Published August 23, 1989 | Version v1
Patent Open

Method for spectrophotometric determination of tungsten in alloyed steels

Creators

Description

A highly selective and accurate method for tungsten determination in alloyed steels is suggested, which consists in the treatment of analyzed solution by 4-sulfobenzeneazopyrocatechol in the presence of 500-multiple excess of ascorbic acid and unithiol at pH 0.6-1.2 and measurement of optical density of solutions analyzed. The accuracy of W determination by this method surpasses the known methods by a factor of 1.5, relative standard deviation being 0.02. 1 tab

Availability note (English)

MF available from INIS under the Report Number.

Files

22021863.pdf

Files (110.8 kB)

Name Size Download all
md5:5861b1eb60c4289637230beeff49b733
110.8 kB Preview Download

System files (8.9 kB)

Name Size Download all

Additional details

Additional titles

Original title (Russian)
Способ спектрофотометрического определения вольфрама в легированных сталях

Publishing Information

Imprint Pagination
5 p.
IPC:
Int. Cl. G01N 31/22.
IPC
Int. Cl. G01N 31/22.
Patent number
SU patent document 1503009/A1/

INIS

Country of Publication
USSR
Country of Input or Organization
USSR
INIS RN
22021863
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ACCURACY; AZO COMPOUNDS; INTERFERING ELEMENTS; POLYPHENOLS; QUANTITATIVE CHEMICAL ANALYSIS; SPECTROPHOTOMETRY; STEELS; TUNGSTEN; TUNGSTEN COMPLEXES
Descriptors DEC
ALLOYS; AROMATICS; CARBON ADDITIONS; CHEMICAL ANALYSIS; COMPLEXES; ELEMENTS; HYDROXY COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; METALS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHENOLS; TRANSITION ELEMENT COMPLEXES; TRANSITION ELEMENTS

Optional Information

Secondary number(s)
SU patent application 4259597/31-26.