kobo glo e-Reader User Guide
- June 17, 2024
- kobo
Table of Contents
kobo glo e-Reader
Information on the performance characteristics of our kits can be found at www.epa.gov/etv/verifications/-verification- index.html, or call ITS at 803-329-9712 for a copy of the ETV verification report. The use of the ETV® Name or Logo does not imply approval or certification of this product nor does it make any explicit or implied warranties or guarantees as to product performance.
WARNING: Hydrogen Arsine gases are gest.enerated during the t Work in a well-ventilated area away from open flames and other sources of ignition. Review the Material Safety Data Sheet before handling any chemicals.
Industrial Test Systems, Inc.
Do not store kit in direct sunlight or above 90°F/32°C.
481298-INST
Revision: 09/02/20
ABOUT KIT # 481298:
Part Number: 481298, 300 Tests
This test detects total inorganic Arsenic (As+3 and As+5)
This Arsenic Test Kit provides a safe, simple, and reliable way to test for
Arsenic from 0 to 1000μg/L (up to 5000μg/L when using 1/5 dilution method).
Follow the instructions carefully to get reliable results. All components are
supplied in the kit except for a timer and thermometer. This test tolerates up
to 2 mg/L Hydrogen Sulfide without interference. No interference was found for
this test kit for Antimony up to 0.5mg/L. No interference from Iron or Sulfate
was found. It is recommended that the water sample be 22°C to 28°C (72°F to
82°F). The color chart was standardized at 25°C (77°F). For best results,
record the temperature at which the sample was run. Use all reagents and test
strips within the allowed shelf life as marked on each container.
Kit Components
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2 Reaction Bottles, clear PVC, with 10ml (lower) and 50ml (upper) lines
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2 White Caps, with white turret, for holding test strip
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3 Plastic Spoons (one large pink spoon- 1.25cc for First Reagent; one smaller red spoon- 0.15cc for Second Reagent; and one smaller white spoon 0.15cc for Third Reagent)
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1 Large Bottle of First Reagent (395 gm)
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1 Bottle of Second Reagent (78 gm)
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1 Bottle of Third Reagent (140 gm)
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3 Bottles of Arsenic Test Strips (300 total) with waterproof color chart label – Caution: Each test strip pad contains about 1mg Mercuric Bromide (HgBr2)
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This Instruction Booklet
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Plastic Bag for Used Test Strips (Not pictured)
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2 Yellow Caps for mixing
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Plastic Case for Components
Options: -
Thermometer – mercury free (US $3.99 each – sold separately, Order # 481196-T)
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Stopwatch (US $14.99 each – sold separately, Order # 481660)
About the Patented Reaction (Modified Gutzeit method):
Inorganic Arsenic compounds in the water sample are converted to Arsine (AsH3)
gas by the reaction of Zinc Dust and Tartaric Acid. Ferrous and Nickel salts
have been added to accelerate this reaction. The Arsine reacts with the
Mercuric Bromide on the test strip to form mixed Mercury halogens (such as
AsH2HgBr) that appear with a color change from white to yellow or brown.
Potassium Peroxymonosulfate (second reagent) is added to oxidize Hydrogen
Sulfide to Sulfate.
PRECAUTIONS: Hydrogen gas and Arsine gas are generated during the reaction.
Work in a well-ventilated area away from fire and other sources of ignition.
All reagents are unsuitable for human consumption and must be kept away from
children and pets.
US Patent # 6696300
BEST ACCURACY & TROUBLESHOOTING
- Perform a “practice run” of the test to familiarize yourself with all of the procedures and color matching to ensure accurate testing results. To gain confidence in using this test kit for unknown samples, it is highly recommended that you use the kit on a sample with a known inorganic Arsenic concentration, or with a sample that has been prepared using an Arsenic standard. Run the test in duplicate for better accuracy.
- Run the test within 24 hours of collecting a fresh water sample. The water sample must not be preserved with Nitric Acid or any other preservation method as it will interfere with the test results. The water sample should also not contain any significant amount of buffers. If you are planning to send a duplicate sample for ICP laboratory verification, follow preservation requirements for that sample only.
- Best test results are obtained when the water and room temperature are 22° – 28°C (72° – 82°F). The color chart is calibrated at 25°C/77°F. Cold and Warm water will cause low readings resulting in a false low reading. When the water is cold, make sure to warm the water sample to proper range prior to testing (using a microwave is acceptable). If the water temperature is above 28°C your result may read low (accelerator chemistry reacts too fast). Consideration must also be made for the air temperature when running the test.
- Wash the reaction bottle with clean tap water before and after each test. When the reagents are allowed to sit in the bottle after the test, Reagent 3 may begin to adhere to the bottom of the bottle and will require more advanced cleaning with a bottlebrush.
- Careful color matching for best result. As reflected in the color chart, the border color differs from the inside color of the test strip, this is normal. In some cases, an exact color match will not be available. Do not estimate a value not on the color chart. First, identify the color block closest to the pad color. It is customary to add a plus (+) or a minus (-) to the recorded result; if the pad color is darker than the color block report the result as “color block value” (+) or if the pad color is lighter report the result “color block value” (-). For example, the pad color is slightly lighter than the 10 color block. Record Result as 10- (ppb)
- Do not use components from other kits. Interchanging components will result in inaccurate results since each kit since the test kits are calibrated with all components.
| Problem | Possible Causes/Solutions |
|---|---|
| Low or no color development on reaction pad after 10 minute reaction time. | 1. |
Incorrect temperature sample. Proper range 22°C-28°C (72°F-82°F)
2. The strip may not have been inserted correctly (see image 6). Run test again.
3. Correct amount of reagents may not have been added. Run test again.
4. The reaction cap may have been loose. Run test again.
5. The sample may contain organic arsenic or the arsenic is bound. Kit only tests for soluble inorganic arsenic.
6. Interference due to elevated nitrate, nitrite, or Lead in water sample.
7. Test strip pad is very wet, which inhibits colorimetric reaction. Moist pad at end of test is normal.
Color on the pad suggests more arsenic is present than expecte
OR
Pad is darker than color chart.
| 1. Possible interference, check for sulfide. If hydrogen sulfide is confirmed, allow sample to sit at room temperature, exposed to airfor up to 8 hours (typically 50% of the hydrogen sulfide gas is dissipated every 8 hours).
2. Dilute sample 1:5 and run test again to bring results within range (see NOTE on page 4).
Little or no Hydrogen gas bubbles occur after Reagent 3 addition.| 1. Addition of Reagent 1 could have been omitted, run test again.
2. Excess oil and grease will hinder or suppress rate of gassing, dilute sample and run test again.
3. Strong acid may be present in sample as a preservative or from sample source because of where and how the sample was collected. Strong acids interfere with test.
4. pH of water sample is too alkali.
WARNING: Hydrogen and Arsine gases are generated during the test. Work in a well-ventilated area away from open flames and other sources of ignition. Review the Material Safety Data Sheet before handling any chemicals.
TEST PROCEDURE
FOLLOW CAREFULLY FOR BEST RESULTS
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For best results, the water temperature should be 22°C to 28°C (72°F to 82°F). Use a thermometer to verify the temperature of the sample.
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To the Reaction Bottle, slowly add the water sample to the upper marked line on the bottle (50 mL).
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Add 1 level pink spoon of First Reagent to the Reaction Bottle. Cap securely with the yellow cap and shake vigorously, with bottle upright, for 15 seconds.
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Uncap the Reaction Bottle and add 1 level red spoon of the Second Reagent. Recap securely with the yellow cap and shake vigorously, with bottle upright, for 15 seconds.
NOTE: To minimize H2S interference, allow the sample to sit for 2 minutes before performing Step 5. -
Uncap the Reaction Bottle and add 1 level white spoon of Third Reagent. Cap securely with yellow cap and shake vigorously with bottle upright for 5 seconds.
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Immediately uncap and recap securely using the white turret cap. Turret cap must be dry.*
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Remove one Arsenic test strip from its bottle (immediately recap the test strip bottle). Insert the test strip into the turret as illustrated in Figure A:
- a) Position the strip so that the test pad and red line are facing the back of the white cap (see Figure 1).
- b) Insert the strip into the turret until the red line is even with the top of the turret, and now close (flip down) the turret. This will hold the test strip in place.
- c) Allow the reaction to occur in an undisturbed, well-ventilated area.
(NOTE: the test strip must be inserted and oriented correctly, and to the correct depth, in order for the results to be accurate).
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Wait 10 minutes.
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After the 10 minute wait (no longer than 12 minutes), pull up the turret and carefully remove the test strip (do not let it fall into the bottle liquid). Use the Arsenic Test Kit Color Chart label to match the test strip pad color within the next 30 seconds (colors oxidize when exposed to light). For best color matching, use natural daylight, but not direct sunlight.
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Record your results.
*(Mercuric Bromide strips (Arsenic test strips) will not react with arsine gas if they are wet!)
NOTE: For best accuracy above 500μg/L dilute the sample 1 to 5 and repeat the test as follows: fill the reaction bottle to the bottom line with the sample to be tested. Add arsenic-free water to the top line (50mL) of the bottle and then run steps 2 to 9. Multiply the result by 5 to determine the actual arsenic value and record your result.
ATTENTION: After testing is completed, pour the reacted liquid down a drain not used for food preparation, and flush well with water. Rinse the bottle, yellow cap, and white turret cap with clean water. Shake off excess water from the caps: it is important that the White Turret Caps are dry before the next test. Store used test strips in a plastic bag marked “Used Mercuric Bromide (HgBr2) Test Strips”. Keep used test strips away from children and pets, and dispose according to local environmental regulations.
WARNING: Hydrogen and Arsine gases are generated during the test.
Work in a well-ventilated area away from open flames and other sources of
ignition. Review the Material Safety Data Sheet before handling any chemicals.
SDS 1
Safety Data Sheet
SDS 2
Safety Data Sheet
SDS 3
Safety Data Sheet
SDS 4
Safety Data Sheet
Our products are compliant with all 49CFR and IATA rules and regulations.
LETTER FROM THE KIT INVENTOR
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Thank you for purchasing our U.S. Patented Arsenic Econo Quick™ Kit. Our company has trademarked the kits Quick™ because of the short 14 minute time for analysis.
-
The Drinking Water standard of the US EPA and the World Health Organization (WHO) allows a maximum contaminant level of 10 ppb (μg/L) for Arsenic. The old US EPA level of 50 ppb (μg/L) remains as the maximum contaminant level for many countries in the world.
-
For several years, Industrial Test Systems, Inc. (ITS) committed to a major research and development effort to provide better and safer arsenic test kits. For these efforts US Patent# 6696300 was granted for the acceleration of arsenic detection through the addition of iron and nickel salts. This innovation permits arsenic field tests to be completed in less time. The test was made safer by using tartaric acid, instead of liquid acids, for the reduction of inorganic arsenic (As+3/As+5) to arsine gas. The Quick™ II series of kits use a modified turret/aperture cap, allowing detection of arsenic below 5ppb (μg//L). The reduction reactions utilized in all kits are as follows:
Zn + 2H+ → Zn+2 + H2 (gas) and As4O6 + 12 Zn +24H+ → 4AsH3(gas) + 12 Zn+2 + 6H2O (pH 1.6) -
The analysis is performed in a closed reaction bottle (plastic) with an appropriate volume of sample (50 to 500 ml). After the 10 minute reduction reaction, the mercuric bromide strip or testing pad is removed and matched to the color chart or color analyzed by the Quick™ Arsenic Scan instrument. A light yellow to brown color change indicates that arsenic is present. The color intensity is proportionately related to the concentration of arsenic in the sample. NOTE:
-
ITS test kits detect free inorganic arsenic only. ICP-MS methods detect inorganic and organic arsenic. If organic arsenic is present, ITS kit results can be expected to give lower values when compared to ICP-MS results.
Inorganic Arsenic Kits Available
US Patent # 6696300
PRODUCT NAME (PART NUMBER)| OPTIMUM **RANGE***
ppb (μg/L)
| TYPICAL COLOR CHART DETECTION LEVELS
ppb (μg/L)
| TYPICAL ACCURACY** USING QUICK™ ARSENIC SCAN| # OF
TESTS
---|---|---|---|---
Arsenic Quick™
(481396)
| 10 to 200| 0, 5, 10, 20, 60, 100, 300, 500,
500, >>500
| +/-18 ppb or +/-30%| 100
Arsenic Quick™ II
(481303)
| 3 to 20| <1, 2, 3, 4, 5, 6, 7, 8, 10, 13, 20,
25, 30, 40, >50, >80, >120, >160
| +/-1.2 ppb or +/-16%| 50
Arsenic Low Range Quick™ II
(481301)
| 1 to 10| <0.5, 1, 1.5, 2, 3, 4, 5, 6,
7, 8, 12, >20, >30, >50
| +/-0.8 ppb or +/-14%| 50
Arsenic Ultra-Low Quick™ II
(481300)
| 0.5 to 6| 0,0.3,0.7, 1.0, 1.5, 2, 2.5, 3,
3.5, 4, 5, 6, 8, 10, 13, 20, >20
| +/-0.4 ppb or +/-12%| 25
Quick™ Arsenic Scan Instrument
(481305)
| —| 0.01 to >1.00 color density ppb (μg/L)
(as low as 0.2 ppb (μg/L) arsenic)
| (see above)| _
Information on the performance characteristics of Quick™ can be found at www.epa.gov/etv. The use of the ETV® Name or Logo does not imply approval or certification of this product nor does it make any explicit or implied warranties or guarantees as to product performance.
** As with any test, actual results will fall within a range around the actual value. The Typical Accuracy listed is from data generated by a technician in our lab using the Quick ™ Arsenic Scan instrument measuring interference-free aqueous arsenic standards. Kit expected accuracy is the larger of the two values listed. {Example using Quick™: If the mean is 40 ppb, then the typical accuracy is +/-18 ppb which is larger than +/-12 ppb (40 ppb X 30%)}.
Cordially yours,
Ivars Jaunakais, Analytical Chemist
[email protected]