{"id":363982,"date":"2024-10-20T01:48:27","date_gmt":"2024-10-20T01:48:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-21-30396472-dc\/"},"modified":"2024-10-26T02:51:11","modified_gmt":"2024-10-26T02:51:11","slug":"bsi-21-30396472-dc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-21-30396472-dc\/","title":{"rendered":"BSI 21\/30396472 DC"},"content":{"rendered":"<p>This document specifies a method for the determination of ammonium nitrogen (NH<sub>4<\/sub>-N) in drinking water, groundwater, surface water, wastewater, bathing water and mineral water using the small-scale sealed tube method. The result can be expressed as NH<sub>4<\/sub> or NH<sub>3<\/sub> or NH<sub>3<\/sub> or NH<sub>3<\/sub>-N.<\/p>\n<p>This method is applicable to (NH<sub>4<\/sub>-N) concentration ranges from 0,01&nbsp;mg\/l to 1&nbsp;800&nbsp;mg\/l of NH<sub>4<\/sub>-N. The measuring ranges of concentration can vary depending on the type of small-scale sealed tube method of different manufacturers. Concentrations even slightly higher than the upper limit indicated in the manufacturers manual relating to the small-scale sealed tube method used, cannot be reported as accurate results. Appropriate preliminary dilution of the sample shall be performed or a small-scale sealed-tube method with a different application measuring range shall be used.<\/p>\n<p>All manufacturers&#8217; methods are based on the Berthelot reaction and its modifications to develop indophenol blue colour. Reagents mixtures could differ slightly based on manufacturers small-scale sealed tube method, see <span class=\"xref\">Clause&nbsp;8<\/span>. This method is applicable to direct determination of samples by using small-scale sealed tubes for the determination of drinking water, groundwater, surface water, wastewater and on preserved samples. The method is applicable after separation of suspended materials by filtration.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>BS ISO 23695. Water quality. Determination of ammonium nitrogen in water. Small-scale sealed tube method<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2021<\/td>\n<td>18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":363989,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[216,2641],"product_tag":[],"class_list":{"0":"post-363982","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-060-50","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/363982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/363989"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=363982"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=363982"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=363982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}