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GB/T 11064.15-2013 PDF English

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GB/T 11064.15-2013: Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride -- Part 15: Determination of fluoride content -- Ion selective method
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GB/T 11064.15: Evolution and historical versions

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GB/T 11064.15-2013English90 Add to Cart 0-9 seconds. Auto-delivery Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride -- Part 15: Determination of fluoride content -- Ion selective method Valid
GB/T 11064.15-1989English199 Add to Cart 2 days Lithium carbonate--Determination of fluoride content--Ion selective electrode method Obsolete

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GB/T 11064.15-2013: Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride -- Part 15: Determination of fluoride content -- Ion selective method



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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.120.99 H 64 GB/T 11064.15-2013 Replacing GB/T 11064.15-1989 Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride - Part 14.Determination of fluoride content - Ion selective method Issued on. NOVEMBER 27, 2013 Implemented on. AUGUST 1, 2014 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. GB/T 11064.15-2013

Table of Contents

Foreword... 3 1 Scope... 5 2 Method summary... 5 3 Reagents... 5 4 Instruments... 6 5 Samples... 6 6 Analysis steps... 6 7 Calculation of analysis results... 8 8 Precision... 8 9 Test report... 9 GB/T 11064.15-2013

Foreword

GB/T 11064 “Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride” is divided into 16 parts. - Part 1.Determination of lithium carbonate content - Acid-alkali titrimetric method - Part 2.Determination of lithium hydroxide content - Acid-alkali titrimetric method - Part 3.Determination of lithium chloride content - Potentiometric method - Part 4.Determination of potassium and sodium content - Flame atomic absorption spectrometric method - Part 5.Determination of calcium content - Flame atomic absorption spectrometric method - Part 6.Determination of magnesium content - Flame atomic absorption spectrometric method - Part 7.Determination of iron content-1,10-phenanthroline spectrophotometric method - Part 8.Determination of silicon content - Molybdenum blue spectrophotometric method - Part 9.Determination of sulfate content - Barium sulfate nephelometry method - Part 10.Determination of chloride content - Silver chloride nephelometry method - Part 11.Determination of acid-insolubles content - Gravimetric method - Part 13.Determination of aluminum content - Chromazurol s-cetylpyridine bromide spectrophotometric method - Part 14.Determination of arsenic content - Molybdenum blue spectrophotometric method - Part 15.Determination of fluoride content - Ion selective method - Part 16.Determination of calcium, magnesium, copper, lead, zinc, nickel, manganese, cadmium and aluminum content - Inductively coupled plasma atomic emission spectrometry This Part is Part 15 of GB/T 11064. This Part is drafted in accordance with rules given in GB/T 1.1-2009. GB/T 11064.15-2013 The Part replaces GB/T 11064.15-1989 "Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride - Part 15. Determination of fluoride content - Ion selective electrode method". Compared with GB/T 11064.15-1989, the main changes of this Part are as follows. - The measurement range is changed from “0.0005% ~ 1.00%” to “0.0005% ~ 0.10%”; - CHANGE “On Grignard drawing paper, take the volume of added fluorine standard solution as the abscissa, and the electrode potential as the ordinate to draw the curve.” to “Create an Excel table, take the volume of fluorine standard solution B (Vx) as the abscissa, and (Vs + Vx) × 10-E/S as the ordinate to draw the curve [Vs = 50mL, S = 58 (fluorine monovalent ions)].” - ADD the repeatability terms; - RE-EDIT the text format; ADD the test report. This Part shall be under the jurisdiction of National Standardization Technical Committee of Nonferrous Metals (SAC/TC 243). Drafting organizations of this Part. Xinjiang Research Institute of Nonferrous Metals, Beijing Research Institute of Mining & Metallurgy, and Jiangxi Ganfeng Lithium Co., Ltd. The main drafters of this Part. Guan Yuzhen, Wang Hongchuan, Jiang Qiutao, Li Qiang, Xiao Haiyan, and Zhu Xiangyu. The historical version replaced by this Part is as follows. - GB/T 11064.15-1989. GB/T 11064.15-2013 Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride - Part 15.Determination of fluoride content – Ion selective method

1 Scope

This Part of GB/T 11064 specifies the determination method of fluoride content in lithium carbonate. This Part applies to the determination of fluoride content in lithium carbonate. The determination range is 0.0005% ~ 0.10%.

2 Method summary

The sample is decomposed with nitric acid; use sodium citrate - nitrate solution as ionic strength adjustment solution; at the condition that the pH value is 7.0, use fluoride ion selective electrode to determine the fluorine content.

3 Reagents

Unless otherwise indicated, all reagents used in this Part are analytical reagent, the water used is double-deionized water. 3.1 Nitric acid (1 + 3), guarantee reagent. 3.2 Sulfuric acid (1 + 1), guarantee reagent. 3.6 P-nitrophenol indicator (1g/L). 3.7 Fluorine standard stock solution. Weigh 2.210g of sodium fluoride that has been GB/T 11064.15-2013 barked at 110°C for 2h and cooled in the dryer to room temperature; place in a 250mL beaker; dissolve with water and transfer into a 1000mL volumetric flask; dilute with water to the mark; mix well. Store in plastic bottles. 1mL of this solution contains 1mg of fluorine. 3.8 Fluorine standard Solution A. Pipette 25.00mL of fluorine standard stock solution (3.7); place in a 250mL volumetric flask; dilute with water to the mark, mix well. Store in plastic bottles. 1mL of this solution contains 100μg of fluorine.

4 Instruments

4.1 Ion meter. the accuracy is ± 0.2mV. 4.2 pH meter. 4.3 Electromagnetic stirrer. 4.4 Fluorine electrode. before using, use fluorine-containing solution (10μg/mL~ 50μg/mL) to soak for 30min.

5 Samples

Samples shall be baked in advance at 250°C for 2h, and placed in the dryer to cool to room temperature.

6 Analysis steps

6.1 Samples Weigh 1.00g of sample, accurate to 0.0001g. 6.2 Number of determination Independently carry out two measurements; take the mean value. GB/T 11064.15-2013 6.4 Determination 6.4.1 Place the sample (6.1) in a 50mL beaker; add a small amount of water and 1 drop of p-nitrophenol indicator (3.6); dropwise add about 8mL of nitric acid (3.1) until completely decomposed; transfer to the volumetric flask according to Table 1; dilute with water to the mark, mix well. 6.5 Create an Excel table; take the volume of fluorine standard solution B (Vx) as the abscissa, and (Vs + Vx) × 10-E/S as the ordinate to draw the curve [Vs = 50mL, S = 58 (fluorine monovalent ions)]. Downwardly extent the drawn straight line to make it intersect with the abscissa axis; the distance between the coordinate origin and the point of intersection is equivalent to the volume of fluorine-containing standard solution B (V1) in the test solution. GB/T 11064.15-2013

7 Calculation of analysis results

Fluorine content is calculated in mass fraction w(F-), expressed in %, according to equation (1).

8 Precision

8.1 Repeatability For the two independent test results obtained under repeatability conditions, within the average-value range as given below, the absolute difference of these two test results does not exceed the repeatability limit (r), and the situation exceeding repeatability limit (r) is not more than 5%. Repeatability limit (r), according to Table 2, adopts linear interpolation or epitaxy method to obtain.

9 Test report

The test report shall contain the following content. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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