CHEMetrics I-2020 Peracetic Acid SAM Kit Instruction Manual
- June 1, 2024
- CHEMetrics
Table of Contents
I-2020 Peracetic Acid SAM Kit
Instruction Manual
Peracetic Acid SAM
I-2020 0 to 5.00
PPM (mg/Liter)
I-2020 Peracetic Acid SAM Kit
To Set Zero
- Press the ON/OFF key.
- The display will show “PAA”.
- Insert the ZERO ampoule (supplied in Vacu-vials®1 kit), flat end first, into the sample cell compartment (with mild downward pressure), making sure that it is fully seated.
- Place the light shield over the ZERO ampoule.
- Press the Zero/Test key. The “PAA” symbol will flash for approximately 8 seconds, then the display will show “0.0.0”.
To Make a Measurement
- Follow the Test Procedure in the Peracetic Acid Vacu-vials test kit (Cat. # K-7913).
- Insert the resulting Peracetic Acid Vacu-vial ampoule, flat end first, into the sample cell compartment (with mild downward pressure), making sure that it is fully seated.
- Place the light shield over the test ampoule.
- Press the Zero/Test key. The “PAA” symbol will flash for approximately 3 seconds, then the sample test result will appear in the display as ppm (mg/Liter).
Operating Tips
- Upon startup, the photometer automatically proceeds to the zeroing process. Every time the photometer powers on, it must be re-zeroed.
- To re-zero the photometer, it must be turned off and back on again.
- A series of readings can be taken without re-zeroing, as long as the photometer stays on during the series.
- Protect photometer from extreme humidity, corrosive fumes and dusty areas. Store in a cool, dry place.
- Remove the batteries when photometer is not in use.
- Press the ! key to turn the display back light on or off.
- When moving the photometer from one temperature extreme to another, wait at least 10 minutes before use to allow photometer to come to temperature equilibrium.
- Contamination of the optics in the sample chamber will result in incorrect measurements. The windows in the sample chamber should be checked at regular intervals and cleaned as necessary. Use a soft moist cloth or cotton swab for cleaning purposes.
- If the sample cell adapter has been removed, it must be replaced with proper orientation, aligning the triangle on the adapter with the triangle on the photometer.
- The SAM calibration is factory set and the LED should not change under normal use conditions. However, it is good quality protocol to routinely verify the performance of any LED photometer. A verification kit (Cat. No I-0003) that can be used to verify the performance of this photometer is sold separately.
Displays and Troubleshooting
E01: Light absorption too great (dirty optics)
E020 or E021: Too much light reaching detector
E022 or Battery Icon: Battery should be replaced
E027, E028 or E029 : Instrument zeroed incorrectly, misaligned adapter,
vial not fully seated, dirty optics or failing light source.
Hi or E03: Measuring range exceeded or excessive turbidity
Lo: Test result has a negative value (less than 0 ppm) or vial not fully
seated.
Battery Installation
To ensure that the instrument is waterproof:
- seal ring (A) must be in position
- battery compartment cover (B) must be fixed with the four screws
Specifications
Auto Shutoff: After 15 minutes of non-use
Optics: 530 nm LED/interference filter and photosensor in transparent
sample chamber
Operating Temp. : 5 to 40°C (41 to 104°F)
Battery: 4 AAA batteries (approx. 5,000 tests or 17 hours)
Waterproof: Floating, IP68 (1 hour at 0.1 meter)
Wavelength Accuracy: ± 1 nm
Photometric Accuracy: 3% full scale (T = 20 – 25° C / 68 – 77° F)
Photometric Resolution: 0.01 A
Ambient Conditions: Temperature 5 – 40° C / 41 – 104° F
Rel. humidity 30 – 90 % (non-condensing)
CE: Certificate of Declaration of CE-Conformity available upon request.
Menu Selection
Setting Date and Time
Upon initial start-up, the SAM will display “Set”, “dAtE”, and “YYYY”, then a
4 digit number. Proceed to Step 4 in the procedure below to set the date and
time, or power the instrument off and on again to bypass this process. At any
time that the time and/or data need to be reset, follow steps 1-6 of the
procedure below.
- Press the Mode key and hold. Turn the instrument on by pressing and releasing the ON/OFF key. Once three decimal points appear in the display, release the Mode key. The display will show “di 5”.
- Press and release the ! key until the display shows arrows in the upper right and lower left corners of the display, pointing to “Time” and “Date”.
- Press the Mode key. “Set”, “dAtE” will briefly appear in the display.
- Date and time settings are displayed in the following order: Year (“YYYY”), Month (“MM”), Day (“dd”), Hour (“hh”), Minutes (“mm”). Increase the displayed value for each setting by pressing the Mode key or decrease the value by pressing the Zero/Test key until the desired value is displayed.
- Press the ! key to save the displayed value and to proceed to the next setting.
- After setting the minutes, press the ! key. The display will flash “is” “SEt” and then will return to the measurement mode.
Recall of Stored Data
The SAM photometer automatically stores the last 15 data sets. To recall
stored data:
-
Press the Mode key and hold. Turn the instrument on by pressing and releasing the ON/OFF key. Once three decimal points appear in the display, release the Mode key. The display will show “di 5”.
Note: If the instrument is already on, press and hold the ! key for at least 4 seconds and release to access the stored data. -
Press the Mode key. The photometer will display the stored data sets in the following format:
a. Sample Number: nXX (e.g. n15, n14, … n1)
b. Year: XXXX (e.g. 2017)
c. Date: mm.dd (e.g. 03.15)
d. Time: hh.mm (e.g. 12:05)
e. Analyte
f. Result -
Press the Zero/Test key to repeat the current data set.
-
Press the Mode key to proceed to the next data set.
-
Press the ! key to return to the measurement mode.
1. Vacu-vials is a registered trademark of CHEMetrics, LLC U.S. Patent No. 3,634,038
Peracetic Acid – DPD Method
Applications and Industries
Wastewater, Seawater
Food & Beverage and Pulp and Paper industries
References
APHA Standard Methods Online, Method 4500-PAA – 2019
Chemistry
Sample is treated with an excess of potassium iodide.
Peracetic acid (PAA) oxidizes iodide to iodine, and the iodine then oxidizes
DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct
proportion to the peracetic acid concentration. Results are expressed as ppm
(mg/L) peracetic acid (PAA).
The DPD chemistry can be used to determine the concentration of Total Residual Oxidizers (TRO) in seawater.
Available Analysis Systems
Visual colorimetric: CHEMets®, VACUettes®
Instrumental colorimetric: Vacu-vials®
Storage Requirements
Products should be stored in the dark and at room temperature.
Shelf Life
When stored in the dark and at room temperature:
Visual colorimetric:
CHEMets and VACUettes refills, Activator Solution, color comparators: at least
1 year
Instrumental colorimetric:
Vacu-vials kit: at least 1 year
Accuracy Statement
Statements of accuracy are based on laboratory tests performed under ideal
testing conditions using standards of known concentration prepared in
deionized water.
CHEMets and VACUettes kits: ± 1 color standard increment
Vacu-vials kit:
≤0.10 ppm at 0 ppm
±0.12 ppm at 0.40 ppm
±0.25 ppm at 1.25 ppm
±0.38 ppm at 3.75 ppm
Interference Information
- The following additional oxidizers are measured quantitatively during analysis: total chlorine, total bromine, total iodine, ozone, permanganate, chlorine dioxide, and performic acid.
- When using the PAA test kits to determine performic acid (PFA) concentration, multiply test results by 0.82 to convert to ppm PFA.
- Peracetic acid itself and other oxidizers at concentrations significantly above the test range may prevent proper color development, causing a false low result.
- Hydrogen peroxide at concentrations up to approximately 10 ppm does not interfere with the test at 1 minute of color development.
- Persulfate up to approximately 1.5 ppm is not expected to interfere at 1 minute of color development. Beyond 1 minute or at higher concentrations, persulfate may interfere positively.
- Sample pHs between 2.5 and 10 are tolerated with this chemistry. However, PAA decomposition rates due to hydrolysis increase in solutions at pHs above 8.2. Samples with extreme pHs or that are highly buffered should be adjusted to approximately pH 6 – 7 prior to analysis.
- Ferric iron can be tolerated at concentrations up to 10 ppm.
- Cupric copper up to 10 ppm does not interfere.
- Manganese (II), Mn+2, at up to at least 100 ppm does not interfere.
- Nitrite up to at least 5 ppm does not interfere.
- Chromate may interfere.
- Sample color or turbidity may make a color match difficult during visual colorimetric testing and may cause a false positive result with instrumental colorimetric tests. CHEMetrics’ Sample Zeroing Accessory Pack can be used to correct for potential errors during instrumental analysis.
Safety Information
Safety Data Sheets (SDS) are available upon request and at www.chemetrics.com.
Read SDS before using these products. Breaking the tip of an ampoule in air
rather than water may cause the glass ampoule to shatter. Wear safety glasses
and protective gloves.
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May 23, Rev. 7
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