Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

GB/T 14455.6-2008 PDF English

US$105.00 · In stock · Download in 9 seconds
GB/T 14455.6-2008: Fragrance/Flavor substances -- Determination of ester value or ester content
Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Status: Valid

GB/T 14455.6: Historical versions

Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
GB/T 14455.6-2008105 Add to Cart Auto, 9 seconds. Fragrance/Flavor substances -- Determination of ester value or ester content Valid
GB/T 14455.6-1993199 Add to Cart 2 days Essential oils. Determination of ester value Obsolete

Similar standards

GB/T 14455.5   GB/T 14455.3   GB/T 14454.7   GB/T 14455.1   

GB/T 14455.6-2008: Fragrance/Flavor substances -- Determination of ester value or ester content

---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/GBT14455.6-2008
NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.100.60 Y 41 Replacing GB/T 14455.6-1993, GB/T 14457.5-1993 Fragrance/Flavor substances - Determination of ester value or ester content (ISO 709:2001, Essential oils - Determination of ester value, MOD) ISSUED ON: JULY 15, 2008 IMPLEMENTED ON: NOVEMBER 01, 2008 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China.

Table of Contents

Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 5 4 Principle ... 6 5 Reagents ... 6 6 Instruments ... 6 7 Sample preparation ... 7 8 Operating procedures ... 7 9 Expression of results ... 8 10 Test report ... 9

Foreword

GB/T 14455, Fragrance/Flavor substances, consists of the following parts: -- Part 1: Essential oils - Principles of nomenclature; -- Part 3: Fragrance/Flavor substances - Evaluation of solubility (miscibility) in ethanol -- Part 5: Fragrance/Flavor substances - Determination of acid value or acid content; -- Part 6: Fragrance/Flavor substances - Determination of ester value or ester content; -- Part 7: Fragrance/Flavor substances - Determination of ester value after acetylation and evaluation of free alcohols and total alcohols content. This Part is Part 6 of GB/T 14455. This Part modifies and adopts ISO 709:2001, “Essential oils - Determination of ester value”. Compared with ISO 709:2001, the main technical differences are as follows: -- Add the determination method and calculation formula of the ester content of isolate and synthetic fragrance; -- Delete the sampling method and appendix A of ISO 709: 2001. This Part is the combination and revision of GB/T 14455.6-1993, "Essential oils - Determination of ester value" and GB/T 14457.5-1993 "Isolate and synthetic aroma chemicals - Determination of ester content". Compared with GB/T 14455.6-1993 and GB/T 14457.5-1993, the main changes in this Part are as follows: -- Add the use of potentiometer to judge the end point; -- Add sample preparation; -- Add relevant contents of the test report. This Part was proposed by China National Light Industry Council. This Part shall be under the jurisdiction of National Technical Committee 257 on Fragrance and Flavor Cosmetic of Standardization Administration of China. Fragrance/Flavor substances - Determination of ester value or ester content

1 Scope

This Part of GB/T 14455 specifies the method for determining ester value or ester content of fragrance/flavor substances. This Part applies to the determination of ester content of single esters AND ester value of essential oils in isolate and synthetic fragrance. This Part does not apply to the determination of the ester content of mixed esters and esters that are difficult to be saponified, and the ester value of essential oils that contain lactones or more aldehydes.

2 Normative references

The terms in the following documents become the terms of this Part by reference to this Part of GB/T 14455. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this Part. However, parties to agreements that are based on this Part are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this Part. GB/T 14454.1, Fragrance/Flavor substances - Preparation of test samples (GB/T 14454.1-2008, ISO 356:1996, MOD) GB/T 14454.14, Fragrance/Flavor substances - Preparation of standard solution, test solution and indicator solution GB/T 14455.5, Fragrance/Flavor substances - Determination of acid value or acid content (GB/T 14455.5-2008, ISO 1242:1999, MOD)

3 Terms and definitions

The following terms and definitions are applicable to this Part of GB/T 14455. 3.1 Ester value 6.4 Pipette, whose capacity is 25 mL. 6.5 Boiling water bath. 6.6 Analytical balance. 6.7 Potentiometer.

7 Sample preparation

In accordance with the provisions of GB/T 14454.1.

8 Operating procedures

8.1 Sample Weigh about 2 g of essential oil or an appropriate amount of isolate and synthetic fragrance (accurate to 0.0002 g). If the sample size is different from the above, it is specified in the relevant fragrance product standard. 8.2 Blank test Use the same reagent as sample measurement (8.3) at the same time under the same conditions; see 8.3.3. 8.3 Determination 8.3.1 Put the sample (8.1) into the saponification bottle (6.1). Use a pipette (6.4) to add 25 mL of potassium hydroxide ethanol solution (5.2) and some pumice or porcelain pieces. For fragrance of a high ester value, increase the amount of potassium hydroxide ethanol solution (5.2), so that V0-V1 (see Chapter 9) is at least 10 mL. For fragrance of a low ester value, increase the sample volume. Connect the air condenser; place the saponification bottle in the boiling water bath (6.5), to reflux for 1h (or reflux at the time that is specified in the relevant fragrance product standard). Cool down; remove the air condenser. Add 20 mL of water and 5 drops of phenolphthalein indicator solution or phenol red indicator solution (5.4) (if the fragrance contains components with phenol groups). Where: Mr -- the relative molecular mass that is usually used to indicate the specified ester; EV -- the ester value that is calculated by Formula (1). When the ester value is less than 100, retain two significant digits; when the ester value is equal to or greater than 100, retain three significant digits. 9.1.2 Ester value after determination of acid value When the sample is determined in a solution that has been determined for the acid value, calculate the ester value EV according to Formula (3): Where: V’1 -- the volume of hydrochloric acid standard solution (5.3) that is consumed in the new determination process, in milliliters (mL). 9.2 Ester content 9.2.1 Calculate ester content E according to Formula (4); express in %: Retain the result to one decimal place. 9.2.2 Allowable difference of parallel test results: ester value below 10 is 0.2; ester content below 10% is 0.2%; ester value at 10 ~ 100 is 0.5; ester content above 10% is 0.5%; ester value above 100 is 1.0.

10 Test report

The test report shall include: -- the used test method; -- the obtained test result; -- the finally-obtained result, if repeatability has been verified. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Image 1     Image 2     Image 3     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of English version of GB/T 14455.6-2008 be delivered?Answer: The full copy PDF of English version of GB/T 14455.6-2008 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 14455.6-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 14455.6-2008_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 14455.6-2008 -- 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.

Question 5: Should I purchase the latest version GB/T 14455.6-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 14455.6-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

How to buy and download a true PDF of English version of GB/T 14455.6-2008?

A step-by-step guide to download PDF of GB/T 14455.6-2008_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 14455.6-2008".
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