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Quality Control
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The perfect quality system on basis of ISO 9001:2000 for raw material purchasing, whole production processing, qqqquality control, packing, and warehousing. Hecheng S&T possesses well-equipped analytical lab and chemical analysis llalab.
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