GB/T 35809-2018Method for analysis of forestry biomass—Determination of protein content (English PDF)
林业生物质原料分析方法 蛋白质含量测定
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 35809-2018 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 6, 2018
Implementation date
September 1, 2018
Scope
GB/T 35809-2018 is the English-translated version of 林业生物质原料分析方法 蛋白质含量测定.
GB/T 35809-2018 sets out how to determine the protein content of forestry biomass feedstocks.
It covers wood, bamboo, rattan, bark, leaves, fruit shells and other forestry biomass raw materials, and gives two methods: the Kjeldahl method, the classical procedure suitable for every such feedstock, and the Dumas combustion method, a faster route recommended for testing feedstocks in batches.
In the Kjeldahl method the protein is digested with a catalyst under heat, the ammonia released is distilled into boric acid and titrated with standard sulfuric or hydrochloric acid, and the nitrogen found is multiplied by a nitrogen-to-protein factor.
The standard also lists the reagents and materials, the instruments and equipment, the analytical steps and how results are expressed. It was issued on 6 February 2018 and has applied since 1 September 2018.
Found what you need?
Document preview — GB/T 35809-2018
National Standard of the People's Republic of China
- ICS
- 79.010
- Classification
- B 60
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Kjeldahl method
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies methods, reagents and materials, instruments and equipment, and analytical procedures for the determination of protein content in forestry biomass feedstocks. Expression of results, etc.
This standard applies to wood, bamboo, rattan, bark, leaves, fruit shells and other forestry biomass raw materials.
This standard adopts Kjeldahl method and Dumas combustion method. The former is a classical method for determining protein content and is applicable to each method.
A forestry biomass feedstock; the latter is an efficient method for the rapid determination of protein content, and is used to push forward the rapid detection of forestry biomass feedstocks in batches. Recommended for use.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 30366-2013 biomass terminology
3 Terms and Definitions
The terms and definitions defined in GB/T 30366-2013 and the following apply to this document.
3.1 Forestry biomass
Biomass produced during the production and processing of forestry mainly includes forest products (such as wood, bamboo, rattan, etc.) and forestry residues (such as branches). Slag, sawdust, sawdust, shoots, slats and truncated, husks and kernels and other processing residues and processing residues, paper-making waste, and waste wood) Energy forest and so on. [GB/T 30366-2013, definition 2.1.3]
4 Kjeldahl method
4.1 Principle
The protein in the forestry biomass raw material is decomposed under the condition of catalytic heating, and the generated ammonia gas is combined with the sulfuric acid to generate ammonium sulfate, alkalized steaming Distillation ammonia free, absorbed with boric acid, titrated with sulfuric acid or hydrochloric acid standard titration solution, determine the nitrogen content according to the consumption of acid and multiplied by nitrogen For the protein coefficient, you can get the protein content of raw materials.
4.2 Reagents and Materials
The reagents used in this standard method are all analytically pure (except as otherwise specified). The water is either distilled or deionized water.
4.2.1 Copper sulfate (CuSO4·5H2O).
4.2.2 Potassium sulfate (K2SO4).
4.2.3 Sulfuric acid (H2SO4). The density is 1.84g/L.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
Similar standards
How to Download GB/T 35809-2018
- 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 10003-2026 — Biaxially oriented polypropylene (BOPP) film
GB/T 10004-2026 — Plastic/Plastic laminated films and pouches for packaging
GB/T 10007-2026 — Rigid cellular plastics - Determination of shear properties
Secure payment via Stripe
Payments accepted
GB/T 35809-2018
$85.00