GB/T 8314-2013Tea - Determination of free amino acids content (English PDF)
茶 游离氨基酸总量的测定
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 8314-2013 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2013
Implementation date
June 22, 2014
Scope
GB/T 8314-2013 is the English-translated version of 茶 游离氨基酸总量的测定.
GB/T 8314-2013 is the Chinese standard "Tea - Determination of free amino acids content". Its scope clause reads: This standard specifies the apparatus and appliances, reagents and solutions, operating methods and results Determination of free amino acids in tea calculated method.
This standard applies to the determination of total free amino acid in tea. Its clauses include terms and definitions; reagents and solutions.
Found what you need?
Document preview — GB/T 8314-2013
National Standard of the People's Republic of China
- ICS
- 67.140.10
- Classification
- X 04
- Replacing
- GB/T 8314-2002
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 6 Reagents and solutions
1 Scope
This standard specifies the apparatus and appliances, reagents and solutions, operating methods and results Determination of free amino acids in tea calculated method.
This standard applies to the determination of total free amino acid in tea.
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 8302 sampling tea
Sample Preparation and Determination of dry matter content GB/T 8303 Tea grated
GB/T 8312 Determination of caffeine in tea
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Free amino acids
Tea flooding alpha- amino acids having a free state in the physical form.
Principle 4
alpha- amino acid at pH8.0 conditions were hot with ninhydrin to form a purple complex measured by spectrophotometry at a specific wavelength
Its content.
5 apparatus and appliances
5.1 Analysis of balance
a sense of the amount of 0.001g.
5.2
Spectrophotometer.
5.3 colorimetric tube
a plug, 25mL.
6 Reagents and solutions
6.1
Unless otherwise indicated, the methods used were of analytical grade reagents (AR), distilled water.
6.2 pH8.0 phosphate buffer
6.2.1 1/15mol/L disodium hydrogen phosphate
Weigh 23.9g twelve - hydrated disodium hydrogen phosphate (Na2HPO4 · 12H2O), add water to dissolve into
1L volumetric flask, dilute to the mark, shake.
......
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
Similar standards
Editions of GB/T 8314
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 8314-2013 | Tea - Determination of free amino acids content | current edition | Current |
| GB/T 8314-2002 | Tea - Determination of free amino acids content | previous edition | Superseded |
This page sells the current edition, GB/T 8314-2013. Earlier editions are listed for reference only.
How to Download GB/T 8314-2013
- 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 8314-2013
$85.00