| Chlortetracycline Description: Molecularweight: 478.89
Term of Validity: 18 month (1.5 year)
Standard: The Veterinary Standard of the Ministry of Agriculture, China
Analytical Method
Official Methods of Analysis of the Association of Official Analytical Chemists, USA 15th Edition, 1990 (AOAC Method) and content by HPLC
Regular Quality Index for CTC 15%/ 20%Feed Grade (Powder/ Granule)
| Index name |
Specifications or Standard |
Method |
| |
Powder |
Granular |
| Identification |
Positive |
Positive |
Chemical Method |
| Appearance |
Brown to dark brown powder,Not lumpy or moldy, no unpleasant odor |
Brown to dark brown granular,Not lumpy or moldy , no unpleasant odor |
Visual Method |
| Fineness |
Diameter 0.425mm 90% min. pass through |
Diameter 0.25mm-0.85mm 90% min. pass through |
Sieve through |
| PH value |
5.0-7.5 |
5.0-7.5 |
Apparatus |
| CTC Content |
15% min / 20% min |
15% min / 20% min |
HPLC method |
| Loss on drying |
≤ 8.0% |
≤ 8.0% |
Apparatus |
| Heavy Metals |
≤ 20ppm |
≤ 20ppm |
Colorimetric |
| Arsenic |
≤ 2ppm |
≤ 2ppm |
Colorimetric |
| TC Content |
≤ 1.2% / 1.6% |
≤ 1.2% / 1.6% |
HPLC method |
| 4-epi CTC |
≤ 0.9% / 1.2% |
≤ 0.9% / 1.2% |
HPLC method |
|
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