LCS Materials for Residual Chlorine - Consistent and Easy-To-Use

SM1020B Sec. 3 of Standard Methods requires daily analysis of external standards along with your normal sample load. If you are doing residual chlorine analysis the daily LCS can be problematic because the analyte source material is quite unstable when diluted to typical analytical levels. And, unless packaged hermetically, stock standard solutions tend to degrade pretty rapidly requiring you to then re-standardize or re-purchase the materials more often than you might want.

To address the difficulty in handling standard solutions for residual chlorine, we worked to develop single use LCS standards that are packaged in a manner preventing volatilization while not requiring any pipets to prepare. The results are our new Total Chlorine Accuracy Check Solutions supplied at 1.00mg/L and 2.50mg/L. Each standard is supplied with a certificate of traceability listing concentration and acceptance limits.

Part# QCI-117 - 2.50mg/L Chlorine - 24 ampules for $35.00

Part# QCI-123 - 1.00mg/L Chlorine - 24 ampules for $35.00

These standards are packaged under Argon at exactly 1.50mL in 2mL amber "snap and pour" ampules in packages of 24 ampules. To use the standard add a small amount of chlorine free water to a 25mL volumetric flask or a 25mL sample cuvette. Then, take a standard ampule from the refrigerator and quantitatively transfer the contents of the ampule to the flask or cuvette with a couple of small rinsings. Because these ampules are the wide neck type, the standard should pour easily without the use of a transfer pipet. Once you complete the quantitative transfer, bring the solution up to 25mL and proceed directly to analysis.

We have designed these standards to be easiest to use with a 25mL colorimetric method, but our manufacturing process is flexible. So if you need standards for other methods or concentrations, please inquire. We can do it quickly and economically.