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  • หน้าแรก>>Products>>Water Test Kits A-O>>pH Test Kits>>กระดาษลิตมัส pH 3 -10 (เหลือง, แดง, น้ำเงิน, ม่วง, ขาว)
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    กระดาษลิตมัส pH 3 -10 (เหลือง, แดง, น้ำเงิน, ม่วง, ขาว)

    Indicator papers without colour scale
    For orientation and adjustment of pH values

    These products are simple, completely impregnated indicator papers, which do not allow exact pH determinations, but pH adjustments during special chemical procedures. For this reason, no colour scale is provided with these papers.

    Brilliant yellow paper (Yellow to Red)
    Quick and easy determination of alkali concentration
    yellow paper 

    Yellow paper, which changes colour to red near neutral (pH 6.7 – 7.9).

    Recommended application:
    demonstration of a specific alkali concentration, which is required for special reactions

    Product data and ordering information
    Type pH indicator papers
    Presentation Box of 200 test strips, 10 x 70 mm
    Color reaction
    yellow  red
    pH range 6.7 – 7.9
    REF 90701
    Congo paper MN 260 HE (Red to Blue)
    Quick and easy determination of lactic acid
    red paper

    Red paper, which changes colour to blue in the pH range 3.0 – 5.0.

    Congo paper is supplied in three versions of varying sensitivity:
    Congo paper MN 816 N – normal sensitivity
    Congo paper 
    MN 260 HE 
    – high sensitivity
    Congo paper 
    MN 616 T
     – medium sensitivity,

    Recommended application:
    Neutralisation analysis; detection of lactic acid in culture media, which contain lactic acid-producing strains of B. coli.

    Product data and ordering information
    Type pH indicator papers
    Presentation Box of 200 test strips, 20 x 70 mm
    Color reaction red  blue
    pH range 5.0 – 3.0
    REF 90705
    Congo paper MN 816 N (Red to Blue)
    Quick and easy determination of lactic acid
    red paper reel

    Red paper, which changes colour to blue in the pH range 3.0 – 5.0.

    Congo paper is supplied in three versions of varying sensitivity:
    Congo paper MN 816 N – normal sensitivity
    Congo paper 
    MN 260 HE 
    – high sensitivity
    Congo paper 
    MN 616 T
     – medium sensitivity

    Recommended application:
    Neutralisation analysis; detection of lactic acid in culture media, which contain lactic acid-producing strains of B. coli.

    Product data and ordering information
    Type pH indicator paper
    Presentation Reel of 5 m length and 7 mm width
    Color reaction red  blue
    pH range     5.0 – 3.0
    REF 90702
    Litmus paper blue (Blue to Red)
    Quick and easy determination of acidic and alkaline reaction
    blue paper

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

    Recommended application:
    General test for acidic or alkaline reaction: It serves in neutralisation reactions to check whether the change from acid to alkaline or vice versa has taken place. Litmus paper is the bestknown indicator paper.

    Chemistry:
    Litmus is not a single, chemically defined substance but a natural product containing a mixture of substances. It is extracted from lichen and probably represents the oldest known indicator dye.

    Product data and ordering information
    Type pH indicator paper
    Presentation 91106 : Reel of 5 m length and 7 mm width
    91126 : Booklet of 100 strips, 10 x 70 mm
    Color reaction
    blue  red
    pH range
    8.0 – 5.0
    REF 91106
    91126
    Litmus paper neutral (Violet to Red, Violet to Blue)
    Quick and easy determination of acidic and alkaline reaction
    violet paper

    Litmus paper neutral:
    violet indicator paper which changes to red under acid conditions and to blue under alkaline conditions.

    Recommended application:
    General test for acidic or alkaline reaction: It serves in neutralisation reactions to check whether the change from acid to alkaline or vice versa has taken place. Litmus paper is the bestknown indicator paper.

    Chemistry:
    Litmus is not a single, chemically defined substance but a natural product containing a mixture of substances. It is extracted from lichen and probably represents the oldest known indicator dye.

    Product data and ordering information
    Type pH indicator papers
    Presentation 91107 : Reel of 5 m length and 7 mm width
    91127 : Booklet of 100 strips, 10 x 70 mm
    Color reaction
    red  violet  blue
    pH range 5,0 – 8,0
    REF 91107
    91127
    Litmus paper red (Red to Blue)
    Quick and easy determination of acidic and alkaline reaction
    litmus red

    Litmus paper red:
    changes colour from red to blue when conditions change from acidic to alkaline.

    Recommended application:
    General test for acidic or alkaline reaction: It serves in neutralisation reactions to check whether the change from acid to alkaline or vice versa has taken place. Litmus paper is the bestknown indicator paper.

    Chemistry:
    Litmus is not a single, chemically defined substance but a natural product containing a mixture of substances. It is extracted from lichen and probably represents the oldest known indicator dye.

    Product data and ordering information
    Type pH indicator papers
    Presentation 91108 : Reel of 5 m length and 7 mm width
    91128 : Booklet of 100 strips, 10 x 70 mm
    Color reaction
    red  blue
    pH range 5,0 – 8,0
    REF 91108
    91128
    Nitrazine yellow paper (Yellow to Violet-Blue) 
    Quick and easy determination for neutralisation analyses
    Nitrazine yellow paper

    Yellow paper which changes to blue when the pH exceeds 6 towards alkaline conditions (greyish blue at pH 7; blue at pH > 8).

    Recommended application:
    neutralisation analyses

    Product data and ordering information
    Type pH indicator papers
    Presentation Box of 200 test sticks, 20 x 70 mm
    Color reaction yellow  violet-blue
    pH range 6.0 – 7.0
    REF 90711
    Phenolphthalein paper (White to Red)
    Quick and easy determination for neutralisation analyses
    litmus white

    White paper, which changes colour to red when the pH exceeds 8.3 towards alkaline conditions (red at pH > 10).

    Recommended application:
    neutralisation analyses

    Product data and ordering information
    Type pH indicator papers
    Presentation Reel of 5 m length and 7 mm width
    Color reaction white  red
    pH range 8.3 – 10.0
    REF 90712

     

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