Document O11pRVx5aJj3nK5GKeL3vyr61

Ethanolamines/Glycol Ethers Tier 3 Procedure Section Number: 610 Issue Number: 1.3 Original Date: 12-17-91 Author: Revision Date: 12-29-95 Title: Use Of Burets References: Glossary Of Equipment Identification (Text #114) 610 Use Of Burets 1.0 Objective: 1.1 To ensure safe and proper use of burets in the lab. 2.0 Procedure: 2.1 Before using burets, make sure the overflow flask is not full, if flask is over half full, pour into a lab waste container. 2.2 Fill buret until it overflows. Be sure no air bubbles are in the buret. 2.3 Turn the stopcock at the bottom of the buret to release the liquid. The liquid may be released in small increments by turning the stopcock slowly to allow only a drop at a time. 2.4 When nearing the endpoint, set the stopcock to deliver a drop at a time. 2.5 Hold your hand on the stopcock so it can be turned off as soon as the solution changes color. 2.6 The buret should be read at the bottom of the meniscus, which is the bottom of the bubble at the surface of the liquid in the buret. 2.7 Read the meniscus after the first color change of the solution. 3.0 Revisions 3.1 Revision #1 02-19-93 Yearly Review 3.2 Revision #2 12-21-94 Yearly Review Date Printed:April 18, 1998 Printed Copies Of This Document Are Controlled And Not Subject To Update. The Controlled Version Is Maintained In File: Buret.Doc Page 1 Of 1 DO A 05987? CONFIDENTIAL 3.3 Revision #3 12-29-95 Yearly Review Date Printed:April 18, 1998 Printed Copies Of This Document Are Controlled And Not Subject To Update. The Controlled Version Is Maintained In File: Buret.Doc Page 2 Of 1 DO A 059873 CONFIDENTIAL