Table 2 Variation of some parameters related to X-ray diffraction, UV spectrophotometry and thermal analysis against different γ-irradiation doses (D) varying from (0 to 50) kGy for metoprolol tartrate.

From: Modeling of the irradiation effect on some physicochemical properties of metoprolol tartrate for safe medical uses

D

λ

UV Absorbance

I0(D)/I0 (D = 0)

ΔH1

ΔH2

kGy

Å

—

—

(kJ/g)

(kJ/g)

0

1.54029

0.285

1.000

34.60

116.9

5

1.53998

0.281

0.396

141.9

141.9

15

1.53856

0.295

0.335

102.7

81.80

20

1.54121

0.332

0.940

132.0

144.0

40

1.53714

0.309

1.170

108.0

130.0

50

1.53721

0.345

1.008

119.3

115.7

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