GOST R ISO 7530-3-2016
GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium
GOST R ISO 7530−3-2016
NATIONAL STANDARD OF THE RUSSIAN FEDERATION
NICKEL ALLOYS
Spectrometric method of atomic absorption in the flame
Part 3
Determination of chromium
Nickel alloys. Flame atomic absorption spectrometric analysis. Part 3. Determination of chromium content
OKS 77.080.20*
AXTU 0709
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* IUS N 8, 2016 GOST R ISO 7530−3-2016 is with ACS 77.120.40,
here and further. — Note the manufacturer’s database.
Date of introduction 2016−11−01
Preface
1 PREPARED by the Federal state unitary enterprise «Central scientific research Institute im.And.P.Bardin," on the basis of their own authentic translation into the Russian language of the international standard indicated in paragraph 4
2 SUBMITTED by the Technical Committee for standardization TC 145 «monitoring Methods of steel products»
3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated 3 March 2016 N 116 St
4 this standard is identical to international standard ISO 7530−3:1990* «the Alloys of Nickel. Spectrometric analysis by the method of atomic absorption in the flame. Part 3. Determination of chromium» (ISO 7530−3:1990 «Nickel alloys — Flame atomic absorption spectrometric analysis — Part 3: Determination of chromium content»).
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* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.
The name of this standard changed with respect to names specified international standard to bring in line with GOST R 1.5 (subsection 3.5).
In applying this standard it is recommended to use instead of the referenced international standards corresponding national standards of the Russian Federation and interstate standards, details of which are given in Appendix YES
5 INTRODUCED FOR THE FIRST TIME
Application rules of this standard are established in GOST R 1.0−2012 (section 8). Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the upcoming issue of the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet (www.gost.ru)
1 Scope
This standard specifies the flame atomic absorption spectrometric method for the determination of chromium in Nickel alloys. The method is applicable for determining the mass fraction of chromium in the range from 0.01% to 4%. Typical chemical composition of some Nickel alloys are given in ISO 7530−1, Annex B.
The General requirements for equipment, sampling, dissolution of the analyzed samples, atomic absorption measurements, calculations and test reports are given in ISO 7530−1.
2 Normative references
This standard uses the regulatory references to the following international standards*:
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* The table of conformity of national standards international see the link. — Note the manufacturer’s database.
ISO 5725:1986 Precision of test methods. Determination of repeatability and reproducibility of a standard method by interlaboratory tests (ISO 5725:1986, Precision of test methods — Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests) GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium
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GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium Are: ISO 5725−1:1994, ISO 5725−2:1994, ISO 5725−3:1994, ISO 5725−4:1994, ISO 5725−5:1998, ISO 5725−6:1994.
ISO 7530−1:1990 Nickel Alloys. Spectrometric analysis by the method of atomic absorption in the flame. Part 1. General requirements and dissolution of samples (ISO 7530−1:1990, Nickel alloys — Flame atomic absorption spectrometric analysis — Part 1: General requirements and sample dissolution) GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium
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GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium Valid ISO 7530−1:2015 «Alloys, Nickel. Spectrometric analysis by the method of atomic absorption in the flame. Part 1. Determination of cobalt, chromium, copper, iron and manganese».
3 the essence of the method
Weighed samples are dissolved in acid and sprayed the solution in denitrated-acetylene flame atomic absorption spectrometer. Measure the amount of absorption of the resonant lines of energy spectrum of CR and compared with the value of the absorbance of the calibration solutions at a wavelength 357,9 nm.
4 Reagents
In addition to the reagents listed in ISO 7530−1, the following special reagents.
4.1 Strontium chloride, solution
In a glass with a capacity of 600 smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of content of chromium is placed shestodnev 113,5 g of strontium chloride (Ghost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium·6НГОСТ R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. The determination of chromeo), dissolved in 400 smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of the chromium content of hot water of 50°C-60°C, the solution was cooled and transferred to volumetric flask with one mark capacity 1000 smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. The determination of chromium. Bring to mark with water and mix. The source of the strontium chloride must be free from salts of heavy metals.
4.2 Chromium, certified standard solution of 1,000 g/dbhost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium
Weigh (nearest 0.001 mg) 1,000 g of chromium metal with a mass fraction of chromium not less than 99.9%. Put a portion into a glass with a capacity of 400 smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium, add 30 smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium hydrochloric acid (GOST R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. The determination хрома1,18 g/smost R ISO 7530−3-2016 Nickel Alloys. Spectrometric method of atomic absorption in the flame. Part 3. Determination of chromium), diluted 1:1, and heated to complete dissolution. The solution was cooled, transferred to a volumetric flask with one mark capacity 1000 cm
