Antonio Salituro

14 Questions 34 Answers 0 Followers

Questions related from Antonio Salituro

What's the regulation dictating the testing requirements food products?

Hello, I am aware of FDA being the reference institution for food production control. However, I am not sure which guidance in particular defines the testing which are required to be...

11 February 2020 10,037 14 View

What's the state of the art regulation for testing of fertiliser and pesticides?

Hello, Which are the standard testings for fertiliser and pesticides which are required by current legislation? Thanks, Antonio

11 February 2020 8,638 6 View

Can the Time weighted average (TWA) exposure concentration be estimated starting from the Short-Term Exposure Limit (STEL)?

Hello, I have got an MSDS indicating the STEL of a compound and I'd like to know what the relevant TWA would be. Is there a general ratio which roughly links the two parameters (regardless of the...

10 January 2020 9,801 4 View

Which are the current challenges for a more extensive application of medical marijuana? And how could physical chacterisation help?

Hello, First, I have to say that this topic is quite new to me and I'm trying to expand my knowledge on it. In particular, I was wondering if any of you had an understanding of how the...

11 June 2019 7,378 1 View

How is water activity of pharmaceutical products measured?

Hello All, Which methodology should I follow to measure water activity of pharmaceutical materials? I am aware that there are two USP procedures in this regard, chapter 922 and 1112. Which of...

13 May 2019 8,127 4 View

Could anybody suggest any (possibly pharmaceutical) material which could be used for PXRD proficiency testing?

I would like to fin out more information about which type of material (ideally pharmaceutical compounds) could be suitable to perform both qualitative and quantitative Powder X-ray diffraction...

22 January 2018 1,290 9 View

Could anybody advise about the demineralization procedure of activated carbons?

Hi All, I'd need to remove inorganic fractions (especially Ca-based ones) from my carbons. What's the typical procedure to apply in order to do that? I'd like to know the main conditions (acid...

22 February 2015 9,491 3 View

What is the best technique for investigating the presence of CaO in a solid sample?

I've seen from the literature that XRF gives results in terms of oxides (e.g. CaO). Is this correct? What's the difference in terms of chemical composition results between XRF, XRD and EDX?

17 June 2014 7,705 13 View

Does anyone have experience with HCl washing after KOH activation?

I need to wash some KOH-activated carbons with HCl. From literature different procedures are reported. Usually the concentration is between 1 and 5 M but just a few studies (almost none of them...

13 June 2014 7,719 4 View

When doing Boehm's titrations, if I consider the blank, do I still have to run the measurement in duplicate to get reliable results?

I'm doing some Boehm's titration's to work out the amount of oxygen basic groups present on my carbons. So I've added 50 ml of HCl to 1 g of carbon. I've done this in duplicate and I'm going to...

28 May 2014 181 2 View

Which are the usual pre-treatments carried out as a general practice onto activated carbon before using it?

I mean, before using ACs for characterisation or other application (e.g. sorption tests), it is supposed to be: Washed with DI water (or which other reagent) Dried at 150 C Is there anything else?

27 February 2014 5,443 8 View

Which is the standard method to determine the moisture content for activated carbons?

According to the ASTM D2867-09 1 g of activated carbon should be heated up to ca. 150 deg C for 3 h. However in most of the papers I checked out the usual conditions reported are 105 degrees C for...

24 February 2014 4,113 4 View

Which ASTM standard should I refer to in order to determine the moisture and volatiles content in biomass?

I managed to find a direct reference to biomass only for the determination of the ash content (E1755-01, http://www.astm.org/Standards/E1755.htm). Should I refer to the standards used for wood as...

03 February 2014 2,984 9 View

What's the procedure (both TGA and loss on ignition in muffle furnace) to perform a proximate analysis of microalgae, in particular spirulina?

I should use TGA by applying the same temperature programme employed for biomass but I would like to know if microalgae decomposition (especially at high temperature, 200-900) could give some...

14 January 2014 8,692 3 View