HOME   Cart(8)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

GB/T 9730-2007 English PDF

US$139.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 9730-2007: Chemical reagent -- General method for the determination of oxalates
Status: Valid

GB/T 9730: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 9730-2007English139 Add to Cart 2 days [Need to translate] Chemical reagent -- General method for the determination of oxalates Valid GB/T 9730-2007
GB/T 9730-1988English199 Add to Cart 2 days [Need to translate] Chemical reagent--General method for the determination of oxalates Obsolete GB/T 9730-1988

PDF similar to GB/T 9730-2007


Standard similar to GB/T 9730-2007

GB/T 9722   GB/T 9724   GB/T 9729   GB/T 9734   GB/T 9733   

Basic data

Standard ID GB/T 9730-2007 (GB/T9730-2007)
Description (Translated English) Chemical reagent -- General method for the determination of oxalates
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G60
Classification of International Standard 71.040.30
Word Count Estimation 5,562
Date of Issue 2007-09-26
Date of Implementation 2008-04-01
Older Standard (superseded by this standard) GB/T 9730-1988
Adopted Standard ISO 6353-1-1982, NEQ
Regulation (derived from) China National Standard Approval Announcement2007 No.11 (Total No.111)
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 standard specifies the azo compounds to convert oxalate into common approach with colorimetric assay. This standard applies to the determination of trace organic reagents oxalate. Spectrophotometric detection range 1��g/mL ~ 20��g/mL (in C2O4 dollars), visual colorimetric detection range of 0. 4 ��g/mL ~ 20��g/mL (in C2O4 dollars).

GB/T 9730-2007: Chemical reagent -- General method for the determination of oxalates

---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.
Chemical reagent. General method for the determination of oxalates ICS 71.040.30 G60 National Standards of People's Republic of China Replacing GB/T 9730-1988 Chemical Reagents General method for determination of oxalate (ISO 6353-1. 1982, Reagentsforchemicalanalysis- Part 1. Generaltestmethods, NEQ) Posted 2007-09-26 2008-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard and ISO 6353-1. 1982 "Reagents for chemical analysis - Part 1. General test method" non-equivalent. This standard replaces GB/T 9730-1988 "General method for determination of chemical reagents oxalates," compared with the GB/T 9730-1988 Cancel 1988 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 was drafted. Sinopharm Chemical Reagent Co., Ltd. The main drafters of this standard. Chenhao Yun, Chen Hong. This standard was first published in 1988. Chemical Reagents General method for determination of oxalate

1 Scope

This standard specifies the oxalate to convert azo compound with the general method of colorimetric determination. This standard applies to the determination of trace organic reagent oxalate. Spectrophotometric detection range of 1μg/mL ~ 20μg/mL (in C2O4 meter), visual colorimetric detection range of 0.4μg/mL ~ 20μg/mL (in C2O4 dollars).

2 Normative references

The 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. 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 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987) GB/T 9721 Chemicals General molecular absorption spectrophotometry (UV and visible part)

3 PRINCIPLE OF THE METHOD

In the medium of hydrochloric acid, oxalic acid with zinc reduced to glyoxylic acid, glyoxylic acid and hydrochloric acid phenylhydrazine reaction of glyoxylic acid phenylhydrazone. Adding an oxidizing agent, The excess phenylhydrazine is converted to a diazonium salt, and then reacted with glyoxylic acid phenylhydrazone, generating azo compounds, pink in an acidic medium, it may be visually Colorimetric or spectrophotometric determination of oxalate.

4 Reagents and materials

Unless otherwise specified in this standard, the standard solution, preparations and products, according to GB/T 602, the provisions of the preparation of GB/T 603, the experimental Water should be consistent with GB/T 6682 in the three water specifications.

5 Instruments

5.1 General laboratory equipment. 5.2 Spectrophotometer shall comply with GB/T 9721's.

6 Determination

6.1 visual colorimetry Sampling according to product standards and test solution preparation. Take 5mL sample solution into 25mL colorimetric tube, add 2mL of hydrochloric acid, 1g arsenic-free Zinc, immediately incubated in a boiling water bath for 1min, standing out 2min, containing 0.25mL immediately poured into a solution of phenylhydrazine hydrochloride (10g/L) ratio of the color Tube (without rendering zinc particles poured), washed three times with water colorimetric tube (using a pipette operation), each 1mL, will be incorporated into the lotion containing phenylhydrazine hydrochloride solution Colorimetric tube (the volume of the solution at this time should not exceed 10mL). Incubated in a boiling water bath for 1min, rapidly cooled in running water, diluted hydrochloric acid To 25mL, plus 0.25mL iron potassium cyanide solution (50g/L), and shake. The solution was pink with the standard comparative colorimetric solution. Preparation of the standard developing solution is a specified amount than the oxalate (C2O4) standard solution, was diluted to 5mL, at the same time with the same volume of the same test solution

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 9730-2007_English be delivered?

Answer: Upon your order, we will start to translate GB/T 9730-2007_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 9730-2007_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 9730-2007_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+ countries

Question 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 [email protected]. 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/T 9730-2007?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 9730-2007 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.