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YS/T 252.6-2020 English PDF (YST252.6-2020)

YS/T 252.6-2020 English PDF (YST252.6-2020)

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YS/T 252.6-2020: Methods for chemical analysis of nickel matte - Part 6: Determination of lead, zinc and arsenic contents - Inductively coupled plasma atomic emission spectrometry
This Part specifies methods for the determination of lead, zinc, arsenic content in high nickel matte. This Part applies to the determination of lead, zinc, arsenic content in high nickel matte. The measurement range is as shown in Table 1. Table 1 -- Measuring range Element Mass fraction / % Lead 0.020 ~ 0.50 Zinc 0.010 ~ 0.50 Arsenic 0.020 ~ 1.00 2 Method summary The sample is decomposed with hydrochloric acid, nitric acid, perchloric acid. In dilute hydrochloric acid medium, the emission intensity of each element is measured on an inductively coupled plasma atomic emission spectrometer. The contents of lead, zinc, arsenic are calculated according to the working curve method. 3 Reagents Unless otherwise stated, only reagents confirmed to be of superior purity are used in the analysis. All water used is water of grade-2 purity or above. 3.1 Hydrochloric acid (¦Ñ = 1.19 g/mL). 3.2 Nitric acid (¦Ñ = 1.42 g/mL). 3.3 Perchloric acid (¦Ñ = 1.84 g/mL). 3.4 Hydrochloric acid (1 + 1). 3.5 Nitric acid (1 + 1). YS/T 252.6-2020 ? Buy True-PDF ? Auto-delivery. Page 6 of 9 3.6 Sodium hydroxide solution (200 g/L): Weigh 200 g of sodium hydroxide. Place it in a 500 ml plastic beaker. Dissolve it with water. Cool to room temperature. Transfer it to a 1000 mL plastic volumetric flask. Use water to make the volume reach to the mark. 3.7 Phenolphthalein ethanol solution (1 g/L): Weigh 0.100 g of phenolphthalein. Place it in a 100 mL beaker. Dissolve it in absolute ethanol. Transfer it to a 100 mL volumetric flask. Use absolute ethanol to make the volume reach to the mark. 3.8 Lead standard stock solution: Weigh 1.0000 g of metallic lead (wPb ¡Ý 99.99%). Place it in a 300 mL beaker. Add 20 mL of nitric acid (3.5). Dissolve completely at low temperature. Rinse the watch glass and cup wall with water. Heat and boil to ex

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