GB/T 3253.7-2009Methods for chemical analysis of antimony and antimony trioxide - Determination of bismuth content - Atomic fluorescence spectrometric method (English PDF)

3.1

potassium borohydride.

3.2

hydrochloride (rho1.19g/mL).

Nitrate 3.3 (rho1.42g/mL).

3.4

aqua regia (1 + 1).

3.5

HCl (1 + 1).

3.6

nitric acid (1 + 1).

3.7

Sodium hydroxide solution (100g/L is formulated with excellent pure sodium hydroxide).

3.8

solution of potassium borohydride (15g/L).

Weigh 7.5g potassium borohydride (3.1), add 25mL of sodium hydroxide solution (3.7), dissolve completely, add water volume to 500mL. The time is now equipped with.

3.9

tartaric acid solution (200g/L).

3.10

standard solution.

3.10.1

bismuth standard stock solution (100µg/mL).

Weigh 0.1000g pure bismuth (Bi mass fraction >=99.99%) in 250mL beaker, 100mL nitric acid (3.6), cover the table

Side dish, heat gently to dissolve clear, cooled, washed with water dish and cup wall surface. Moved into 1000mL volumetric flask, dilute with water to volume, and mix.

3.10.2

bismuth standard solution (10µg/mL).

Pipette standards 10.00mL bismuth stock solution (3.10.1) in 100mL volumetric flask, was added 10mL of nitric acid (3.6), diluted with water to

Volume, and mix.

3.10.3

bismuth standard solution (0.1µg/mL).

Pipette 1.00mL bismuth standard solution (3.10.2) in 100mL volumetric flask, was added 10mL of nitric acid (3.6), diluted with water to the mark,

Mix well.

3.11

material.

Argon (>=99.99%). shielding gas and carrier gas.