YS/T 953.10-2014Methods for chemical analysis of fire smelting nickel substrate material - Part 10: Determination of nickel, chromium, manganese, cobalt, copper and phosphorus contents - Inductively coupled plasma atomic emission spectrometric method (English PDF)

4.6 Mixed standard solution. Respectively PIPETTE 5.00 mL each of copper

and phosphorus single-element standard stock solutions (4.5), 10.00 mL each of chromium, cobalt, and manganese single-element standard stock solutions (4.5),

4.7 Yttrium internal standard solution. PIPETTE 25.00 mL of yttrium single-

element standard stock solution (4.5) into a 1000 mL volumetric flask; ADD 50 mL of hydrochloric acid (4.1); USE water to dilute to the mark and mix well. 1 mL of this solution contains 25 µg of yttrium.

5.1 Inductively coupled plasma atomic emission spectrometer

Spectral line. There is no special requirement for analysis line. Only recommended analysis lines are listed in Table 2.

5.2 Short-term stability requirements for the apparatus. When the maximum

mass concentration solution of the measured element is continuously measured for 5 times, the relative standard deviation of the absolute intensity of the emitted light shall be less than 0.8%.

7.1 Mass of test portion

According to Table 3, weigh the test portion, accurate to 0.0001 g.

7.4 Determination

7.4.1 Dissolution of test portion

PLACE the test portion (7.1) in a polytetrafluoroethylene beaker; ADD 5 mL of hydrochloric acid (4.1), 5 mL of nitric acid (4.2); HEAT to no longer react. ADD

2~3 drops of hydrofluoric acid (4.3);

7.4.2 Measurement

On the inductively coupled plasma emission spectrometer, after the apparatus runs stably, under the selected apparatus working conditions, use the prepared standard series solution (7.5) to standardize or calibrate the working curve. The correlation coefficient of the working curve of each element shall be above

0.999.Otherwise it is necessary to re-standardize or re-prepare standard series solution for standardization. MEASURE the spectral intensity of the analysis test solution (7.4.1) and the blank test solution (7.3). According to the working curve, the apparatus automatically processes the data, calculates and outputs the mass concentration of each element.

9.1 Repeatability

For the measured values of two independent test results obtained under repeatability conditions, within the average range given below, the absolute difference between the two test results does not exceed the repeatability limit (r).

9.2 Reproducibility

For the measured values of two independent test results obtained under reproducibility conditions, within the average range given below, the absolute difference between the two test results does not exceed the reproducibility limit (R).