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Whatman Filter Circles, 185mm Dia, Grade 4, 100/pk

SKU:
GBS 1004-185
  • $61.98

    • Description

    Whatman Filter Circles, 185mm Dia, Grade 4, 100/pk

    Whatman is a registered trademark of Cytiva.

    ParameterGrade 4 Qualitative Filter Paper Standard Grade, circle, 185 mm
    Grade Grade 4 
    Grade Type Standard 
    Diameter 185 mm
    Typical Particle Retention in Liquid1 25 µm 
    Nominal Thickness 210 µm
    Typical water flow rate2 247 ml/min 
    Nominal Basis Weight 92 g/m²
    Nominal Air Flow Rate 4 s/100 ml/in² 
    Nominal Ash Content3 0.06% 
    Material Cellulose 
    Typical Trace Element Levels Aluminium 3.6 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 27.5 µg/g Chromium 1 µg/g Copper 0.9 µg/g Iron 13.7 µg/g Lead <0.5 µg/g Magnesium 21 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 6.2 µg/g Silicon 8.8 µg/g Sodium 32.3 µg/g Zinc 58.3 µg/g