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 2 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICA
2、TION) NUMBER: CEMS BT-48 TITLE: Determination Of Water & Methanol In Windshield Washer Solvent 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 VERIFIED FOR CURRENT
3、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 applicability of re
4、gulatory limits prior to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a test procedure for determining water and methanol in windshield washer solvent by gas chromatography. 2.0 APPARATUS 2.1 Gas
5、 Chromatograph (G.C.), capable of isothermal operation, with a thermal conductivity detector: integrator and strip-chart recorder. 2.2 Syringe, G.C. injection 0-101. 2.3 G.C. column, 1.83 m (72 inches) long x 6.35 mm (0.25 inch) diameter, packed with 10% Carbowax on a #6 Teflon support, or equivalen
6、t. 2.4 Gas Regulator, 2 stage, 0-700 kPa (0 - 100 psi) working range. Pipettes, volumetric, T D, 1, 2, 3, 4, 5, 10, 20 and 50 ml. 2.5 Volumetric flasks, glass, 100 ml 3.0 MATERIALS 3.1 Distilled water per ASTM D 1193, Type II. 3.2 Methanol, ACS reagent grade. 3.3 Helium, 99.999% purity, water pumped
7、 4.0 PREPARATION OF STANDARDS 4.1 Add the following amounts of distilled water to 100 ml volumetric flask and dilute to mark with methanol. 4.1.1 Standards for concentrated grade. Standard = Distilled Water, ml Mass % Water Mass % Methanol 1 0.00 0.00 100.00 2 1.00 1.26 98.74 3 2.00 2.52 97.48 4 3.
8、00 3.78 96.22 5 4.00 5.04 94.96 4.1.2 Standards for diluted grade. NUMBER: CEMS BT-48 TITLE Determination Of Water & Methanol In Windshield Washer Solvent CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corp
9、orate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 2 of 2 Standard = Distilled Water, ml Mass % Water Mass % Methanol 1 37.0 42.6 57.4 2 40.0 45.7 54.3 3 43.0 48.9 51.1 4 46.0 51.8 48.2 5 48.0 53.9 46.1 5.0 PROCEDURE 5.1 Calibrat
10、ion 5.1.1 Preliminary Instructions 5.1.1.1 Recommended parameters for the Carbowax , chromatographic column are as follows: (1) Injection Port Temperature 200C (2) Column Temperature 100C (3) Detector Temperature 300C (4) Column Inlet Pressure 448 kPa (65 psi) 5.1.1.2 Adjust instrument according to
11、manufacturers instructions. 5.1.2 Using the appropriate standards for the grade being tested, draw a 2 microliter sample of one of the Standards into the syringe and inject sample into the G.C. Care should be taken to exclude all air bubbles from the syringe. NOTE -Two peaks should be eluted within
12、5 to 10 minutes after injection of the standard. There should be little or no peak overlap. 5.1.3 Repeat Step 2 for the remaining standards for that grade. 5.1.4 Measure and record the areas under the water and the methanol peaks for the standards. 5.1.5 Plot concentration curves of area versus mass
13、 percent for water and for methanol. 5.2 Analysis of Sample 5.2.1 Treat sample as described under Steps 5.1.1 to 5.1.4 . NOTE: As an internal check run at least one of the standards to assure that the apparatus is functioning correctly. 5.2.2 Record water and methanol peak areas of the sample. 6.0 CALCULATION Plot areas for the water and the methanol peaks of the test sample on the standard concentration curves and determine mass percent of water and methanol in sample to the nearest 0.1%. 7.0 REPORT Mass percent water and methanol in sample.
