GB 12596-2008 English PDFUS$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 12596-2008: Working chemical -- Calcium carbonate Status: Valid GB 12596: Historical versions
Basic dataStandard ID: GB 12596-2008 (GB12596-2008)Description (Translated English): Working chemical -- Calcium carbonate Sector / Industry: National Standard Classification of Chinese Standard: G61 Classification of International Standard: 71.040.30 Word Count Estimation: 7,751 Date of Issue: 2008-06-18 Date of Implementation: 2009-06-01 Older Standard (superseded by this standard): GB 12596-1990 Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This Chinese standard specifies the Working chemical properties of calcium carbonate, specifications, testing, inspection and marking and packaging rules. This standard applies to Working chemical titration analysis of calcium carbonate test. GB 12596-2008: Working chemical -- Calcium carbonate---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Working chemical.Calcium carbonate ICS 71.040.30 G61 National Standards of People's Republic of China Replacing GB 12596-1990 Calcium carbonate work benchmark reagents Posted 2008-06-18 2009-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThe standard Chapter 4, Section 5.3.1,5.3.2 article are mandatory, other provisions are recommended. This standard replaces GB 12596-1990 "job reference reagent (capacity) of calcium carbonate," major changes compared with the GB 12596-1990 as follows. --- Standard name to "work reference reagent calcium carbonate"; --- Modify the Content Measurement (1990 version 4.1, this version 5.3); --- Abolition of the "standard solution formulated Appendix A (Supplement)" (1990 edition Appendix A). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Chemistry Chemicals Branch (SAC/TC63/SC3) centralized. This standard is drafted by. Beijing Institute of chemical reagents. The main drafters of this standard. Han Baoying, strong Jing Lin. This standard replaces the standards previously issued as follows. --- GB 12596-1977, GB 12596-1990. Calcium carbonate work benchmark reagents Molecular formula. CaCO3 Molecular weight. 100.09 (according to 2005 international relative atomic mass).1 ScopeThis standard specifies the calcium carbonate work benchmark reagents traits, specifications, testing, packaging and inspection rules and signs. This standard applies to titration analysis of calcium carbonate work benchmark test reagent.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Preparation of GB/T 601 chemical reagent standard titration solution GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982, NEQ) GB/T 609 chemical reagent - General method for determination of total nitrogen (GB/T 609-2006, ISO 6353-1. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 9723-2007 Chemicals flame atomic absorption spectrometry General GB/T 9728 General method for determination of chemical reagents sulfate (GB/T 9728-2007, ISO 6353-1. 1982, NEQ) GB/T 9729 General method for determination of chloride Chemicals (GB/T 9729-2007, ISO 6353-1. 1982, NEQ) GB/T 9739 General method for determination of iron chemical reagents (GB/T 9739-2006, ISO 6353-1. 1982, NEQ) GB 10738 Job reference reagent titration Determination General Weighing GB 15346 chemical reagent packaging and marking HG/T 3484 standard chemical reagents glass emulsion and clarity standards HG/T 3921 Chemicals sampling and acceptance rules3 CharactersThis reagent is white powder, insoluble in water.4 SpecificationCalcium carbonate as shown in Table 1. Table 1 Name reference work Content (CaCO3) /% 99.95 ~ 100.05 Clarity test, number ≤5 Loss on drying //% ≤0.2 Table 1 (continued) Name reference work Alkalinity (OH- meter)/mmol/g ≤0.0025 Chloride (Cl) //% ≤0.001 Sulphate (SO4) //% ≤0.01 Total nitrogen (N) //% ≤0.01 Magnesium (Mg) //% ≤0.02 Iron (Fe) //% ≤0.001 Heavy Metals (as Pb) //% ≤0.0015 Test5.1 Warning Reagents used in this test method are toxic or corrosive, some of the testing process can lead to dangerous situations, the operator should take Appropriate safety and health practices. 5.2 General Provisions Unless specified otherwise in this chapter, the use of standard titration solution, standard solution, preparations and products, according to GB/T 601, GB/T 602, Regulations preparation, test water should be consistent with GB/T 6682 specifications in three water samples according to precise weighing 0.01g, the use of GB/T 603's Solution "%" are represented by the mass fraction. 5.3 Content Measured according to GB 10738 requirements. 5.3.1 disodium EDTA standard titration solution of calcium carbonate titration Standards Weigh 0.15g at 110 ℃ ± 2 ℃ drying to constant standard substance calcium carbonate, accurate to 0.00001g, placed in a reaction flask, add 0.6mL hydrochloric acid solution (20%) was dissolved, add 100mL of water, titrated with a solution of disodium ethylenediaminetetraacetate standard [Ba (EDTA) = 0.05mol/L] titration. Near the end, add 5mL edetate disodium magnesium solution [Ba (EDTA-Mg) = 0.01mol/L], 10mL ammonia - ammonium chloride buffer solution A (pH = 10) and 3 drops of chrome black T indicator solution (5g/L), continue titration until the solution changed from purple to pure blue color. Weighing disodium EDTA standard titration solution, accurate to 0.0001g. Determination 5.3.2 Content 5.3.1 Determination of the same, with the measurement sample instead of the standard material loss after drying. Calcium carbonate content and its value is "%" means, according to equation (1). (1) Where. B --- material content standard calcium carbonate (mass fraction), the value to "%" means; 5.4 Clarity test 10g samples were weighed, dissolved in 10mL water and 45mL of hydrochloric acid solution (20%), diluted to 100mL. Turbidity shall not exceed Clarity Standard No. 5 HG/T 3484 stipulated. 5.5 Loss on drying Weigh 2g sample, accurate to 0.0001g, has been placed at 110 ℃ ± 2 ℃ constant weighing bottle at 110 ℃ ± 2 ℃ electric bake Oven dried to constant weight. Samples retained after constant for determination. Loss on drying 1, the value in the "%" means, according to equation (2). 100 (2) Where. 5.6 alkalinity 3g Weigh sample plus 30mL of carbon dioxide-free water, warm, shake for 10min, cooled and filtered. Take 20mL filtrate, add 2 drops Phenolphthalein indicator solution (10g/L), as the filtrate is red, with a hydrochloric acid standard titration solution [Ba (HCl) = 0.1mol/L] titrated to a colorless solution. Alkalinity values in "mmol/g" represents, according to equation (3) Calculated. (3) Where. Value Vp --- hydrochloric acid standard titration solution volume in milliliters (mL); Ba --- hydrochloric acid standard titration solution concentration value in units of moles per liter (mol/L); 5.7 Chloride Weigh 1g sample was dissolved in 10mL 6mL water and nitric acid solution (25%) diluted to 20mL, according to the provisions of GB/T 9729 measured set. The turbidity of the solution was not greater than the standard turbidity solution. Standard preparation turbid solution is to take the ratio of 0.01mg containing chloride (Cl) standard solution was diluted to 20mL, and at the same time with the same volume of test solution Sample processing. 5.8 sulfate Weigh 0.5g sample, add 5mL water was added dropwise a solution of hydrochloric acid (20%) to dissolve the sample, diluted to 100mL, take 20mL, press The provisions of GB/T 9728 Determination. The turbidity of the solution was not greater than the standard turbidity solution. Standard preparation turbid solution is to take the ratio of 0.01mg containing sulfate (SO4) standard solution was diluted to 20mL, at the same time with the same volume of test solution The same treatment. 5.9 total nitrogen content Weigh 1g sample, add 5mL water was added dropwise a solution of hydrochloric acid (20%) to dissolve the sample, diluted to 140mL, according to GB/T 609 requirements Determination. The yellow solution can not be deeper than the standard colorimetric solution. Preparation of the standard developing solution containing 0.10mg ratio is taken of nitrogen (N) standard solution was diluted to 140mL, and at the same time with the same volume of test solution deal with. 5.10 Magnesium Determined according to the provisions of GB/T 9723-2007 of. 5.10.1 Instrument Conditions Source. magnesium hollow cathode lamp; Wavelength. 285.2nm; Flame. acetylene - air. 5.10.2 Determination Weigh 0.5g sample, add 5mL water was added dropwise a solution of hydrochloric acid (20%) to dissolve the sample, diluted to 100mL. Take 4mL, a total of four. According to the provisions of GB/T 9723-2007 7.2.2 measurement results calculated according to the provisions of 7.2.3. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 12596-2008_English be delivered?Answer: Upon your order, we will start to translate GB 12596-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 12596-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB 12596-2008_English will be deemed to be sold to your employer/organization who actually pays 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. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB 12596-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 12596-2008 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. |
