SN/T 0838.1-2015 English PDF

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SN/T 0838.1-2015: Determination of chromium in boric acid and borax for import and export. Flame atomic absorption spectrometry
Status: Valid

SN/T 0838.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0838.1-2015	139	Add to Cart	3 days	Determination of chromium in boric acid and borax for import and export. Flame atomic absorption spectrometry	Valid
SN/T 0838.1-1999	239	Add to Cart	2 days	Boric acid and borax for export. Determination of chromium content	Obsolete

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GB/T 337.2   GB/T 534   GB/T 210.2   SN/T 0838.3   SN/T 0838.4   SN/T 0838.2   

Basic data

Standard ID: SN/T 0838.1-2015 (SN/T0838.1-2015)
Description (Translated English): Determination of chromium in boric acid and borax for import and export. Flame atomic absorption spectrometry
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: G11
Classification of International Standard: 71.040.30
Word Count Estimation: 6,635
Date of Issue: 2015-05-26
Date of Implementation: 2016-01-01
Older Standard (superseded by this standard): SN/T 0838.1-1999
Quoted Standard: GB/T 6682
Regulation (derived from): State Quality-Inspection-accreditation [2015] No.224
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the flame atomic absorption spectrophotometry chromium content of boric acid and borax method. This standard applies to the determination of the import and export of boric acid and borax in chromium content, measured in the range of 0.40 mg/kg ~ 75.00 mg/kg.

SN/T 0838.1-2015: Determination of chromium in boric acid and borax for import and export. Flame atomic absorption spectrometry

---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.
Determination of chromium in boric acid and borax for import and export.Flame atomic absorption spectrometry People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Replace SN/T 0838.1-1999 Method for determination of chromium content in boric acid and borax Flame atomic absorption spectrophotometry Released on.2015-05-26 2016-01-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

SN/T 0838 is divided into 5 parts. --- SN/T 0838.2-2015 Determination of cobalt content in boric acid and borax - Atomic absorption spectrophotometric method; --- SN/T 0838.3-2015 Determination of nickel content in boric acid and borax - Atomic absorption spectrophotometric method; --- SN/T 0838.4-2015 Determination of manganese content in boric acid and borax - Atomic absorption spectrophotometric method; --- SN/T 0838.5-2015 Determination of copper content in boric acid and borax - Atomic absorption spectrophotometric method. This part is the first part of SN/T 0838. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces SN/T 0838.1-1999 "Determination of the content of boric acid and borax chromium". This part and SN/T 0838.1- Compared with.1999, the main technical changes are as follows. --- Increased flame atomic absorption spectrophotometry; --- Removed the standard for sampling in the normative references; --- Removed the "3.4 Sampling" section. This part is proposed and managed by the National Certification and Accreditation Administration. This section drafted by. Jilin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this section. Lu Chunmei, Meng Rizeng, Ding Xu, Han Dachuan, Yang Lan, Zhang Daihui, Zhang Xun, Zhao Yuhui. The previous versions of the standards replaced by this section are. ---SN/T 0838.1-1999. Method for determination of chromium content in boric acid and borax Flame atomic absorption spectrophotometry

1 Scope

This part of SN/T 0838 specifies a method for the determination of chromium in boric acid and borax by flame atomic absorption spectrophotometry. This section applies to the determination of chromium content in the import and export of boric acid and borax, the measurement range is 0.40mg/kg~75.00mg/kg.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 Analytical laboratory water specifications and test methods

3 Method summary

The sample was dissolved in 6% nitric acid in a boiling water bath, and then in a nitric acid medium, using an atomic absorption spectrophotometer at a wavelength of 357.9 nm. The absorbance of chromium is determined by an air-acetylene flame.

4 reagents and materials

Unless otherwise stated, only use chemical reagents identified as superior grade or treated by a steam acid system. Water is specified in GB/T 6682. Secondary water. 4.1 Nitric acid (ρ = 1.4 g/mL). 4.2 6% nitric acid solution. Mix appropriate amount of nitric acid (4.1) and water at a volume ratio of 6.94. 4.3 Chromium standard stock solution. The concentration is 1000μg/mL, and the commercially available certified chromium element standard solution is used. 4.4 Chromium standard working solution. accurately transfer appropriate amount of chromium standard stock solution (4.3), and gradually dilute with 6% nitric acid solution (4.2) to make solution concentration It is 10 μg/mL.

5 Instruments and equipment

5.1 Atomic absorption spectrophotometer. equipped with a chrome hollow cathode lamp, see Appendix A for working conditions. 5.2 Analytical balance. The sensitivity is 0.1 mg. 5.3 Volumetric flask. 50mL, 100mL. 5.4 Tube. 25 mL. 5.5 Pipette. 1mL, 5mL, 10mL.

6 Determination steps

6.1 Blank test A blank test was performed along with the sample. ......

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