Fareezex Mohd Rawi

12 Questions 10 Answers 0 Followers

Questions related from Fareezex Mohd Rawi

In Differential Scanning Calorimetry (DSC) analysis, do I need to subtract with blank sample?

As for TGA analysis, in order to get better result for the curve, it is recommended for us to subtract with the blank curve. So how about DSC?

15 August 2018 5,673 8 View

In TGA, which one I need to use, Program Temperature or Sample Temperature?

In TGA/DSC (Brand Perkin Elmer, Mettler Toledo), I noticed that there will be always temperature differences between Program Temperature and Sample Temperature for all result. In your opinion,...

27 October 2017 5,068 6 View

In BET anaysis, why does the adsorption and desorption curve is not overlap each other?

Recently I noticed it happen to a few sample for this gap. If I run a standard sample Silica-Alumina for example, the curve is overlapping between a few first point of adsorption and a few end...

28 March 2017 5,254 3 View

What is the best analytical instrument to perform elemental analysis?

There are quite of numbers of instrument to perform elemental analysis such as EDX, XRF, etc. What are the pro and con? Recently I noticed that there are high percentage of an element for C and O...

07 February 2017 3,953 9 View

In XRD, is there any link between ICDS, ICDD and JCPDS?

Is there any link between ICDS (inorganic crystal structure database), ICDD (International Centre for Diffraction Data) and JCPDS (Joint Committee on Powder Diffraction Standards)? Because right...

20 December 2016 6,257 11 View

In general, is the weight will effect the result in BET for N2 adsorption at a standard temperature (77 K) analysis?

In general, is the weight will effect the result in BET for N2 adsorption at a standard temperature (77 K) analysis? Say the weight is less than 0.05g.

21 November 2016 4,449 6 View

What are the factors for misfire for Bomb Calorimeter to happen?

What are the factors for misfire for Bomb Calorimeter to happen? Recently I've noticed that this equipment can't give a result because of misfire during the operation. And I've noticed that the...

27 September 2016 9,746 2 View

TGA graph shows a weight gain even run a blank sample. Why?

I've noticed that each time I run blank sample for TGA (cleaning process), it always shows a weight gain. Is that possible my Sample Pan has been contaminated? If yes, is that possible it was...

22 September 2016 131 7 View

Is there any specific explanation why I need to use lower strain for stiff sample and higher strain for rubbery sample?

Model: DMA 8000 Brand: Perkin Elmer Analysis: Dynamic method, temp range -80 to 30degree, heating rate 3deg/min. Is there any specific explanation why I need to use lower strain for stiff sample...

30 August 2016 7,838 2 View

Why my TGA graph shows a weight gain?

My sample is copper, run under Nitrogen gas at 20ml/min. Temperature range is 30deg - 990deg. I already subtracted with blank curve which is I perform with the same parameter.However, the curve...

21 August 2016 2,573 11 View

What is the Z-average size for particle can be considered as nano range?

In general, what is the Z-average size for the particle can be considered as nano range? For example, the result I obtain for Particle Size is 10nm. Can it be concluded that my sample is in nano...

26 July 2016 5,009 5 View

Based on Isotherm Linear Plot for BET , should I decrease or increase the taking point?

I believe it is not necessary to put more taking point at hysteresis area as well. The main point is, make sure adsorption and description is well overlapping each other at the beginning and end...

24 January 2016 6,025 2 View