L-Threonine feed grade
|
ITEM
|
SPECIFICATION
|
RESULTS
|
|
Assay
|
>98.5%
|
98.9%
|
|
Specific Rotation [α]D20
HCL solution
|
-26.00 ~ -29.00
|
-27.90
|
|
Loss on drying
|
<1.0%
|
0.12%
|
|
Heavy metals (as Pb)
|
<20 ppm
|
<20ppm
|
|
Arsenic (as As)
|
<2ppm
|
<2ppm
|
|
Ignited residue
|
<0.5%
|
0.05%
|
Conclusion: The above materiel complies with the standard of GB/T21979–2008