About The Advantages and Main Usgaes of Filter Paper

High quality filter paper

HAWACH filter paper uses high-purityα-cellulose and cotton fiber as raw materials. The product has low ash content, that is, low background value and low impurity dissolution rate. It adopts the ISO9001 management system and has strict quality control links, so the quality stability between uniform batches and different batches of filter paper is high. HAWACH’s filter paper has CE certification and GTS third-party safety test report certification in terms of heavy metal ions.

Full range of filter paper

HAWACH filter paper has a complete range, including qualitative filter paper and quantitative filter paper. Qualitative filter paper also includes standard grade and wet-strength grade; wet-strength qualitative filter paper exhibits superior compression resistance under high pressure and vacuum experimental conditions and is not easy to break. Quantitative filter paper includes ashless grade, hardened low ash grade, etc., which can be convenient for customers with different needs to choose.

In addition, there are many types of HAWACH filter paper diameter: 55, 70, 90, 110, 125, 150, 180,185, 240, 270, 300mm, which is convenient for different customers to choose from.

quantitative-filter-papers-bio-41 hawach-filter-papers-bio-41 filter paper for laboratory use

Main usages of filter paper

As we’ve just mentioned above, the qualitative filter paper includes standard grade and wet-strength grade and the standard grade has Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, and Grade 6, the wet-strength grade has Grade 91 and Grade 113.

Quantitative filter paper includes ashless grade, hardened low ash grade, and hardened ash free grade: the ashless grade has Grade 40, Grade 41, Grade 42, Grade 43, and Grade 44; hardened low ash grade includes Grade 50, Grade 52, and Grade 54; the hardened ash free grade has Grade 540, Grade 541 and Grade 542.
The following will show each Grade’s main uses.

Qualitative filter paper
Grade 1: Soil analysis, seed test, ambient air particulate matter, exhaust gas detection
Grade 2: crop production test, ambient air monitoring, soil monitoring
Grade 3: Sample carrier
Grade 4: Air pollution monitoring
Grade 5: Water quality and soil analysis
Grade 6: Boiler water vapor analysis
Grade 91: Sugar test in sucrose
Grade 113: Suitable for filtration of large particles or gelatinous precipitation
Grade 595: Food, ICP/AAS environmental sample testing
Grade 597: Fat content test, CO2 removal, beverage turbidity test

Quantitative filter paper
Grade 40: AA (Atomic Absorption Spectrometry) previous sample purification, trace element/ atmospheric isotope collection
Grade 41: Iron or aluminum hydroxide, high-velocity air pollutants test
Grade 42: Barium sulfate, stannic acid, calcium carbonate precipitation
Grade 43: Food, soil, atmospheric monitoring (XRF technology), building construction, mining, iron and steel industry inorganic matter analysis
Grade 44: It cuts off finer particles, but the ash content of each sample is lower.
Grade 50: Optical fiber fall off (electronic industry), application of smearing labels
Grade 52: Hardened filter paper for regular filtration, medium retention capacity and flow rate, tough surface
Grade 54: Used for rapid vacuum filtration to remove coarse particles that are difficult to filter and to filter colloidal precipitates, such as ethyl hydroxyquinine in feed.
Grade 540: Commonly used in the analysis of the specific gravity of metal substances in acid/alkaline solutions.
Grade 541: Fiber test in animal food, gelatin test in milk, chloride in cement, chloride, and phosphide in coal and coke
Grade 542: It is often used for the determination of specific heavy metals.
Grade 589/1: Filtration of large particle precipitation, ash test in the food industry, and Blaine test in the cement industry
Grade 589/2: Filtration of moderate particulate matter, sand and dust content in food processing plants, grading of flour, suspension test in paper industry
Grade 589/3: Filtration of ultra-fine particles, testing of contaminants in animal and vegetable edible oils