GB/T 13083-2018 PDF English
US$85.00 · In stock · Download in 9 secondsGB/T 13083-2018: Determination of fluorine in feeds -- Ion selective electrode method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 13083: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 13083-2018 | English | 85 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Determination of fluorine in feeds -- Ion selective electrode method
| Valid |
| GB/T 13083-2002 | English | 239 |
Add to Cart
|
3 days
|
Determination of fluorine in feed -- Ion selective electrode method
| Obsolete |
| GB/T 13083-1991 | English | 199 |
Add to Cart
|
2 days
|
Method for determination of fluorine in feeds
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 13083-2018
GB/T 13083-2018: Determination of fluorine in feeds -- Ion selective electrode method---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/GBT13083-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120
B 46
Replacing GB/T 13083-2002
Determination of Fluorine in Feeds -
Ion Selective Electrode Method
Issued on. MAY 14, 2018
Implemented on. DECEMBER 01, 2018
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Principle... 4
4 Reagents and Materials... 5
5 Apparatus... 6
6 Sample Preparation... 6
7 Test Procedures... 6
8 Test Data Processing... 8
9 Precision... 8
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 13083-2002 Determination of Fluorine in Feed – Ion
Selective Electrode Method; compared with GB/T 13083-2002, this Standard has the
major technical changes as follows besides the editorial modifications.
--- Expand the scope of the standard “this Standard is applicable to feed, feed
ingredients, phosphate and mixed feed additive with aluminosilicate as carrier”;
--- Modify the detection limit of the method;
--- Modify the description of the principle;
--- Modify the measurement range of acidity meter and fluoride ion selective
electrode;
--- Increase the preparation method of stone powder sample of feed ingredients;
--- Increase the preparation method of mixed feed additive sample with
aluminosilicate as carrier;
--- The result shall be expressed from 0.1mg/kg to 1mg/kg.
This Standard was proposed by and under the jurisdiction of National Technical
Committee for Standardization of Feed Industry (SAC/TC 76).
Drafting organization of this Standard. Zhejiang Province Institute of Veterinary Drug
and Feedstuff.
Chief drafting staffs of this Standard. Ren Yuqin, Huang Juan, Zhang Zhijian, Zhu
Congying, Yuan Lu, Zhang Xiaoli, Qiu Chengjun, and Shang Xiaojin.
The historical editions replaced by this Standard are as follows.
--- GB/T 13083-1991, GB/T 13083-2002.
Determination of Fluorine in Feeds -
Ion Selective Electrode Method
1 Scope
This Standard specifies using ion selective electrode method to determine the fluorine
in the feeds.
This Standard is applicable to the feed, feed ingredients, phosphate and mixed feed
additive with aluminosilicate as carrier.
The detection limit of this method is 3mg/kg (take 1g of sample, make constant volume
to 50mL).
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 6682 Water for Analytical Laboratory Use – Specification and Test Methods
GB/T 14699.1 Feeding Stuffs – Sampling
GB/T 20195 Animal Feeding Stuffs – Preparation of Test Samples
3 Principle
The sample is extracted by hydrochloric acid solution; use total ionic strength buffer
solution to adjust the pH to be 5~6; eliminate the acidity and the ion interference such
as Al3+, Fe3+, Ca2+, Mg2+, and SiO32- that can form complexes with fluoride ion; then use
ion meter to measure the potential difference between the fluoride ion selective
electrode and the saturated calomel electrode; such potential difference is linear with
the logarithm of the fluoride ion activity (concentration) in the solution;
4 Reagents and Materials
Unless otherwise stated, the reagents used in this method shall be analytical reagent;
water shall be Class-III water specified in GB/T 6682.
4.1 Hydrochloric acid.
4.2 Sodium acetate solution (3mol/L). take 204g of sodium acetate trihydrate; add
about 300mL of water; adjust the pH to be 7.0 by acetic acid solution (1→10); transfer
into a 500mL volumetric flask; add water to the scale.
4.6 NaOH solution (15mol/L). take 60g of sodium hydroxide; add water to dissolve into
100mL.
4.7 Fluorine standard solution.
5 Apparatus
5.1 Analytical balance. sensitivity of 0.0001g.
5.2 Ion meter. measuring range of 0.0mV~±1800mV; or its equivalent pH meter or
potentiometer.
5.3 Fluoride ion electrode. measuring range of 10-1 mol/L ~ 10-6 mol/L; pF-1 type or its
equivalent composite electrode.
5.7 Magnetic stirrer.
5.8 Ultrasonic extractor.
5.9 Nickel crucible or platinum crucible.
6 Sample Preparation
Take representative sample according to the provisions of GB/T 14699.1; take about
250g of reduced sample by quadruple method; prepare the sample as per the provision
of GB/T 20195;
7 Test Procedures
7.1 Preparation of fluorine standard series
Accurately pipette 0.5mL, 1.00mL, 2.00mL, 5.00mL, 10.00mL of fluorine standard
working solution II [4.7c)] and 2.00mL, 5.00mL of fluorine standard working solution I
[4.7b)]; separately place them into 50mL volumetric flasks; separately add 5.0mL of
hydrochloric acid solution (4.5), 25mL of total ionic strength buffer solution (4.4); add
water to the scale; mix evenly. The concentrations of the above standard series are
0.1µg/mL, 0.2µg/mL, 0.4µg/mL, 1.0µg/mL, 2.0µg/mL, 4.0µg/mL, 10.0µg/mL.
7.2 Preparation of sample solution
7.2.1 Preparation of feeds and feed ingredients (except for the three types listed
in 7.2.2, 7.2.3 and 7.2.4) sample solutions
7.2.3 Preparation of stone powder sample solution
Take about 0.5g~1g (accurate to 0.0001) of sample; place into a 50mL volumetric flask;
slowly add 20mL (prevent the reaction is too violent and spill) of hydrochloric acid
solution (4.5); extract for 1h (slightly shake the volumetric flask from time to time to
avoid the sample sticking to the flask wall); or perform ultrasonic extraction for 20min;
after extraction, add 25mL of total ionic strength buffer solution (4.4); add water to the
scale; mix evenly; filter by filter paper.
7.2.4 Preparation of mixed feed additive sample solution with aluminosilicate as
carrier
7.3 Measurement
Connect the fluoride ion selective electrode and saturated calomel electrode with the
negative and positive ends of the ion meter. Insert the electrode into a polyethylene
plastic cup containing 50mL of water; preheat the instrument; stir at a constant speed
on the magnetic stirring function; replace the water for twice or three times; after the
potential is stable, the potential can be measured.
8 Test Data Processing
The fluorine content in the sample, X, shall be calculated as per the Formula (1), in
mg/kg.
9 Precision
In the same laboratory, two independent test results are obtained by the same operator
using the same equipment and the same measurement method against the same test
object within a short time. when the fluorine content in the sample is less than or equal
to 50mg/kg, the absolute difference shall be no more than 20% of the arithmetic mean
of the two measured values; when the fluorine content in the sample is greater than
50mg/kg, the absolute difference shall be no more than 10% of the arithmetic mean of
the two measured values.
......
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/T 13083-2018 be delivered?Answer: The full copy PDF of English version of GB/T 13083-2018 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 13083-2018_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 13083-2018_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/T 13083-2018 -- 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 13083-2018?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 13083-2018 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 13083-2018?A step-by-step guide to download PDF of GB/T 13083-2018_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 13083-2018".
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
|