Ashless Filter Papers for Quantitative Analysis
Mô tả sản phẩm
Ashless filters (ash content approx. 0.004%), recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.
Máy Nghiền Đá Thanh Long
- Made of super- refined cotton linters and cellulose
- alpha-Cellulose content above 95%, therefore high stability and durability
- Acid-washed and therefore free of minerals and metallic ions, ideal for the detection of metallic ions
- For analytical applications, routine quantitative and /or gravimetric procedures
These filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring.
These filters are available as filter circles with the following sizes as standard (in mm):
12,5 – 12,7 – 40,5 – 47 – 55 – 70 – 90 – 110 – 125 – 150 – 185 – 240 – 320.
Other sizes, sheets and special cuts are available on request.
Technical Data
| Grade | Properties | Filtration Herzberg [s] | Retention rate* [μm] | Weight [gsm] | Thickness[mm] |
|---|---|---|---|---|---|
| 589/1 – black | fast | 50 | 12 – 25 | 79 | 0,19 |
| 589/2 – white | medium fast | 140 | 4 – 12 | 85 | 0,18 |
| 589/4 – yellow | medium fast, Low-fast | 170 | 4 – 7 | 81 | 0,17 |
| 589/5 – red | medium fast | 450 | 2 – 4 | 84 | 0,17 |
| 589/6 – green | slow, thinn | 900 | 2 | 74 | 0,15 |
| 589/3 – blue | slow | 750 ** | < 2 | 84 | 0,16 |
* Approximate values ** Measured with 100 mm water column instead of 50mm
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