Catherine Wong

5 Questions 2 Answers 0 Followers

Questions related from Catherine Wong

Absorbance of Toluene at 285nm ?

I got an sample with known Absorbance at 285nm which is 0.689 (got it from CoA). Then I transferred it to another container to check whether it is feasible for toluene. I collected toluene sample...

03 December 2019 1,829 0 View

How do determine if the unknown is sodium bromate?

When I dissolve the sodium bromate into acid the colour of the solution is different from usual. So I would like to know if there's a way to determine the sodium bromate.

11 April 2019 6,980 0 View

How to interpret GC-FID result ?

I analyse Toluene with GC-FID (Elite 624 columns are specially engineered low to mid polarity columns (6%-cyanopropylphenyl)- 94% dimethylpolysiloxane) There're some impurities in the sample...

21 March 2019 6,006 4 View

Can I use other indicator to replace potassium chromate in silver nitrate standardization against sodium chloride?

Any suggestion on replacement of potassium chromate in the standardization of AgNO3? Thank you.

25 February 2019 1,058 1 View

Endotoxin content of purified water by kinetic chromogenic. Dilution factor?

Hi all, Currently, I working on a project to change the endotoxin test for purified water from gel clot to kinetic chromogenic. Previously, the PW sample tested by gel clot at 10X. I proposed to...

13 May 2016 6,182 1 View