{"id":456,"date":"2024-10-01T13:13:26","date_gmt":"2024-10-01T13:13:26","guid":{"rendered":"http:\/\/castco.wpenginepowered.com\/?post_type=ht_kb&p=456"},"modified":"2024-12-06T17:39:58","modified_gmt":"2024-12-06T17:39:58","slug":"kyoritsu-packtest-phosphate-low-range","status":"publish","type":"ht_kb","link":"https:\/\/castco.org\/knowledge-base\/kyoritsu-packtest-phosphate-low-range\/","title":{"rendered":"Method audit: Phosphate Phosphorus \u2013 Kyoritsu Packtest"},"content":{"rendered":"\n
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Overview of the Kyoritsu Packtest \u2013 Phosphate Phosphorus (low range)<\/h3>\n\n\n\n

Kyoritsu PACKTEST low-range phosphate test tubes measure the phosphate levels in a water sample. They are supplied directly from Japan in boxes of 40 tubes, so they need to be bought in relatively large volumes. The user must first remove a small plastic pin from the tube to open a small aperture, then squeeze the tube to expel the air, invert the tube, immerse it in the sample and then release the tube to draw in the sample. Then, wait 5 minutes for the colour change to develop. The optional PACKTEST square cup can be used to ensure a consistent sample volume. Due to the need to estimate which colour the sample matches, this method is considered semi-quantitative.<\/p>\n\n\n\n

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Suitability for monitoring purposes<\/h3>\n\n\n\n
Monitoring purpose category<\/strong><\/td>Likely Tier(s)<\/strong><\/td>Suitability<\/strong><\/td><\/tr>
Engagement: Education and raising awareness<\/td>0-1<\/td>\u2713<\/td><\/tr>
Surveillance: Ecosystem health screening<\/td>1 (2)<\/td>\u2713<\/td><\/tr>
Investigation: Helping to target further action<\/td>2 (3)<\/td>\u2716<\/td><\/tr>
Evaluation: Assessing the impact of actions<\/td>2 (3)<\/td>\u2716<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Details: <\/strong>Measures phosphate in the range 0 \u2013 2 mg\/L as PO4<\/sub> (0.05, 0.1, 0.2, 0.5, 1 and 2 mg\/L) and 0 \u2013 1mg\/L as P 0.02, 0.05, 0.1, 0.2, 0.5, 1 mg\/L). Different colour charts are given for P vs PO4<\/sub> \u2013 so ensure the correct one is used. Accuracy is not stated but assumed to be +\/1 half a \u2018step.\u2019<\/p>\n\n\n\n

Data system: <\/strong>N\/A. Results are not stored on a device, so the user must record and store them.<\/p>\n\n\n\n

Cost<\/strong>: VERY LOW. Around \u00a350 for a box of 40 tests (c. \u00a31.25\/test) \u2013 bulk discounts are available, but import duty and shipping costs are extra.<\/p>\n\n\n\n

Ease of use:<\/strong> EASY. Reagents are contained in each capsule so users do not come into direct contact with them.<\/p>\n\n\n\n

Quality control: <\/strong>Local coordinators are responsible for quality control. Measurement is likely affected by extremes of temperature and highly coloured samples.<\/p>\n\n\n\n

Coverage \/ scale: Can be used anywhere \u2013 currently used internationally by Freshwater Watch and Water Rangers<\/p>\n\n\n\n

Health & safety: <\/strong>No known issues; users should not come into contact with reagent or reacted sample.<\/p>\n\n\n\n

Case studies featuring this method<\/strong>: Earthwatch: Great UK Waterblitz\u00a0<\/a><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Overview of the Kyoritsu Packtest \u2013 Phosphate Phosphorus (low range) Kyoritsu PACKTEST low-range phosphate test tubes measure the phosphate levels in a water sample. 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