Standards

YS/T 866-2024 Active

YS/T 866-2024 Lead-free solder base and zinc base gold spray wire for capacitor end surfaces YS/T 866-2024

This document is applicable to lead-free tin-based and zinc-based gold-sprayed wires used on the end faces of metallized film capacitors

Publish Date: 2024-10-24

YS/T 521.1-2024 Active

YS/T 521.1-2024 YS/T 521.1-2024 Chemical analysis methods for crude copper, black copper, and anode copper - Part 1: Determination of copper content

This document is applicable to the determination of the copper content in crude copper, black copper, and anode copper

Publish Date: 2024-10-24

YS/T 1111-2024 Active

YS/T 1111-2024 YST 1111-2024 Copper profiles for magnetic pole coils

This document is applicable to copper profiles used in the magnetic pole coils of hydroelectric generators.

Publish Date: 2024-10-24

YS/T 240.10-2024 Active

YS/T 240.10-2024

This document is applicable to the determination of the aluminum trioxide content in bismuth concentrate. The determination range (mass fraction) of the chromotrope S photometry method is 0.10% to 5.00%, and the determination range (mass fraction) of the Na2EDTA titration method is >5.00% to 10.00%.

Publish Date: 2024-10-24

YS/T 240.9-2024 Active

YS/T 240.9-2024 YS/T 240.9-2024 Bismuth concentrate chemical analysis methods Part 9: Determination of copper content by iodometric and flame atomic absorption spectroscopy methods

This document is applicable to the determination of copper content in bismuth concentrate. The determination range (mass fraction) of the iodometry method is >5.00%~25.00%, and the determination range (mass fraction) of the flame atomic absorption spectrometry method is 0.050%~5.00%.

Publish Date: 2024-10-24

YS/T 240.8-2024 Active

YS/T 240.8-2024 YS/T 240.8-2024 Bismuth concentrate chemical analysis methods Part 8: Determination of arsenic content by DDTC-Ag spectrophotometry and ammonium ferrous sulfate titration method

This document is applicable to the determination of arsenic content in bismuth concentrate. The determination range (mass fraction) of the DDTC-Ag spectrophotometry method is 0.010% to 1.00%, and the determination range (mass fraction) of the ammonium ferric sulfate titration method is >1.00% to 10.00%.

Publish Date: 2024-10-24

YS/T 240.7-2024 Active

YS/T 240.7-2024 YS/T 240.7-2024 Method for chemical analysis of bismuth concentrates - Part 7: Determination of sulfur content by combustion-neutralization titration method

This document is applicable to the determination of sulfur content in bismuth concentrate, with a measurement range (mass fraction) of 10.00% to 40.00%.

Publish Date: 2024-10-24

YS/T 240.5-2024 Active

YS/T 240.5-2024

This document is applicable to the determination of molybdenum content in bismuth concentrate, with a measurement range (mass fraction) of 0.020% to 9.00%.

Publish Date: 2024-10-24

YS/T 240.4-2024 Active

YS/T 240.4-2024 YS/T 240.4-2024 Bismuth concentrate chemical analysis methods Part 4: Determination of tungsten trioxide content - Sodium thiocyanate spectrophotometric method

This document is applicable to the determination of tungsten trioxide content in bismuth concentrate, with a measurement range (mass fraction) of 0.20% to 5.00%.

Publish Date: 2024-10-24

YS/T 240.3-2024 Active

YS/T 240.3-2024 YS/T 240.3-2024 Bismuth concentrate chemical analysis methods Part 3: Determination of silicon dioxide content - Spectrophotometric method for silicon and weight method

This document is applicable to the determination of the silica content in bismuth concentrate. The determination range (mass fraction) of the silico-molybdenum blue spectrophotometry method is 0.50% to 20.00%, and the determination range (mass fraction) of the gravimetric method is >20.00% to 40.00%.

Publish Date: 2024-10-24

YS/T 240.1-2024 Active

YS/T 240.1-2024 YS/T 240.1-2024 Bismuth concentrate chemical analysis method Part 1: Determination of bismuth content by Na2EDTA titration method

This document is applicable to the determination of bismuth content in bismuth concentrate, with a measurement range (mass fraction) of 10.00% to 60.00%.

Publish Date: 2024-10-24

YS/T 665-2024 Active

YS/T 665-2024 YS/T 665-2024 Refined aluminum ingot for remelting

This document is applicable to the high-purity aluminum ingots used for remelting, which are produced by methods such as the three-layer liquid electrolysis method, the partial segregation method, and the single electrolysis method

Publish Date: 2024-10-24