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Questions related from Ma. Flynne Dagalea
Can I directly analyze a liquid metal-ligand sample without acid digestion in flame atomic absorption spectroscopy?
26 June 2024 2,327 2 View
Can I ask for a JCPDS card no. 01-083-1436 or CPDS file number 00-031-1979? I need to index a urea derivative compound to the face-centered tetragonal structure, JCPDS card no....
16 May 2024 9,842 2 View
How to generate the CSV/Excel/Notepad/xy file of FTIR spectra (PerkinElmer Spectrum IR)?
06 May 2024 4,251 2 View
Hello, the image below is my cyclic voltammogram for a redox reaction with a metal and a ligand. Should I change certain parameters from during analysis? Or do you have any recommendations. Thank...
23 April 2024 9,574 1 View
Does anyone posses a JCPDS file of hexagonal Ca(OH)2 phase with JCPDS 01-073-5492? We need to cross check our synthesized calcium hydroxide versus reference card versus other file...
04 April 2024 9,910 1 View
Does anyone possess the following files below, we need for XRD analysis: Ca(OH)2 hexagonal phase with JCPDS 04–0733 Ca(OH)2 rhombohedral phase as per JCPDS 05–0586 Thank you. Best...
27 March 2024 7,821 4 View
Hello, the image below is my cyclic voltammogram for a redox reaction with a metal and a ligand. Can you help me explain why I see two reductions and two oxidation cycles, respectively? What can...
01 February 2024 1,226 2 View
Hello, I received just my cyclic voltammogram file but I can't view or read it. Is there someone or anything that can view a .nox file? I already tried several converters but failed to...
14 January 2024 1,844 3 View
I'm curious about the purity of my Hydroxyapatite, can I ask how you usually purify your HAp products, and how you measure its purity, thereafter?
02 July 2023 7,613 3 View
I'm confused on what values to use from the table below, can you help me compute for the Ca/P?
07 June 2023 6,815 4 View
I want to index my mussel shells against aragonite, do you think you can share with me a JCPDS of aragonite ? I need it for my research. Thank you Kindly, Flynne Dagalea
06 June 2023 8,681 0 View
The spectra below is a chemically synthesized hydroxyapatite at 80 degree Celsius for 24 hours. Could you suggest a bond corresponding to 2853-2958 from the spectra below? I expected a broad OH...
06 June 2023 563 3 View
I made hydroxyapatite from mussel shells and ammonium phosphate and calcinated it after. The diffractogram is given below and the crystallinity is calculated as follows CI value is given by: CI =...
01 June 2023 4,719 3 View
I performed XRD analysis of my chitosan sample, I would like to ask for help to interpret its diffractogram. If its possible could someone share with me chitosan JCPDS card 039-1894? Thank...
26 May 2023 5,435 12 View
I tried to bind urea with my hydroxyapatite, but XRD does not confirm it (peaks for urea was not found in the urea-HAp ) nanohybrid. I tried to sonicate the HAP dispersion using a bath type,...
16 May 2023 6,975 3 View
How do I confirm that what I synthesized is hydroxyapatite and not other calcium phosphate compounds (eg. tricalcium phosphate)? Which characterization process should I use to confirm this? You...
13 May 2023 5,616 3 View
This is a hydroxyapatite sample that was calcinated at 900 degrees Celsius, can you help me describe its morphology based on your experience? I think my sample is very much aggregated in my SEM,...
13 April 2023 9,129 2 View
This is a hydroxyapatite sample-2 that was calcinated at 900 degrees Celsius, can you help me describe its morphology based on your experience? I think my sample is very much aggregated in my...
13 April 2023 8,765 3 View
I made Hap using sol-gel method by dissolving mussel shell powderin acetic acid and using this calcium solution to make hydroxyapatite via dropwise addition of phosphoric acid till pH=10, oven dry...
07 April 2023 6,245 5 View
My goal is to counter-check my SEM photo against my XRD data, which the latter (XRD) confirms that I had an almost spherical particle in nanosize scale. I think my sample is still aggregated in...
04 March 2023 5,220 7 View
Can you give the exact chemical equation for synthesizing hydroxyapatite from: calcium acetate and ammonium phosphate? Literature about Hap synthesis from calcium acetate and ammonium phosphate...
17 February 2023 2,580 0 View
The data below were generated from XRD hydroxyapatite, but I'm confused about what should I use to first graph my diffractogram and most importantly the crystallinity of my sample. Could tell me...
04 February 2023 7,530 4 View
I'm at the end of my preliminary experiment for the synthesis of Hap, but I noticed traces of black ink in my dried hydroxyapatite, I tried to search at which temperature the component in black...
30 January 2023 1,024 7 View
Good eve. I am afraid of overshooting the pH of hydroxyapatite solution by combining, Ca(OH)2 suspension and phosphoric acid. Can you suggest an acid solution to adjust the pH=10? Recently I...
20 January 2023 2,238 1 View
Hi I am looking for a simple standardization procedure in standardizing 0.25M Phosphoric acid, perhaps with NaOH, please if you know a procedure. do tell. Thank you!
13 January 2023 3,884 2 View
Which has the capability to determine the molar ratio of Ca/P of hydroxyapatite ; XRD or SEM-EDS?
13 December 2022 6,232 7 View
How is hydroxyapatite formed from calcium acetate and phosphoric acid by chemical precipitation method? Could you explain how can I derive the intermediate calcium hydroxide from it?
09 November 2022 2,950 0 View
Good day! I plan to do away from calcination in preparing nano hydroxyapatite; Could you recommend readings or protocols on nHAp synthesis using the dissolution of calcium carbonate in acetic...
09 November 2022 2,476 0 View
Greetings, Calcium nitrate tetrahydrate and di ammonium hydrogen phosphate were used as precursors for Calcium and Phosphate elements respectively. Corresponding molar solution of calcium nitrate...
01 November 2022 9,504 0 View
Greetings, I am confused as to how can I create hydroxyapatite nanoparticles within the recommended Ca:P ratio? Please give me examples using Ca(OH) and Diammonium Hydrogen...
01 November 2022 7,056 1 View
I will be working on a slow-release fertilizer for my undergraduate thesis, but I am confused about how other authors measure cumulative nitrogen release for a time interval (including the...
15 October 2022 7,664 1 View
Greetings, I am an undergraduate BS chemistry student who is working on a slow-release nano fertilizer, how should I treat my leached samples for each time interval; that is do I employ the...
15 October 2022 9,798 4 View
I'm extracting hydroxyapatite(HAp) from fish bone and using it as a precursor for my Urea-HAp nanohybrid for my undergrad research. My first method is calcination of Fishbone ; CaCaO3 ----(heat...
20 September 2022 5,222 1 View
