YS/T 746.5-2010Methods for chemical analysis of lead-free tin-based solders. Part 5: Determination of bismuth content. Flame atomic absorption spectrometric methods and EDTA titrimetric methods (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 5.

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 Tin Group Co., Ltd.

Participated in the drafting of this section. Guangxi China Tin Group Co., Ltd.

1 Method, flame atomic absorption spectrometry

1 Scope

YS/T 746 This section specifies the determination method based solder lead-free solder of bismuth content.

This section applies to the determination of lead-free tin-based solders in the bismuth content. Measurement range. 0.0050% to 5.00%.

2 Method summary

Samples with hydrochloric acid - hydrogen peroxide dissolved in the presence of sulfuric acid, hydrochloric acid - low hydrobromide exclude tin, antimony, in an acidic medium, in the atom Absorption Spectrometer at a wavelength of 223.1nm, with flame atomization, air - acetylene flame measured 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 (11).

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

3.5 sulfate (rho1.84g/mL).

3.6 sulfate (11).

3.7 hydrobromide (rho1.49g/mL).

3.8 hydrobromide (11).

HCl 3.9 - hydrobromic acid (11).

3.10 Hydrogen peroxide (30%).

3.11 isopropyl ether (CP).

3.12 Bismuth standard stock solution. Weigh 1.0000g of bismuth (>=99.99%) in 250mL beaker, add 50mL of nitric acid (3.3), cover

Table pan, heat gently to dissolve, cooled to room temperature and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL

Bismuth-containing 1mg.

3.13 Bismuth standard solution. Pipette 50.00mL bismuth standard stock solution (3.12) in 500mL flask, add 50mL mixed acid (3.4), dilute to the mark and mix. This solution 1mL containing 100µg bismuth.

4 Instrument

Atomic absorption spectrometer, with a bismuth hollow cathode lamp.