YS/T 746.11-2010Methods for chemical analysis of lead-free tin-based solders. Part 11: Determination of Cadmium content. Flame atomic absorption spectrometric method (English PDF)

Foreword

YS/T 746 "non-Pb-based solder chemical analysis method" is divided into 17 parts.

--- Part 1 Determination of tin content Coke sexual gallic acid Covering - lead nitrate titration method

--- Part 2 of silver content - Flame atomic absorption spectrometry and potentiometric titration with potassium thiocyanate

--- Part 3 of copper content - Flame atomic absorption spectrometry and titration with sodium thiosulfate

--- Part 4 of lead content - Flame Atomic Absorption Spectrometry

--- Part 5 of bismuth content - Flame atomic absorption spectrometry and titration Na2EDTA

--- Part 6 of antimony content - Flame Atomic Absorption Spectrometry

--- Part 7 Determination of iron content by flame atomic absorption spectrometry

--- Part 8 of arsenic content of arsenic, antimony molybdenum blue spectrophotometric method

--- Part 9 Determination of zinc content by flame atomic absorption spectrometry and titration Na2EDTA Part 10 Determination of aluminum content --- first electrothermal atomic absorption spectrometry

--- Part 11 of cadmium content - Flame Atomic Absorption Spectrometry

--- Part 12 Determination of indium titration Na2EDTA

--- Part 13 Determination of nickel content by flame atomic absorption spectrometry

--- Part 14 Determination of the phosphorus content of the first crystal violet - heteropoly acid phosphovanadomolybdate spectrophotometry

--- Part 15 Determination of germanium content salicylfluorone spectrophotometry

--- Part 16 Determination of rare earth Arsenazo III spectrophotometry

--- Part 17 silver, copper, lead, bismuth, antimony, iron, arsenic, zinc, aluminum, cadmium, nickel, indium content was measured by inductively coupled plasma optical emission Spectroscopy this is Part 11.

This section is in accordance with GB/T 1.1-2009 given rules drafted.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is drafted. Yunnan Hualian Zinc Indium Corp. drafted.

Participated in the drafting of this section. High-tech Co., Ltd. Shenzhen Grammy Honghe CIQ.

1 Scope

YS/T 746 This section specifies the determination method without Tin Solder by cadmium content.

This section applies to the determination of lead-free tin-based solders in cadmium content. Measurement range. 0.00050% to 0.0100%.

2 Method summary

Sample was dissolved in hydrochloric acid and nitric acid, in the presence of a small amount of sulfuric acid, hydrochloric acid - hydrobromide exclude volatile tin, antimony and other impurities interfering elements in 12% of the mixed acid medium, atomic absorption spectrometer at a wavelength of 228.8nm, with flame atomization, air - acetylene flame measured cadmium Absorbance.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.

3.1 hydrochloride (rho1.19g/mL).

Nitrate 3.2 (rho1.42g/mL).

3.3 nitric acid (23).

3.4 sulfate (rho1.84g/mL).

3.5 hydrobromide (rho1.49g/mL).

3.6 hydrochloric acid - hydrobromide. hydrochloric acid (3.1) and hydrobromic acid (3.5) mixed in equal volumes.

3.7 mixed acid. 300mL of hydrochloric acid (3.1) and 100mL nitric acid (3.2) and mixed.

3.8 cadmium standard stock solution. Weigh 0.5000g cadmium (>=99.99%) in 200mL beaker, add 20mL of nitric acid (3.3), cover

Table pan, over low heat to dissolve. Cooled to room temperature. Water transferred 500mL volumetric flask, was added 25mL of hydrochloric acid (3.1), diluted with water to the mark with

Degree, and mix. This solution 1mL 1mg containing cadmium.

3.9 Cadmium Standard Solution A. Pipette 25.00mL cadmium standard stock solution (3.8) in 250mL volumetric flask, was added 10mL of hydrochloric acid (3.1), dilute to the mark with water and mix. This solution 1mL containing 100µg cadmium.

3.10 Cadmium standard solution B. Pipette 50.00mL cadmium standard solution (3.9) in 500mL volumetric flask, was added 20mL of hydrochloric acid (3.1), with Dilute with water to volume, and mix. This solution 1mL containing 10µg cadmium.

4 Instrument

Atomic absorption spectrometer, with a cadmium hollow cathode lamp.

Under optimum working conditions for those who can reach the following indicators can be used.

--- Characteristic concentration. a solution in the matrix is consistent with the measured solution, characteristic concentration of cadmium should be less than 0.009µg/mL.

--- Precision. measure 10 times the absorbance of the highest concentration of the standard solution, the standard deviation should not exceed 1% of the average absorbance; with