GB/T 24223-2009 English PDF

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GB/T 24223-2009: Chromium ores -- Determination of phosphorus content -- Reduced molybdophosphate photometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24223-2009	189	Add to Cart	3 days	Chromium ores -- Determination of phosphorus content -- Reduced molybdophosphate photometric method	Valid

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GB/T 29516   SN/T 2638.3   GB/T 24197   GB/T 24221   GB/T 24222   GB/T 24220   

Basic data

Standard ID: GB/T 24223-2009 (GB/T24223-2009)
Description (Translated English): Chromium ores -- Determination of phosphorus content -- Reduced molybdophosphate photometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D33
Classification of International Standard: 73.060.30
Word Count Estimation: 8,859
Date of Issue: 2009-07-15
Date of Implementation: 2010-04-01
Adopted Standard: ISO 6127-1981, MOD
Regulation (derived from): National Standard Approval Announcement 2009 No.9 (Total No.149)
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 reduction of salt phosphomolybdate spectrophotometric determination of chromium ore phosphorus content. This standard applies to the determination of chromium ore phosphorus content. Determination of the mass fraction range: 0. 002% to 0. 10%, this standard shall comply with the relevant provisions of GB/T 24228 's.

GB/T 24223-2009: Chromium ores -- Determination of phosphorus content -- Reduced molybdophosphate photometric method

---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.
Chromium ores. Determination of phosphorus content. Reduced molybdophosphatge photometric method ICS 73.060.30 D33 National Standards of People's Republic of China Determination of phosphorus content of chrome ore Restore phosphomolybdate salt spectrophotometric method (ISO 6127. 1981, MOD) Posted 2009-07-15 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 6127. 1981 "Determination of phosphorus content reduction of chromium ore phosphomolybdate spectrophotometric" (in English). This standard and ISO 6127. 1981 in comparison, mainly to do the following changes. --- "2 Normative references" in place of national standards with international standards corresponding; --- "7.3.4 measure" will be changed to 50mm cuvette 30mm ~ 50mm cuvette; --- Added "6 sampling and sample preparation"; --- Added "7.1 Determination of times"; --- Added "10 Test Report"; --- Deleted "5.1 colorimeter photoelectric absorption." The standard proposed by China Iron and Steel Association. This standard by the National Standardization Technical Committee of pig iron and ferroalloy. This standard was drafted. Tianjin People's Republic of China Exit Inspection and Quarantine, metallurgical industry Information Standards Institute, Ningbo Inspection and Phytophthora Institute of Science and Technology. The main drafters of this standard. Gu Songhai, Yaozhuan Gang, Wei Hongbing, Li Fengyun, Guo Fen, Wang Hong, Song Yi, Zhang Jianbo. Determination of phosphorus content of chrome ore Restore phosphomolybdate salt spectrophotometric method 4.2 Sodium peroxide (Na2O2), dry powder, does not contain phosphorus. 4.3 mixed flux, take 100g of sodium carbonate (4.1), 50g sodium tetraborate and 1g of sodium nitrite in research or quartz agate mortar to a fine powder. 4.4 hydrochloride, ρ1.19g/mL. ......

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