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BS EN 10178:2024

BS EN 10178:2024

$102.76

Steels. Determination of niobium. Spectrophotometric method

Published By Publication Date Number of Pages
BSI 2024 16
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This document specifies a spectrophotometric method for the determination of niobium in steels. The method is applicable to all grades of steels with niobium contents up to 1,3 % (by mass), with a lower limit of detection of 0,002 % (by mass). The precision data of the present method are given in Annex A.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 European foreword
6 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
8 6 Apparatus
7 Sampling
8 Procedure
8.1 Test portion
8.2 Blank test
8.3 Determination
8.3.1 Preparation of the test solution
8.3.2 Separation of the niobium
9 8.3.3 Development of the colour
Table 1 ā€” Volume of the aliquot
8.3.4 Spectrophotometric measurement
8.4 Establishment of the calibration curve
8.4.1 Preparation of the calibration solutions
10 Table 2 ā€” Calibration solutions
8.4.2 Spectrophotometric measurements
8.4.3 Plotting the calibration curve
11 Table 3 ā€” Relationships with the calibration curve for 10 ml and 5 ml aliquots
9 Expression of results
10 Test report
13 Annex A (informative) Precision data
Table A.1 ā€” Statistical information
14 Bibliography

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BS EN 10178:2024
$102.76