GB/T 33317-2016
GB/T 33317-2016 Plastics—Phenolic resins—Determination of hexamethylenetetramine content—Kjeldahl method,perchloric acid method and hydrochloric acid method
Abstract
This standard specifies three methods for determining the content of hexamethyltetramine in phenolic resins. These three methods are equivalent. The Kjeldahl nitrogen determination method specified in Chapter 3 is not applicable to phenolic resins containing other nitrogen compounds. The perchloric acid method and hydrochloric acid method specified in Chapters 4 and 5 are not applicable to phenolic resins containing other acidic or alkaline substances. If the resin contains additives that can be oxidized by perchloric acid, only the hydrochloric acid method specified in Chapter 5 can be used.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Replaced |
| Standard Code | GB/T 33317-2016 |
| CCS | Basic standards and general methods for synthetic resins and plastics |
| ICS | Plastic Composite |
| Implement Date | 2017-07-01 |