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Quality Assurance

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The perfect quality system on basis of ISO 9001:2015 for raw material purchasing, whole production processing, quality control, packing, and warehousing. Hecheng S&T possesses well-equipped analytical lab and chemical analysis lab.

 

 

 

Raw materials:

a) GC purity

b) HPLC purity

c) m.p. ( b.p.)

d) titration analysis

 

Resin:

a) IR

b) Loading

c) Appearance

d) Particle size

e) Loss on drying

f) Loss on solvent washing

g) Resin swelling in DCM (or DMF)h) Partical distribution

 

Fine chemical:

a) IR

b) NMR

c) m.p.(b.p.)

d) HPLC purity

 

 

 

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