1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 Navistar, Inc. AUGUST 2009 Page 1 of 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFIC
2、ATION) NUMBER: CEMS BT-41 TITLE: Determination Of The Presence Of Chloride Ions In Air Conditioner Refrigerant CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIF
3、IED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the app
4、licability of regulatory limits prior to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method for determining the presence of chloride ions in air conditioner refrigerant. (This method is adapted from “Met
5、hods of Analysis for Fluorocarbon Refrigerants,” Du Pont, Inc., Test Method B-8.) 2.0 APPARATUS Test tube. 3.0 MATERIAL 3.1 Reagent grade silver nitrate. 3.2 Absolute methyl alcohol. 4.0 PROCEDURE 4.1 Prepare a saturated solution of silver nitrate in absolute methyl alcohol. 4.2 Measure 5 milliliter
6、s of absolute methyl alcohol into the test tube. 4.3 Add three to four drops of saturated solution of silver nitrate in absolute methyl alcohol and shake. 4.4 Add 5 milliliters of liquid refrigerant sample. Any turbidity observed in the solution indicates the presence of excess amounts of chloride ions and the test is a failure. Lack of turbidity in the solution indicates the presence of acceptable levels of chloride ions and the test passes. 5.0 REPORT Report Pass or Failure.
