GB/T 8647.9-2006 PDF English

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GB/T 8647.9-2006: The methods for chemical analysis of nickel -- Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion
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GB/T 8647.9: Historical versions

Standard ID	USD	BUY PDF	Delivery	Standard Title (Description)	Status
GB/T 8647.9-2006	130	Add to Cart	Auto, 9 seconds.	The methods for chemical analysis of nickel -- Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion	Valid
GB/T 8647.9-1988	199	Add to Cart	2 days	Nickel--Determination of sulphur content--Infra-red absorption method after high frequency induction furnace combustion	Obsolete

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GB/T 8647.9-2006: The methods for chemical analysis of nickel -- Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.040.30 H 13 Replacing GB/T 8647.10-1988 The methods for chemical analysis of nickel - Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion (ISO 7524:1985, Nickel, ferronickel and nickel alloys -- Determination of carbon content -- Infra-red absorption method induction furnace combustion, NEQ) ISSUED ON: SEPTEMBER 26, 2006 IMPLEMENTED ON: FEBRUARY 01, 2007 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword ... 3 1 Scope ... 5 2 Method summary ... 5 3 Reagents ... 5 4 Instruments ... 6 5 Analysis steps ... 6 6 Precision ... 7 7 Quality assurance and control ... 8

Foreword

GB/T 8647 "The methods for chemical analysis of nickel" is divided into the following 10 parts: GB/T 8647.1, The methods for chemical analysis of nickel -- Determination of iron content -- Sulfosalicylic acid spectrophotometric method GB/T 8647.2, The methods for chemical analysis of nickel -- Determination of aluminium content -- Electrothermal atomic absorption spectrometric method GB/T 8647.3, The methods for chemical analysis of nickel -- Determination of silicon content -- Molybdenum blue spectrophotometric method GB/T 8647.4, The methods for chemical analysis of nickel -- Determination of phosphorous content -- Molybdenum blue spectrophotometric method GB/T 8647.5, The methods for chemical analysis of nickel -- Determination of magnesium content -- Flame atomic absorption spectrometric method GB/T 8647.6, The methods for chemical analysis of nickel -- Determination of cadmium, cobalt, copper, manganese, lead and zinc contents -- Flame atomic absorption spectrometric method GB/T 8647.7, The methods for chemical analysis of nickel -- Determination of arsenic antimony bismuth tin and lead contents -- Electrothermal atomic absorption spectrometric method GB/T 8647.8, The methods for chemical analysis of nickel -- Determination of sulphur content -- Infra-red absorption method after high frequency induction furnace combustion GB/T 8647.9, The methods for chemical analysis of nickel -- Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion GB/T 8647.10, The methods for chemical analysis of nickel -- Determination of arsenic cadmium lead zinc antimony bismuth tin cobalt copper manganese magnesium silicon aluminium iron contents -- Atomic emission spectrometric method This is Part 9. This Part is not equivalent to ISO 7524:1985 "Nickel, ferronickel and nickel alloys -- Determination of carbon content -- Infra-red absorption method induction furnace combustion". The methods for chemical analysis of nickel - Determination of carbon content -- Infra-red absorption method after high frequency induction furnace combustion

1 Scope

This Part specifies the method for the determination of carbon content in nickel. This Part is applicable to the determination of carbon content in nickel. Determination range: 0.0020%~0.20%.

2 Method summary

In the presence of flux, oxygen flow is introduced into the high-frequency induction furnace. The test material is burned at high temperature. Carbon generates carbon dioxide gas and enters the infrared absorption cell. The instrument automatically measures its absorption of infrared energy, calculates and displays the result.

3 Reagents

3.1 Anhydrous magnesium perchlorate [Mg(ClO4)2]. 3.2 Caustic soda asbestos. 3.3 Glass wool. 3.4 Cotton wool. 3.5 Platinum-coated silicone. 3.6 Flux: low sulfur tungsten, tin, iron: W+Sn+Fe (1 g+0.2 g~0.25 g+0.2 g). 3.7 Crucible Ceramic crucible (Φ24 mm×24 mm). Before use, it should be burned in a furnace with air or oxygen at a temperature greater than 1100°C for 1 h~1.5 h. Take it out and place it in a non-oiled desiccator to cool it for use (valid for two days). 3.8 Standard steel sample: carbon content is 0.002%~0.3%. 3.9 Standard steel sample or pure iron sample: carbon content is about 0.002%. standard steel sample is stable within the error range. NOTE: When selecting a standard steel sample, the carbon content should be greater than the carbon content of the specimen being tested. 5.4 Calibration blanks 5.4.1 Weigh 1.000 g of low carbon standard steel sample (3.9) and place it in a crucible (3.7). Add flux (3.6). 5.4.2 Place the crucible on the support of the furnace. Raise it to the burning position. Follow the "automatic" blank calibration steps in the instrument manual. Repeat for 3 to 5 steel samples to obtain an average result with good reproducibility. The mass fraction of carbon in the standard steel sample is deducted by "automatic" blank correction. The value is expressed in %. The blank value obtained is stored in the computer. (When the carbon content of the sample is > 0.001%, the blank value should be < 0.0005%. When the carbon content of the sample is > 0.1%, 5.4 is omitted) 5.4.3 After the blank value is determined, repeat the test of the standard steel sample according to (5.3). The test result should be stable within the error range. Then select a standard sample with the same carbon content as the sample being tested for retest. 5.5 Determination 5.5.1 Weigh 1.000 g of specimen and place it in a crucible (3.7). Add flux (3.6). 5.5.2 Place the crucible on the support of the furnace. Raise it to the combustion position. Follow the "automatic" analysis steps in the instrument manual. The instrument automatically deducts the blank value and displays and prints the mass fraction of carbon. The value is expressed in %.

6 Precision

6.1 Repeatability limit For the determination values of two independent test results obtained under repeatability conditions, the absolute difference between the two test results does not exceed the repeatability limit (r) within the range of the average values given below. The case where the repeatability limit (r) is exceeded does not exceed 5%. The intra- laboratory repeatability is listed in Table 2. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.

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