三级片视频播放,精品三级片在线观看,A级性爱视频,欧美+日韩+国产+无码+小说,亲子伦XX XX熟女,秋霞最新午夜伦伦A片黑狐,韩国理伦片漂亮的保拇,一边吃奶一边做边爱完整版,欧美放荡性护士videos

Simple Accuracy Checks

Voluette and PourRite Ampule Standards are designed to work directly with Standard Additions accuracy checks in Hach procedures and photometer software. Use the TenSette Pipet to add precise spikes of standard and check percent recovery, to confirm analytical system performance.

Minimize waste

Open a fresh standard ampule for each accuracy check. Each ampule contains enough standard for one set of standard additions.

Reliable results

Sealed ampules prevent accidental contamination or evaporation of standard solutions.

Specifications

# Tests:16

Concentration:4000 mg/L

Description :Formaldehyde as CH₂O (NIST)

Platform :S

Quantity:10 mL /