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  • ASTM
    D6656-01(2010)e1 Standard Test Method for Determination of Chromic Oxide in Wet Blue (Perchloric Acid Oxidation)
    Edition: 2010
    $144.00
    Unlimited Users per year

Description of ASTM-D6656 2010

ASTM D6656 - 01(2010)e1

Standard Test Method for Determination of Chromic Oxide in Wet Blue (Perchloric Acid Oxidation)

Active Standard ASTM D6656 | Developed by Subcommittee: D31.02

Book of Standards Volume: 15.04




ASTM D6656

Significance and Use

The procedure described is specific for chromium in wet blue. Vanadium is the only common interfering element and is rarely present in quantity. The precision and accuracy of the methods are usually, at least, as good as the sampling of wet blue itself.

The chromium content of wet blue is related to the degree of tannage obtained, and hence may be a matter for specification in the purchase of wet blue. The procedure described provides adequate accuracy for this purpose.

1. Scope

1.1 This test method covers the determination of chromic oxide in wet blue that has been partly or completely tanned with chromium compounds. In general, the samples will contain chromium content between 1 % and 5 % when calculated as chromic oxide expressed upon a dry basis otherwise referred to as moisture-free basis (mfb).

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

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See Section 9 for specific safety hazards.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D6658 Test Method for Volatile Matter (Moisture) of Wet Blue by Oven Drying

D6659 Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests

E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals


Keywords

blue stock; chrome content; chromic oxide; perchloric acid oxidation; wet blue; Perchloric acid oxidation; Chromic oxide; Wet blue;


ICS Code

ICS Number Code 59.140.10 (Processes and auxiliary materials); 71.040.40 (Chemical analysis)


DOI: 10.1520/D6656-01R10E01

ASTM International is a member of CrossRef.

ASTM D6656



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