The accuracy of many analytical measurements is dependent upon the manner in which the standard solutions are prepared and stored, and the accuracy with which they are standardized. Combining the methods recommended for the preparation and handling of such solutions into one practice eliminates the necessity for covering such details in all of the methods wherein the solutions are used.

1.1 This practice covers procedures for the preparation, standardization, and storage of the standard volumetric solutions and reagent testing solutions commonly used in chemical analysis.

1.2 The information in this practice is arranged as follows:

	Sections
Referenced Documents	2
Terminology	3
Significance and Use	4
Apparatus	5
Temperature effects	6
Measurements	7
Reagents	8
Concentration of solutions	9
Mixing of solutions	10
Storage of solutions	11
Preparation and standardization of solutions	12
Precision and Bias	13
Sodium hydroxide solution, 0.02 to 1.0 meq/mL (N)	14 to 19
Hydrochloric acid, 0.02 to 1.0 meq/mL (N)	20 to 28
Sulfuric acid, 0.02 to 1.0 meq/mL (N)	29 to 33
Hydrochloric acid, special 1 meq/mL (N)	34 to 38
Sulfuric acid, special 1meq/mL (N)	39 to 43
Silver nitrate solution, 0.1 meq/mL (N)	44 to 48
Ammonium thiocyanate solution, 0.1 meq/mL (N)	49 to 53
Iodine solution, 0.1 meq/mL (N)	54 to 58
Sodium thiosulfate solution, 0.1 meq/mL (N)	59 to 63
Potassium permanganate solution, 0.1 meq/mL (N)	64 to 68
Potassium dichromate solution, 0.1 meq/mL(N)	69 to 73
Methanolic sodium hydroxide solution, 0.5 meq/mL (N)	74 to 79
Ceric sulfate solution, 0.1 meq/mL (N)	80 to 84
Acetous perchloric acid, 0.1 meq/mL (N)	85 to 89
Disodium ethylenediaminetetraacetate solution, 0.05 mol/L(M)	90 to 94
Standard ion solutions	95
Nonstandardized reagent solutions and indicator solutions	96

1.3 The values stated in SI units are to be regarded as 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. Specific warning statements are given throughout this practice.