ДСТУ EN ISO 12677:2018 Хімічний аналіз вогнетривів рентгенофлуоресцентним методом (XRF). Метод плавлено-литої краплі (EN ISO 12677:2011, IDT; ISO 12677:2011, IDT)



ДСТУ EN ISO 12677:2018
(EN ISO 12677:2011, IDT; ISO 12677:2011, IDT)

Хімічний аналіз вогнетривів рентгенофлуоресцентним методом (XRF).
Метод плавлено-литої краплі

 
 
   
 
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

1 Scope

2 Normative references

3 Types of material

4 Principle

5 Apparatus

6 Sample grinding

7 Loss on ignition (and/or drying)

8 Flux

8.1 Choice of flux and ratio of flux to sample

8.2 Compensations for moisture in flux

9 Fusion casting procedures

9.1 Fusion of samples and casting of beads

9.2 Automatic bead preparation

9.3 Storage

9.4 Special problems

10 Calibration

10.1 Calibration standards

10.2 Reagents and series reference materials (SeRMs)

10.3 Calibration using reagents

10.4 Calibration using SeRMs

11 Corrections

11.1 Line-overlap correction

11.2 Background correction

11.3 Drift correction

11.4 Calculation of results

11.5 Software requirements

12 Reproducibility and repeatability

12.1 Fusion tests

12.2 Frequency of instrument tests

12.3 Maximum allowance differences of sample holders

12.4 Sample measuring positions

12.5 Instrument repeatability

12.6 Sequential systems

12.7 Dead time

12.8 Other tests

12.9 Flow gas

13 Accuracy determined by certified reference materials

13.1 Validation of synthetic calibrations .

13.2 Validation of SeRM calibrations

13.3 Fresh beads of the CRMs or synthetic standards used to check SeRM calibrations

14 Definitions of limits of detection

15 Test report

Annex A (normative) Calibration range and required detection limits

Annex B (normative) Corrections for tungsten carbide grinding media

Annex C (informative) Examples of fluxes/flux ratios

Annex D (normative) Examples of CRM to be used to check synthetic calibrations

Annex E (normative) Examples of SeRM

Annex F (normative) Equation for theoretical calculations

Annex G (normative) Certified reference materials (CRMs)

Annex H (normative) Method of inter-element correction used to compensate for the effects of co-existing components when using SeRM for calibration

Annex I (normative) Standard deviations achieved with certified reference materials

Bibliography