the peaks you collected are due to sodium alginate? Do you verified with a crystallographic database? The peaks could be so narrow in case of highly crystalline materials
Hi, instrument was aligned and it was powder mode , problem is that sodium alginate is semi crystalline, but here my sample gave these sharp peaks, moreover I verified this with ftir which gave the peaks as established in literature.
To get a sustainable solution to your problem, please refer to the preprint article given at link DOI: 10.13140/RG.2.2.27720.65287/3 or at link https://www.researchgate.net/publication/352830671.