GB/T 39138.2-2020Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method (English PDF)
金镍铬铁硅硼合金化学分析方法 第2部分：镍含量的测定 丁二酮肟重量法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 39138.2-2020 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 11, 2020
Implementation date
September 1, 2021
Scope
GB/T 39138.2-2020 is the English-translated version of 金镍铬铁硅硼合金化学分析方法 第2部分：镍含量的测定 丁二酮肟重量法.
GB/T 39138.2-2020 is the Chinese standard "Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method".
Its scope clause reads: This part of GB/T 39138 specifies a method for the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys. This section applies to the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys.
Measuring range. 60.00%~80.00%. Its clauses include method principle; reagent; instruments.
Found what you need?
Document preview — GB/T 39138.2-2020
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 15
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method principle
- 3 reagent
- 4 Instruments
1 Scope
This part of GB/T 39138 specifies a method for the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys.
This section applies to the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys. Measuring range. 60.00%~80.00%.
2 Method principle
The sample is decomposed with hydrochloric acid and a saturated solution of nitric acid-potassium chlorate. Sulfurous acid eliminates the interference of gold. In ammonia medium, nickel and diacetyl oxime produce
The precipitate is separated from other elements, the precipitate is filtered, washed and dried to constant weight, and the mass fraction of nickel is calculated. At the same time, the filtrate uses air-acetylene fire
Flame, in hydrochloric acid medium, at the wavelength of 232.00nm of atomic absorption spectrometer, measure the absorbance of nickel, and calculate the amount of nickel by working curve method.
Correction.
3 reagent
Unless otherwise specified, only use reagents and distilled or deionized water or equivalent purity water confirmed to be analytically pure in the analysis.
3.1
Potassium chlorate.
3.2
Ammonium chloride.
3.3
Hydrochloric acid (rho=1.19g/mL).
3.4
Nitric acid (rho=1.42g/mL).
3.5
Sulfurous acid (rho=1.03g/mL).
3.6
Hydrochloric acid (1 1).
3.7
Nitric acid (1 1).
3.8
Ammonia (1 1).
3.9
Ammonia washing solution (1 19).
3.10 Nitric acid-potassium chlorate saturated solution
Dissolve potassium chlorate (3.1) in nitric acid (3.4) until saturated.
3.11
Potassium sodium tartrate solution (200g/L), use after filtration.
3.12
Ammonium acetate solution (200g/L), use after filtration.
3.13
Diacetyl oxime ethanol solution (10g/L), use after filtration.
3.14 Nickel standard storage solution
Weigh 0.1000g of metallic nickel (mass fraction >=99.99%), place it in a 250mL beaker, and add 10mL
Nitric acid (3.7), cover with a watch glass, heat at low temperature to dissolve completely, transfer to a 100mL volumetric flask, dilute to the mark with water. Mix well. This solution
1mL contains 1000µg nickel.
3.15 Nickel standard solution
Pipette 10.00mL nickel standard stock solution (3.14) into a 100mL volumetric flask, add 10mL hydrochloric acid (3.6),
Dilute to the mark with water. Mix well. This solution 1mL contains 100µg nickel.
4 Instruments
4.1
Glass sand core crucible, 30mL, G4 (glass sand core crucible model). pore size 4µm~7µm.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
How to Download GB/T 39138.2-2020
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 39138.3-2020 — Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3: Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry
GB/T 39138.1-2020 — Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 1: Determination of gold content - Potentiometric titration using ferrous sulfate
GB/T 10003-2026 — Biaxially oriented polypropylene (BOPP) film
Secure payment via Stripe
Payments accepted
GB/T 39138.2-2020
$90.00