1.19780

Chromate standard solution

traceable to SRM of NIST K₂CrO₄ in H₂O 1000 mg/l CrO₄ Certipur^®

• 동의어(들): Chromate standard for aqueous matrices ready foruse, Nota 1 A
• UNSPSC 코드: 41116107
• NACRES: NA.24

속성

• Quality Level: 100
• 기술: ion chromatography: suitable
• pH: 7 (20 °C in H₂O)
• density: 1.0 g/cm³ at 20 °C
• 응용 분야: environmental; food and beverages
• 형식: single component solution
• 저장 온도: 15-25°C

설명

분석 메모

Concentration     β (CrO₄²⁻): 990 - 1010 mg/l
Determination method: Iodometric titration.
The content of this solution was determined with sodium thiosulfate standard solution (article number 1.09147) standardized against volumetric standard potassium iodate (article number 1.02404). The expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 136f (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard potassium iodate, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.

법적 정보

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

안전성 정보

• 픽토그램: GHS08
• 신호어: Danger
• 유해 및 위험 성명서: H340 - H350i
• 예방조치 성명서: P201 - P202 - P280 - P308 + P313 - P405 - P501
• Hazard Classifications: Carc. 1B Inhalation - Muta. 1B
• Storage Class Code: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 1
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable