GB/T 31931-2015 in English

VALID

Zinc or zinc alloy coating on steel sheets or strips―Determination of hexavalent chromium content―1,5-Diphenylcarbohydrazide(diphenylcarbazide) spectrophotometric method

Issued on:2015-09-11
Implemented on:2016-06-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $80.00
$78.00

Standard No:	GB/T 31931-2015
Document status:	VALID
Title in English:	Zinc or zinc alloy coating on steel sheets or strips―Determination of hexavalent chromium content―1,5-Diphenylcarbohydrazide(diphenylcarbazide) spectrophotometric method
Title in Chinese:	钢板及钢带锌及锌合金镀层中六价铬含量的测定二苯碳酰二肼分光光度法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2015-09-11
Implemented on:	2016-06-01
ICS Classification:	77.080.01-Ferrous metals in general
Chinese Classification:	H11-Steel and iron alloy analysis method
Professional Classification:	GB-National Standard
Related Keywords:	hexavalent chromium content zinc alloy coating pure zinc spectrophotometric method scopethis standard steel sheets
Related Topics:	Hexavalent chromium GB/T 31931-2015 GB/T+31931-2015 Hexavalent chromium in German Diphenylcarbazide GB/T 31931 Determination of hexavalent chromium in water by spectrophotometry Diphenyl zinc content Determination of hexavalent chromium in water diphenyl Hexavalent chromium content Hexavalent chromium Spectrophotometric method for the determination of trivalent chromium Hydrazine Hexavalent Chromium Hexavalent chromium content diphenylhydrazine spectrophotometry Determination of Hexavalent Chromium by Ultraviolet Spectrophotometry Spectrophotometric Determination of Hexavalent Chromium Determination of Zinc in Water by Spectrophotometry with Zinc Reagent Diphenylcarbahydrazide hexavalent chromium Carbon benzene Diphenylcarbahydrazide hexavalent chromium Spectrophotometric Hexavalent Chromium Spectrophotometric divalent cobalt GBT31931 GB/T 31931-2015 diphenylcarbazide spectrophotometry zinc Steps for determination of hexavalent chromium using diphenylcarbamate spectrophotometry Pretreatment for determination of hexavalent chromium by dpc spectrophotometry Experiment on determination of chromium ion concentration in water samples using diphenylcarbazide spectrophotometry Precautions for determination of hexavalent chromium by diphenylcarbazide spectrophotometry Principle of Cr determination by diphenylcarbazide spectrophotometry Chromic acid mist diphenylcarbazide spectrophotometry Hexavalent Chromium UV Spectrophotometry Determination method of carbohydrazide content

《GB/T 31931-2015钢板及钢带锌及锌合金镀层中六价铬含量的测定二苯碳酰二肼分光光度法》由TC183（全国钢标准化技术委员会）归口，主管部门为中国钢铁工业协会。
本标准规定了二苯碳酰二肼分光光度法测定六价铬含量的方法。
本标准适用于钢板及钢带表面锌及锌合金镀层,其中包括镀纯锌、锌铁合金、锌铝和铝锌合金表面六价铬含量的测定。测定范围:2μg/g~100μg/g或0.020μg/cm2~10μg/cm2。

Scope

This standard specifies the method for the determination of hexavalent chromium content by diphenylcarbazide spectrophotometry. This standard applies to zinc and zinc alloy coatings on the surface of steel sheets and strips, including the determination of hexavalent chromium content on the surface of pure zinc, zinc-iron alloys, zinc-aluminum and aluminum-zinc alloys. Measuring range: 2 μg/g～100 μg/g or 0.020 μg/cm²～10 μg/cm².

More samples: JGJ 94-2008 DL/T 368-2010 QC/T 942-2021

Sample only — not a preview of GB/T 31931-2015

Loading PDF document...

Error loading PDF. Please make sure the file is valid and try again.

We also recommend

GB/T 223.6-2025 in English

Iron, steel and alloy—Determination of boron content—Neutralization titrimetric method and spectrophotometric method
2025-08-29
GB/T 223.31-2026 in English

Iron, steel and alloy—Determination of arsenic content—spectrophotometric method and iodimetric method
2026-02-27
GB/T 20123-2006 in English

Steel and iron—Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)
2006-03-02
GB/T 223.23-2008 in English

Iron, Steel and Alloy-Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
2008-05-13
GB/T 24520-2009 in English

Cast iron and low alloy steel—Determination of lanthanum, cerium and magnesium content—Inductively coupled plasma atomic emission spectrometric method
2009-10-30