---
title: "ASTM D4780"
url: "https://mat-cs.com/astm-d4780/"
description: "This test method covers the determination of the specific surface area of catalysts and catalyst carriers in the range from 0.05 m2/g to 10 m2/g."
---

ASTM Standard

# ASTM D4780

Standard Test Method for Determination of Low Surface Area of Catalysts and Catalyst Carriers by Multipoint Krypton Adsorption

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## Significance and Use

5.1 This test method has been found useful for the determination of the specific surface area of catalysts and catalyst carriers in the range from 0.05 m2/g to 10 m2/g for materials specification, manufacturing control, and research and development in the evaluation of catalysts. The determination of surface area of catalysts and catalyst carriers above 10 m2/g is addressed in Test Method D3663 – Surface Area of Catalyst and Catalyst Carriers – and is appropriate for most samples with specific surface areas above 1 m2/g.

## Scope

1.1 This test method covers the determination of the specific surface area of catalysts and catalyst carriers in the range from 0.05 m2/g to 10 m2/g. A volumetric measuring system is used to obtain at least three data points which fall within the linear _BET_ region.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.