC/GC in the section “LC Troubleshooting” by John W. Dolan. It’s useful […]
In my statistics course, similarly to I guess all other teachers concerned in calibration, I teach that for instrumental analyses weighted linear regression should be used. Why? Non-weighted linear regression (the one we can use with LINEST, SLOPE and INTERCEPT in excel) assumes same signal precision (repeatability standard deviation in other words) for all concentrations […]