HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (25 Oct 2025)

GB/T 38812.2-2020 PDF English

US$95.00 · In stock · Download in 9 seconds
GB/T 38812.2-2020: Direct reduced iron--Determination of metallic iron content--The potassium dichromate titrimetric method after decomposition of sample by ferric chloride
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 38812.2-2020English95 Add to Cart 0-9 seconds. Auto-delivery Direct reduced iron--Determination of metallic iron content--The potassium dichromate titrimetric method after decomposition of sample by ferric chloride Valid

Excerpted PDFs (Download full copy in 9 seconds upon purchase)

PDF Preview: GB/T 38812.2-2020
      

Similar standards

GB/T 38812.1   GB/T 37829   GB/T 36144   GB/T 24237   

GB/T 38812.2-2020: Direct reduced iron--Determination of metallic iron content--The potassium dichromate titrimetric method after decomposition of sample by ferric chloride


---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38812.2-2020
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.060.10 D 31 Direct reduced iron - Determination of metallic iron content - The potassium dichromate titrimetric method after decomposition of sample by ferric chloride ISSUED ON: JUNE 02, 2020 IMPLEMENTED ON: DECEMBER 01, 2020 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China.

Table of Contents

Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Principle ... 5 4 Reagents and materials ... 5 5 Instruments ... 6 6 Sampling and sample preparation ... 6 7 Analysis steps ... 6 8 Result calculation and expression ... 7 9 Test report ... 8 Appendix A (Normative) Sample analysis result acceptance procedure flow chart ... 9 Direct reduced iron - Determination of metallic iron content - The potassium dichromate titrimetric method after decomposition of sample by ferric chloride Caution -- The personnel who uses this Part shall have hands-on experience in formal laboratory work. This Part does not address all possible security issues. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions which are set by the relevant national regulations.

1 Scope

This Part of GB/T 38812 specifies the potassium dichromate titrimetric method after decomposition of sample by ferric chloride to determine the metallic iron content. This Part applies to the determination of metallic iron content in direct reduced iron; the determination range (mass fraction): ≥ 50.00%.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682, Water for analytical laboratory use - Specification and test methods GB/T 8170, Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 12805, Laboratory glassware - Burettes GB/T 12806, Laboratory glassware - One-mark volumetric flasks GB/T 12808, Laboratory glassware - One mark pipettes

5 Instruments

5.1 Common laboratory equipment that is used in the analysis. Burettes, one- mark volumetric flasks and one mark pipettes shall meet the requirements of GB/T 12805, GB/T 12806 and GB/T 12808. 5.2 Oscillator: reciprocating multi-functional oscillator. Oscillation frequency: 150 times/min ~ 160 times/min; amplitude: 20 mm (reciprocating).

6 Sampling and sample preparation

Perform sampling and sample preparation according to the provisions of GB/T 24239.

7 Analysis steps

7.1 Number of determinations Make at least two independent determinations on the same sample. Note: "Independent" means that the second and any subsequent determination result is not affected by the previous determination result. In this analysis method, this condition means that in the same laboratory, the same operator uses the same equipment and the same test method to independently repeat the determination on the same tested object in a short time, including the use of appropriate recalibration. 7.2 Sample mass Weigh 0.10 g of sample, to the nearest 0.000 1 g. 7.3 Blank test Carry out a blank test along with the sample. 7.4 Determination 7.4.1 Sample decomposition Place the sample (see 7.2) in a dry 300 mL conical flask; add 40 mL of ferric trichloride solution (see 4.4); stopper the bottle; place it on an oscillator and shake for 40 min. Use a medium-speed filter paper to filter; collect the filtrate in a 500 mL conical flask. Use water to wash the conical flask, stopper and residue 6 ~ 8 times; control the solution volume to 150 mL ~ 200 mL. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

Tips & Frequently Asked Questions

Question 1: How long will the true-PDF of English version of GB/T 38812.2-2020 be delivered?

Answer: The full copy PDF of English version of GB/T 38812.2-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.

Question 2: Can I share the purchased PDF of GB/T 38812.2-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 38812.2-2020_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. www.ChineseStandard.us -- GB/T 38812.2-2020 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.

How to buy and download a true PDF of English version of GB/T 38812.2-2020?

A step-by-step guide to download PDF of GB/T 38812.2-2020_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 38812.2-2020".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3    Steps 4~6    Step 7    Step 8    Step 9