GB/T 4103.15-2009Methods for chemical analysis of lead and lead alloys - Part 15: Determination of nickel content - Flame atomic absorption spectrophotometry (English PDF)

1 Scope

GB/T 4103 provisions of this part of the determination of nickel content in the lead.

This section applies to the determination of nickel content in lead. Measurement range. 0.0001% to 0.01%.

2 principle of the method

Sample dissolved in nitric acid, sulfuric acid precipitation lead to lead, using air - acetylene flame atomic absorption spectrometer at a wavelength of 232.0nm

Nickel measured absorbance to the standard curve method to calculate the amount of nickel.

3 Reagents

Unless otherwise indicated, the test for the preparation and analysis of water solutions are a water containers were used in the experiments with dilute nitric acid (1 + 4) immersion

After a thorough cleaning with water.

4 Instrument

Atomic absorption spectrometer, with a nickel hollow cathode lamp.

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

--- Characteristic concentration. In line with the measurement of the sample solution matrix solution, characteristic concentration of nickel should not exceed 0.05µg/mL;

--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%;

With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum

0.5% concentration of the standard average absorbance;

--- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment

Ratio of not less than 0.8;

--- Instrument reference operating conditions are shown in Table 1.