Juan Rafael Menchú Rosal

5 Questions 2 Answers 0 Followers

Questions related from Juan Rafael Menchú Rosal

Limonene Heavy Metals Analysis via ICP-MS?

Hello, How would you analyze a liquid sample of D- limonene via ICP-MS? With acid digestion or just a dilution? It is an analysis of Heavy Metals. It is the first time I work with this kind of...

20 March 2020 9,296 3 View

What filter paper would you recommend for pre-filtering a solution with lint that's gonna be filtered via membrane for bioburden determination?

I'm determining bioburden of textile materials by filtering on a membrane the diluent used to extract the microorganisms. As it's textiles I'm working with they naturally lose a lot of lint in the...

09 February 2019 9,489 8 View

How is the CFU for Aerobic Count and Yeast and Mold count calculated if extracted from a single dilution?

So I am testing this material for bioburden, I immerse 10 g of the material in 200 mL of eluent and then filter through a 0.45 uM membrane 100 mL for a Total Aerobic Count and 100 mL for a Yeast...

21 December 2018 9,716 6 View

In what step of preparation should pH of a culture media be read?

I've always done it before autoclaving with the media dissolved, but some people recommend doing it with a sample after sterilization with a flat-bottomed pH meter. Anyway I just have a standard...

02 August 2018 7,983 15 View

Is anyone familiar with method AATCC 147?

I am trying to validate AATCC 147 but I get different results everytime I run the test, sometimes I get growth under the fabric sample with samples that have shown a halo in previous runs. Any tips?

13 March 2018 8,821 2 View