Standard No.:	GB/T 5009.125-2003
Chinese Name:	尼龙6树脂及成型品中已内酰胺的测定
English Name:	Determination of 6-caprolactam in nylon 6 resin and its products
Professional Classification:	C53 Food sanitation
Professional Classification:	GB National Standard
ICS Classification:	67.040
Issued by:
Issued on:	2003-08-01
Implemented on:	2004-01-01
Status:	ABOLISHED
Replace By:	GB31604.19-2016
Replace By Date:
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	60 (USD)
Delivery:	via email in 1-3 business day

1 Scope
This standard specifies methods for caprolactam determination by high performance liquid chromatography.
This standard is applicable to determination of caprolactam in nylon 6 resin and its products polymerized of caprolactam.
Detection limit by this method is 2ng, calculated by sample injection 10μL and the lowest detection concentration is 0.2 mg/L.
2 Principle
After nylon 6 resin or its products is soaked by boiling water bath and taken in, the caprolactam in test piece dissolves in soak solution, high performance liquid chromatography is directly adopted for separation and determination to reserve time qualitative, peak height or peak area quantitation.