GB/T 41965-2022 Active National standards

GB/T 41965-2022 Photography—Processing waste—Determination of total amino nitrogen(microdiffusion Kjeldahl method)

Publish Date: 2022-12-30 Implement Date: 2023-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 41965-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Photographic-grade chemicals

ICS Name: Special waste

Publish Date: 2022-12-30

Implement Date: 2023-07-01

Pages: 15 pages

Scope

This document describes a method for determining the total organic nitrogen and any ammonia nitrogen content in photographic rinse wastewater using the Kjeldahl nitrogen method. This method can determine the total Kjeldahl nitrogen in photographic rinse wastewater with an ammonia concentration range of 10 mg/L to 200 mg/L, or a nitrogen concentration range of 8 mg/L to 160 mg/L. If the ammonia nitrogen is measured and subtracted separately (see ISO 6853), the concentration of organic amino nitrogen can be determined.

Development Information

Word Count: 32 Thousand words Pages: 15 pages

Referenced Standards

ISO 648 ISO 1042 ISO 5667-1 ISO 5667-2 ISO 5667-3 ISO 6353-1 ISO 6353-2 ISO 6353-3 ISO 10349-1

Adopt standards

ISO 6851:2001

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