Derk Bakker

4 Questions 5 Answers 0 Followers

Questions related from Derk Bakker

Why can sharp cut cyclones for dust monitoring be mounted horizontally?

In dust monitoring sharp cut cyclones are use to limit the size of the particles going through the monitor. I have noticed that many are mounted horizontally. Why can that be done? My...

07 May 2020 1,537 0 View

Chromic Sulphate (Cr2(SO4)3.6H2O is ment to be soluble in water, however the product (UniChem) we have is not at all. How can that be?

We want to use Chromic Sulphate (Cr2(SO4)3.6H2O) to contaminate soil, however we found it not to be soluble in water while according the literature and tanning practices this should be soluble in...

20 January 2019 5,110 3 View

A large range of Cr content on the same soil sample was measured with the AAS. Why could this be?

We've been digesting the same soil in a number of different ways and measuring the Cr content of the filtrate using an AAS. The results are highly variable, and only remotely reflected the levels...

19 December 2018 5,452 8 View

Why is the light spectrum distribution of white (6000K) LED tubes similar to warm (3000K) LED tubes?

I have been measuring the light spectrum (about 10 different wave lengths: 504 to about 1000 nm) and intensity at each of those wave lengths of two different 18W LED tubes: cool white, and warm...

23 August 2017 623 8 View