ISO 17942:2014
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of boron nitride powders
Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of boron nitride powders
ISO 17942:2014 specifies the methods for the chemical analysis of fine boron nitride powders used as the raw material for fine ceramics. It stipulates the analysis methods of total boron, free boron, total nitrogen, aluminium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, potassium, silicon, sodium, titanium, vanadium, zinc, carbon, and oxygen in boron nitride powders for fine ceramics. Total boron is determined by using either a fusion?titration method or a fusion?inductively coupled plasma-optical emission spectrometry (ICP-OES). Free boron is determined by using either an acid digestion?ICP-OES or a methanol extraction?ICP-OES. If necessary, the boron amount which arises from the hydrolysis of boron nitride during sample treatment is corrected using spectrophotometry. Total nitrogen is determined by using either an acid pressure decomposition?distillation separation?titration method or an inert gas fusion?thermal conductivity method. Silicon is determined by using a fusion?ICP-OES. Aluminium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, titanium, vanadium, zinc are determined by using an acid pressure decomposition?ICP-OES or a fusion?ICP-OES. Sodium and potassium are determined by using atomic absorption spectrometry (AAS), flame emission spectrometry (FES), or ICP-OES following acid pressure decomposition. Carbon is determined by using a combustion?IR absorption spectrometry or a combustion?thermal conductivity method. Oxygen is determined by using an inert gas fusion?IR absorption spectrometry.
Céramiques techniques — Méthodes pour l'analyse chimique de poudres de nitrure de bore
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 17942
First edition
2014-08-15
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Methods for chemical analysis of
boron nitride powders
Céramiques techniques — Méthodes pour l’analyse chimique de
poudres de nitrure de bore
Reference number
©
ISO 2014
© ISO 2014
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ii © ISO 2014 – All rights reserved
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 General rules in chemical analysis . 1
4 Analysis items . 1
5 Sampling, weighing, and drying of sample . 2
5.1 Sampling . 2
5.2 Weighing . 2
5.3 Drying . 2
6 Reporting analytical values . 3
6.1 Number of analyses. 3
6.2 Blank test . 3
6.3 Evaluation of analytical values . 3
6.4 Expression of analytical values . 3
7 Determination methods of total boron . 3
7.1 Classification of determination methods . 3
7.2 Fusion-acidimetric titration method . 4
7.3 Fusion-ICP-OES . 6
8 Determination methods of free boron . 8
8.1 Classification of determination methods . 8
8.2 Sulfuric acid digestion-ICP-OES and spectrophotometry . 9
8.3 Nitric acid digestion-ICP-OES .11
8.4 Methanol extraction-borate separation-ICP-OES and spectrophotometry .12
9 Determination methods of total nitrogen .16
9.1 Classification of determination methods .16
9.2 Acid pressure decomposition-distillation separation-acidimetric titration method .17
9.3 Fusion-ammonia separation-acidimetric titration method .22
9.4 Inert gas fusion-thermal conductivity method .22
10 Determination method of silicon .26
10.1 Determination method.26
10.2 Principle .26
10.3 Reagents.26
10.4 Apparatus and instrument .27
10.5 Amount of sample .27
10.6 Operation .27
10.7 Blank test .27
10.8 Drawing calibration curves .27
10.9 Calculation .28
11 Determination methods of aluminium, cadmium, calcium, chromium, cobalt, copper, iron,
lead, magnesium, manganese, nickel, titanium, vanadium, and zinc .28
11.1 Classification of determination methods .28
11.2 Acid pressure decomposition-ICP-OES .28
11.3 Fusion-ICP-OES .31
12 Determination methods of sodium and potassium .34
12.1 Classification of determination methods .34
12.2 Acid pressure decomposition-AAS.35
12.3 Acid pressure decomposition-FES .37
12.4 Acid pressure decomposition-ICP-OES .39
13 Determination methods of carbon .41
13.1 Classification of determination methods .41
13.2 Combustion (resistance furnace)-IR absorption spectrometry .42
13.3 Combustion (RF furnace)-conductometry .45
13.4 Combustion (RF furnace)-IR absorption spectrometry .47
13.5 Combustion (resistance furnace)-coulometry .49
13.6 Combustion (resistance furnace)-gravimetry .49
13.7 Combustion (resistance furnace)-conductometry .49
14 Determination method of Oxygen .49
14.1 Determination method.49
14.2 Inert gas fusion-IR absorption spectrometry .49
15 Test report .52
Annex A (informative) List of commercial certified reference materials .53
Annex B (informative) Analytical results obtained from a round robin test .54
Annex C (informative) Spectral lines for ICP-OES .58
Bibliography .59
iv © ISO 2014 – All rights reserved
Foreword
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