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Whatman 标准级定性滤纸 Grade 2
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品牌 : Whatman
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产品分类：滤纸
This certified Grade 2 is tested according to the procedure detailed in ASTM E 2187-09, Sections 9.3.1 and 9.3.2. The paper meets both the conditioned (26.1 ± 0.5 g, SD < 0.3 g) and dried (24.7 ± 0.5 g, SD < 0.3 g) weight requirements.
The lot specific certificate can be downloaded from www.gelifesciences.com/certificates
Each lot is guaranteed to meet the ASTM E 2187-09 specifications
Simplifies testing process by removing lot suitability testing
Just condition and use
These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.
Grade 2 : 8 µm
Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed). More absorbent than Grade 1. In addition to general filtration in the 8 µm particle size range, the extra absorbency is utilized, for example, to hold soil nutrient in plant growth trials. Also used for monitoring specific contaminants in the atmosphere and in soil testing. Also available prepleated as Grade 2V.
Product 1002-500: Discontinued. No new products will be manufactured after 30th September 2017. No alternative is available.
PRODUCT SPECIFICATIONS
| Parameter | Grade 2 Qualitative Filter Paper Standard Grade |
|---|---|
| Grade | Grade 2 |
| Grade Type | Standard |
| Typical Particle Retention in Liquid 1 | 8 µm |
| Nominal thickness | 190 µm |
| Typical water flow rate 2 | 38 ml/min |
| Nominal basis weight | 97 g/m² |
| Nominal air flow rate | 20 s/100 ml/in² |
| Nominal Ash Content 3 | 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 |
| Application | Used for monitoring specific contaminants in the atmosphere and in soil testing. |
| Format | Circles / Sheets |
| Dimensions ( mm ) | 42.5 / 47 / 55 / 70 / 90 / 110 / 125 / 150 / 185 / 240 / 270 / 320 / 385 / 500 / 460*570 / 600*600 |
1：Particle retention rating at 98% efficiency.
2：For 9 cm diameter
3：Ash is determined by ignition of the cellulose filter at 900°C in air.
2：For 9 cm diameter
3：Ash is determined by ignition of the cellulose filter at 900°C in air.
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