GB 19641-2015 PDF English
US$170.00 · In stock · Download in 9 secondsGB 19641-2015: National food safety standard - Oil seeds Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 19641: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 19641-2015 | English | 170 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
National food safety standard - Oil seeds
| Valid |
| GB 19641-2005 | English | 199 |
Add to Cart
|
2 days
|
Hygienic standard for oil seeds
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 19641-2015
GB 19641-2015: National food safety standard - Oil seeds---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/GB19641-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard - Oil Seeds
Issued on. NOVEMBER 13, 2015
Implemented on. NOVEMBER 13, 2016
Issued by. National Health and Family Planning Commission of the People’s
Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Terms and Definitions... 4
3 Technical Requirements... 4
4 Others... 5
Appendix A Inspection Method for Datura Seeds... 6
Appendix B Inspection Method for Ergot... 9
Bibliography... 11
Foreword
This Standard serves as a replacement of GB 19641-2005 Hygienic Standard for Oil Seeds.
In comparison with GB 19641-2005, the main changes are as follows.
---The title of the Standard is modified into “National Food Safety Standard - Oil Seeds”;
---Sensory requirements are modified;
---Physical and chemical indicators are modified;
---Appendixes are added.
National Food Safety Standard - Oil Seeds
1 Scope
This document is applicable to oil seeds for making edible vegetable oil.
2 Terms and Definitions
2.1 Moldy Kernels
Moldy kernels refer to kernels whose surface is obviously moldy and damages the embryo,
endosperm or cotyledon, and has no edible value.
3 Technical Requirements
3.1 Sensory Requirements
The sensory requirements shall comply with the stipulations of Table 1.
3.3 Limits of Contaminants and Fungi Toxins
3.4 Limits of Pesticides Residue
The limits of pesticides residue shall comply with the stipulations of GB 2763.
4 Others
The marking of genetically modified edible vegetable oils shall comply with the relevant
national stipulations.
Appendix A
Inspection Method for Datura Seeds
A.1 Identification
A.1.1 Morphological characteristics
Datura seeds are circular, rectangular, reniform, triangular reniform, elliptical broad ovoid, 3
mm ~ 5 mm long, 2.5 mm ~ 4.0 mm wide, flat on both sides, relatively thick or thick on the
back, smooth edges or with wavy ridges. Seed is leathery, light yellow, yellowish brown, tan to
dark brown; the surface is slightly wrinkled, or slightly (obviously) concave, with (or without)
coarse texture and dimples. The hilum is long triangular, regular triangular or T-shaped,
sometimes, its surface is often covered with residual white suspensor. The seeds contain
abundant white endosperm, and the embryos are mostly annular or curved, and rarely straight.
A.1.2 Identification
Those that comply with the above description of morphological characteristics in A.1.1 can be
identified as the datura.
A.2 Alkaloid Colorimetric Characterization
A.2.1 Principle
Atropine and other alkaloids contained in the specimen have a chromogenic reaction with
fuming nitric acid and potassium hydroxide solution after extraction.
A.2.2 Reagents
A.2.3 Analytical procedures
Put about 30 datura seeds into a mortar, add ammonia water (1 + 1) to soak them for a while,
then, grind them into a viscous shape; add diethyl ether and grind it for three times, 10 mL each
time; combine the diethyl ether in a separatory funnel, add 10 mL of hydrochloric acid (1 + 5),
shake and extract it for 1 min, then, separate the hydrochloric acid layer into another separatory
funnel. Add ammonia water (1 + 1) to make it alkaline and use 10 mL of chloroform to shake
and extract it for 1 min, then, extract again, combine the chloroform layer; through anhydrous
sodium sulfate, dehydrate it and concentrate to 0.5 mL; reserve it for later use.
A.3 Thin Layer Chromatographic Characterization
A.3.1 Principle
After atropine and other alkaloids contained in the specimen are extracted, use thin layer to
separate it, then, use a color developing agent to perform color development and compare it
with the reference standard.
A.3.2 Reagents
A.3.2.1 Silica gel G thin-layer plate. thickness 0.3 mm ~ 0.5 mm, activate at 105 C for 1 h,
then, put in a desiccator and reserve it for later use.
A.3.2.2 Developing solvent. methanol - ammonia water (200 + 3).
A.3.3 Analytical procedures
At 2 cm from the lower end of the thin-layer plate, spot 10 L of standard solutions of atropine
and scopolamine, 30 L ~ 100 L of specimen extraction concentrate, with a distance of 1.5
cm between each spot. Place it in a developing tank saturated with developing solvent in
advance, and wait until the front of the solvent reaches 10 cm ~ 15 cm, then, take it out and
evaporate the developing agent; spray the color developing agent to manifest orange-red spots,
which is a positive reaction.
Appendix B
Inspection Method for Ergot
B.1 Identification
B.1.1 Morphological characteristics
Ergot is elongated or banana-shaped, sometimes slightly flat, 3 mm ~ 10 mm long, 1 mm ~ 7
mm thick, black or purple-black on the outside, with longitudinal grooves and transverse cracks,
brittle, easy to break, flat cross-section, blunt polygonal or oval, and the center is white, off-
white or pinkish-white. After dormancy, sclerotium germinates to generate stroma; infertile
stromata stalks are slender, with an oblate spherical head, 1 mm ~ 2 mm in diameter, reddish
brown and with perithecium grown on the outer edge.
B.2 Sclerethryrin and Ergot Alkaloids Characterization
B.2.1 Reagents
B.2.1.1 Tartaric acid solution (20 g/L).
B.2.1.2 Anhydrous ether.
B.2.1.6 Para-dimethylaminobenzaldehyde solution. weigh-take 0.125 g of para-
dimethylaminobenzaldehyde, add 100 mL of diluted sulfuric acid (slowly pour 65 mL of
sulfuric acid into 35 mL of water, mix it well and cool it) to dissolve it, then, add 0.1 mL of
ferric chloride solution (50 g/L) and mix it well.
B.2.1.7 Absolute ethanol. there is no fluorescence when observed under the ultraviolet light
with a wavelength of 365 nm.
B.2.2 Analytical procedures
Take 20 suspected ergots in a mortar, grind them and add tartaric acid solution (20 g/L) to grind
into a viscous shape; add diethyl ether and carefully grind for three times, 10 mL each time;
incorporate the diethyl ether layer in a test tube, and keep the residue in the mortar. Add 0.5 mL
of saturated sodium bicarbonate solution to the test tube, shake it, and the sodium bicarbonate
solution layer turns red, which means that sclerethryrin is detected.
B.3 Calculation Formula
Weigh 1,000 g (m1) of sample, after ergot is detected, weigh it (m2), accurate to 1 g. The content
of ergot (w), which is expressed in mass fraction (%), shall be calculated in accordance with
Formula (B.1).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB 19641-2015 be delivered?Answer: The full copy PDF of English version of GB 19641-2015 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 19641-2015_English with my colleagues?Answer: Yes. The purchased PDF of GB 19641-2015_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+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB 19641-2015 -- 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 19641-2015?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 19641-2015 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 19641-2015?A step-by-step guide to download PDF of GB 19641-2015_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 19641-2015".
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
|