Antonio Salituro

22 Questions 46 Answers 0 Followers

Questions related from Antonio Salituro

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...

01 January 2020 4,515 4 View

Could anybody provide a reference on the X-ray diffraction pattern of silicon?

Hello, I am after a paper reporting the X-ray diffraction pattern of silicon, possibly including all the diffraction peak positions. Thanks, Antonio

10 October 2019 9,714 4 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...

05 May 2019 4,244 5 View

How can I calculate the time per step if scan range, scan speed and step size are known?

Hello All, I am trying to reproduce an XRD method. I know scan range, scan speed and step size. How do I work out the time per step? Thanks, Antonio

06 June 2018 362 8 View

Could anybody provide references to water vapour pressure data at 25deg for the saturated solutions of the following salts?

I am just looking for references on water vapour pressures for the saturated solutions of the following salts: LiBr LiCl MgCl2 Mg(NO3)2 NaCl KCl KNO3 I have found the following reference...

03 March 2018 8,428 2 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...

01 January 2018 2,629 10 View

Could anybody suggest how to calculate the heat of adsorption/desorption from heat flow data (DSC) in mW?

Hi, I have got some DSC data related to the heat flow in mW (milliWatt I presume?) measured during adsorption/desorption of CO2 onto/from an activated carbon. I'm getting some inconsistent...

06 June 2015 3,059 5 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...

02 February 2015 9,275 4 View

Could anyone recommend any companies in UK to purchase activated carbons from?

I'd need to purchase some activated carbons. Ideally, I would need two different type of products, a carbon having high micropore volume (d

07 July 2014 2,351 2 View

Has anybody been to any previous editions of the EUEC (Energy, Utility & Environment Conference)?

I'm planning to go to this year's edition in San Diego. It looks like a big event. My project is about CO2 capture so it kind of fits quite well in there. However, it would be nice to get some...

07 July 2014 2,720 1 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?

06 June 2014 768 15 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...

06 June 2014 2,170 5 View

How can I get a quantitative estimation about the basicity of activated carbons?

I need to investigate the basic/acid character of my activated carbons. Which procedure/technique should I follow in order to do that? I have been told to apply Boehm's titrations. Is it the most...

05 May 2014 6,143 9 View

Which is the biggest event (conference) about CCS taking place in 2015?

I'm looking for some good conferences (possibly the best one) to apply for about CO2 capture systems in 2015 (or any earlier as long as the papers submission is still open). Could you please...

05 May 2014 7,769 0 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...

05 May 2014 3,080 3 View

What is the best characterization technique in order to investigate the surface functionalities present on the chars/activated carbons structure?

I know that XPS could be a good route to see which kind of functional (oxygen or nitrogen based) groups are onto the material structure. Am I right? However, any other suggestions will be really...

03 March 2014 2,371 45 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...

02 February 2014 3,230 10 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...

02 February 2014 4,698 5 View

What's the density conversion factor expressed in cm3liq/cm3gas for CO2?

I measured the CO2 adsorption isotherms and I need to convert the maximum capacity (isotherm ordinate) expressed as cm3 CO2 (gas)/g adsorbent in cm3 CO2 (liq)/g adsorbent. I suppose this is the...

01 January 2014 413 0 View

Which are the ASTM steps in order to perform proximate for biomass?

Are the following details correct? sample mass = 1g 105 C for 2-3 h (moisture) 550 C for 6 h (ashes) 950 C for 7 min (volatiles) Also, are the previous steps supposed to be applied as a sequence?

01 January 2014 3,019 0 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...

01 January 2014 7,214 3 View

Which procedure should I follow to wash some activated carbons which have been impregnated with a basic viscous polymer (Polyethylenimine)?

Should I wash the sample through the filter after the wet impregnation? Also, is it supposed to use hot, cold and/or distilled water? Finally, is there a specific amount of water/no. of rinses...

01 January 2014 8,124 8 View