Method for improving accuracy and precision of trace amount antimony in metal lead measuring
A metal lead, precision technology, used in the preparation of test samples, measurement of color/spectral properties, etc., can solve problems such as instability, poor linearity of the standard curve, lack of control methods, etc.
Image
Examples
Embodiment 1
[0035] This implementation example illustrates the determination result of this method to low content antimony in metallic lead.
[0036] The solution preparation and the drawing of the standard solution working curve are completely operated according to the contents of the invention (1) and (2).
[0037] Sample analysis: Weigh the national standard substance GB469-83 1 # Sample 5.0000 grams, GB469-83 2 # Sample 4.0000 grams of sample in a series of 250mL beaker, add 40mL of 1+3 nitric acid, heat at low temperature to dissolve, boil to remove nitrogen oxides, cool, rinse the watch glass and cup wall with water, add 8mL of 1+3 sulfuric acid solution, heat and evaporate to Emit white smoke and nearly dry, cool, add 10mL 1+1 hydrochloric acid, the following operations are completed according to the steps in the sample analysis (3) of the content of the invention. The obtained measurement results are shown in Table 1.
[0038] Table 1 Determination results of low content antimo...
Embodiment 2
[0042] This implementation example illustrates the determination results of this method to the lower content of antimony in metallic lead.
[0043] The solution preparation and the drawing of the standard solution working curve are completely operated according to the contents of the invention (1) and (2).
[0044] Sample analysis: Weigh the national standard substance GB469-83 3 # Sample 2. Put 0000 grams of sample in a 250mL beaker, add 20mL of 1+3 nitric acid, heat at low temperature to dissolve, boil to remove nitrogen oxides, cool, rinse the watch glass and the wall of the cup with water, and transfer it into a 50mL volume filled with 20mL1+3 sulfuric acid solution in advance. In the bottle, make up to volume with water and let stand.
[0045] Take 20 mL of the supernatant, add 8 mL of 1+3 sulfuric acid solution, heat and evaporate until white smoke is emitted and nearly dry, and then cool. Add 10mL 1+1 hydrochloric acid, and the following operations are completed accor...
Embodiment 3
[0050] This implementation example illustrates this method to the determination result of relatively high content antimony in metallic lead.
[0051]The solution preparation and the drawing of the standard solution working curve are completely operated according to the contents of the invention (1) and (2).
[0052] Sample analysis: Weigh the national standard substance GB469-83 5 # Sample 0.5000 grams of sample in a 250mL beaker,
[0053] Heat at low temperature to dissolve, boil to remove nitrogen oxides, cool, rinse the watch glass and cup wall with water, transfer to a 50mL volumetric flask filled with 20mL 1+3 sulfuric acid solution in advance, dilute to volume with water, and let stand.
[0054] Separate 10 mL of the supernatant into a 250 mL beaker, add 8 mL of 1+3 sulfuric acid solution, heat and evaporate until white smoke is emitted and nearly dry, then cool. Add 10mL 1+1 hydrochloric acid, and the following operations are completed according to the steps in the sa...
PUM
Login to View More Abstract
Description
Claims
Application Information
- IPC
- G01N21/31; G01N1/28
- Inventors
- ε΄ζ; ζ’ιι£