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並前往https://www.canada.ca/en/health-canada/services/drugs-health-products/compliance-enforcement/information-health-product/drugs/nitrosamine-impurities/test-results.html

Nitrosamine impurities in medications: Test methods and test ...

Internal standard solution-2 (0.2 ppm):: Transfer 5 mL of internal standard solution-1 (20 ... Calibration standard solution, NDMA concentration (ng/mL) ...

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