GB/T 33317-2016 Replaced National standards

GB/T 33317-2016 Plastics—Phenolic resins—Determination of hexamethylenetetramine content—Kjeldahl method,perchloric acid method and hydrochloric acid method

Publish Date: 2016-12-13 Implement Date: 2017-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 33317-2016

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Basic standards and general methods for synthetic resins and plastics

ICS Name: Plastic Composite

Publish Date: 2016-12-13

Implement Date: 2017-07-01

Pages: 12 pages

Scope

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.