GB/T 31816-2015Water treatment chemicals—Determination of the molecular weight and molecular weight distribution of polymers—Gel filtration chromatography (English PDF)
水处理剂 聚合物分子量及其分布的测定 凝胶色谱法
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 31816-2015 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 3, 2015
Implementation date
February 1, 2016
Scope
GB/T 31816-2015 is the English-translated version of 水处理剂 聚合物分子量及其分布的测定 凝胶色谱法.
GB/T 31816-2015 specifies the method and the test conditions for determining the molecular weight of polymeric water treatment agents and its distribution by gel filtration chromatography (GFC).
Clause 1 states that the standard applies to the determination of the relative average molecular weight and the molecular weight distribution of water-soluble polymer water treatment agents, and that it serves for molecular weight distributions in the range of 100 to 30 000; it does not apply to water-soluble polymers that interact with the separation material or the mobile phase by reaction, absorption or adsorption.
Clause 2 cites GB/T 6682, whose title the page prints as analytical laboratory use specifications and test methods.
Clause 3, Terms and definitions, defines gel filtration chromatography (GFC) as a liquid chromatographic separation technique that uses water or a buffer solution as the mobile phase and separates the different components of a polymer according to molecular size, defines the molecular weight of a polymer, which may be characterised as a number-average, weight-average, Z-average, viscosity-average or peak molecular weight, and then opens the entry for the number-average molecular weight, Mn.
The draft on the source page is cut off inside that entry, where the formula for Mn is garbled, and it shows nothing of the clauses that follow.
The page gives ICS 71.040.50 and Chinese classification G76, estimates the text at 9,917 words, and records that the standard was proposed by the China Petroleum and Chemical Industry Association and administered by the National Standardization Technical Committee Chemistry (SAC/TC63). It was issued on 3 July 2015 and has applied since 1 February 2016.
Found what you need?
Document preview — GB/T 31816-2015
National Standard of the People's Republic of China
- ICS
- 71.040.50
- Classification
- G 76
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Petroleum and Chemical Industry Association.
1 Scope
This standard specifies the method of gel filtration chromatography (GFC) Determination of molecular weight polymeric water treatment agent and its distribution test condition.
This standard applies to the determination of the relative average molecular weight and molecular weight of the water-soluble polymer water treatment agent DISPERSOR distribution. This standard For the determination of molecular weight distribution in the range of 100 to 30000 polymeric water treatment agent.
This standard does not apply to phase separation material reacts with the flow, absorption, adsorption and other water-soluble polymer interactions.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Gel filtration chromatography (GFC)
Based on the molecular size of the polymer with water or a buffer solution as mobile phase, so that the different components of the polymer can be separated from a liquid chromatography From technology.
3.2 Polymer molecular weight
Structural units and structural units of the molecular weight of the product, the available number average molecular weight, weight average molecular weight, Z-average molecular weight, or viscosity average molecular weight peak Bit molecular weight characterization.
3.3 The number average molecular weight, Mn
Molecular weight according to the statistical average number of molecules.
......
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 31816-2015
- 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 6682-2008 — Water for analytical laboratory use - Specification and test methods
GB/T 10003-2026 — Biaxially oriented polypropylene (BOPP) film
GB/T 10004-2026 — Plastic/Plastic laminated films and pouches for packaging
Secure payment via Stripe
Payments accepted
GB/T 31816-2015
$145.00