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Chapter II Solution Growth….
2.14 Solubility Curves of Pure and Amino Acid Doped KDP
The solubility data of pure KDP is available in the literature [32]: In the
present study, the author has measured the solubility of various amino acids
added KDP crystals. The representative solubility curves for pure KDP, 0.3 wt
% L-histidine doped KDP, 0.3 wt% L- threonine doped KDP and 0.3 wt % DL-
methionine doped KDP crystals are drown and presented in figure (2.10). It is
found that the solubility of doped KDP increases very marginally with respect
to pure KDP.
Solubility (in gm)
80
70
60
50
40
30
20
Pure KDP
KDP+0.3 Wt.% L-histidine
KDP+0.3 Wt. % L-threonine
KDP+0.3 Wt. % DL-methionine
30 40 50 60 70 80
Temperature (in o C )
Figure: 2.10 Solubility curves for pure and 0.3 wt% various amino acids (L-histidine, L-
threonine and DL-methionine) doped KDP.
2.15 Growth of Pure and Amino Acids Doped KDP Crystals
For the growth of pure and amino acids doped KDP crystals AR grade,
chemicals were used. All the solutions were made in double distilled water. Three
amino acids were selected for doping, viz, L- histidine, L-threonine and DL-
methionine. Various weight percent concentrations of amino acids were selected
for doping, viz, 0.3 wt %, 0.4 wt% and 0.5 wt %, which were obtained by
dissolving 0.3, 0.4 and 0.5 mg selected amino acid into 100 ml solution of one
molar KDP, respectively. The mixture was stirred well by using magnetic stirrer
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