Macherey-Nagel

• Equivalent to Whatman No. 41

• Fast, ashless filter paper

• Recommended for analytical procedures involving coarse particles or gelatinous precipitates

• Surface: Smooth

• Basis weight: 85 g/m2

• Thicknes

• Allows the rapid detection of sulphite and sulphur dioxide

• Used in food analyzing laboratories

• The reaction is as follows: 2 IO3- + 5 SO32- + 2 H+ to 5 SO42- + I2 + H2O

• Sulphurous acid or sulphites reduce potassium i

• Wet-strengthened, general purpose, ashless filter paper with medium speed and medium retention

• Typical applications include gravimetric analysis for components, quantitative determinations of sediments and high purity clean up procedures

• Singly sealed to ensure long-term stability and protection against many external influences

• Have to be placed in the plastic reel with color scale to be used

• Gradation (pH): 4.0 - 4.3 - 4.6 - 4.9 - 5.2 - 5.5 - 5.8 - 6.1 - 6.4 -

• Gradation: 0 - 10 - 25 - 50 - 100 - 250 - 500 mg/L NO3-

• Color change: white to red-violet

• Without nitrite color scale, but with nitrite test pad

• Equivalent to Whatman No. 1

• Most widely used general purpose filter paper with medium retention and flow rate

• This filter paper covers a wide range of laboratory applications and is frequently used for clarifying liquids

&b

• Ashless, very slow filter paper for the filtration of finest particles in quantitative range

• Surface: Smooth

• Basis weight: 100 g/m2

• Thickness: 0.2 mm

• Filtration speed: 195 s

• Material: Cellulose

• CE Certified

• Approved for pH determination in vaginal secretion, for professional use only

• With chemically bound indicators which prevents bleeding and therefore contamination of the sample

• Gradation (pH): 3.6 - 4.1

• For use in Aquaculture

• Used for the rapid and reliable determination of the water quality in aquariums

• Within 60 seconds the easy dip-and-read-procedure provides important information on the carbonate hardness (alkalinity), wat

• The fastest qualitative filter paper with highest flow rate

• This very soft filter paper is used for example in routine clean up of large volumes of sample with coarse particles

• Surface: Smooth

• Basis weight: 85 g/m2 <

• Equivalent to Advantec Filter Paper No. 5B

• Equivalent to Whatman Filter Paper No. 43

• General purpose, ashless filter paper with medium speed and medium retention

• Typical applications include gravimetric analysis for

• Quick and easy determination of water hardness

• Gradation (Total Hardness): < 54 > 72 > 151.2 > 252 ppm CaCO3

• Color change (Total hardness): Green to red

• Allows the quick and easy detection of strong oxidizers such as nitrite and free chlorine

• Also used to control diazotization reactions

• Nitrite or free chlorine oxidize potassium iodide to form elemental iodine which reacts with

• Wet-strengthened, ashless filter paper, which is slightly more retentive than MN 1640 m with corresponding increase in filtration time

• The smooth surface allows fiber-free filtration, even for highly acidic and basic media

• Surf

• Gradation (pH): less than 5.4 - 5.4 - 5.7 - 6.0 - 6.2 - 6.4 - 6.7 - 7.0 - greater than 7.0

• For the convenient and reliable determination of low-range water hardness in feed water

• Easy Dip & Read procedure provides reliable results in 10 seconds

• Gradation (Total hardness): 0 - 5 - 10 - 20 ppm CaCO3

• Color ch

• Equivalent to Whatman No. 1

• Most widely used general purpose filter paper with medium retention and flow rate

• This filter paper covers a wide range of laboratory applications and is frequently used for clarifying liquids

&b

• Changes colour from blue to red when conditions change from alkaline to acidic

• General test for acidic or alkaline reaction

• pH range: 8.0 - 5.0