4.1 White zinc pigments find considerable use in white paints, and as such it is useful to formulators and users to be able to monitor the amounts of these pigments in whole paints. It is also of interest to raw material suppliers and paint producers to check the specifications of each pigment.

1.1 These test methods cover procedures for the analysis of white zinc pigments.

1.2 The analytical procedures appear in the following order:

Section

Preparation of Sample

 6 

Zinc Oxide

Total Zinc, Using Diphenylamine as Internal Indicator

 7 

Total Zinc, Using Uranyl Acetate as External Indicator

 8 

Total Impurities

 9 

Total Sulfur

10

Moisture and Other Volatile Matter

11

Leaded Zinc Oxide

Total Lead

12

Total Zinc

13

Total Sulfur

14

Total Impurities

15

Moisture and Other Volatile Matter

16

Water-Soluble Salts

17

Zinc Sulfide

Zinc Oxide

18

Zinc Sulfide

19

Water-Soluble Salts

20

Moisture and Other Volatile Matter

21

Barium Sulfate

22

Titanium Dioxide

23

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 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.