{"id":465003,"date":"2024-10-20T10:38:11","date_gmt":"2024-10-20T10:38:11","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-178992024\/"},"modified":"2024-10-26T19:37:24","modified_gmt":"2024-10-26T19:37:24","slug":"bs-en-178992024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-178992024\/","title":{"rendered":"BS EN 17899:2024"},"content":{"rendered":"

This document describes a spectrophotometric method for determining the chlorophyll-a content corrected for phaeopigments as a measure of the amount of phytoplankton for all types of surface water including marine water. The determination limit is usually 2 \u00b5g\/l to 5 \u00b5g\/l and is calculated by each laboratory individually. It can be as low as 0,5 \u00b5g\/l using 2 l of sample (or even more) and a 50 mm cuvette. NOTE In some measurement programs like marine studies on time series data and ecological status\/classification no correction for phaeopigments is used and acidification is omitted, e.g. as recommended by OSPAR.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
8<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
9<\/td>\n4 Principle
5 Interferences
6 Reagents <\/td>\n<\/tr>\n
10<\/td>\n7 Apparatus <\/td>\n<\/tr>\n
11<\/td>\n8 Procedure
8.1 General
8.2 Sample pre-treatment
8.3 Filtration
8.4 Extraction <\/td>\n<\/tr>\n
12<\/td>\n8.5 Measurement
9 Quality assurance
9.1 Blank values
9.2 pH after acidification
9.3 Wavelength setting <\/td>\n<\/tr>\n
13<\/td>\n9.4 Ratio A\/A’
10 Calculations <\/td>\n<\/tr>\n
14<\/td>\n11 Expression of results
12 Test report <\/td>\n<\/tr>\n
15<\/td>\nAnnex A (informative)Performance data
A.1 Interlaboratory trial study in the Netherlands:
A.2 Validation interlaboratory trial in Germany: <\/td>\n<\/tr>\n
18<\/td>\nAnnex B (informative)Theoretical backgrounds
B.1 Meaning of the determination of the chlorophyll-a content
B.2 Acidifying extracts
B.3 Calculation of Phaeopigment concentration <\/td>\n<\/tr>\n
19<\/td>\nAnnex C (informative)Control samples
C.1 Introduction
C.2 Surface water
C.3 Frozen spinach extracts
C.4 Freeze-dried kale <\/td>\n<\/tr>\n
20<\/td>\nC.5 Algae culture <\/td>\n<\/tr>\n
21<\/td>\nAnnex D (informative)SCOR-Unesco method for determination of chlorophyll in sea-water
D.1 Measurement of chlorophyll a, b, c and d with SCOR-Unesco method using chromatic equations <\/td>\n<\/tr>\n
22<\/td>\nD.2 Performance characteristics and comparison of methods
D.2.1 Validation study in France <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Water quality. Spectrophotometric determination of chlorophyll-a content by ethanol extraction for the routine monitoring of water quality<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2024<\/td>\n24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":465010,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[218,2641],"product_tag":[],"class_list":{"0":"post-465003","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-060-70","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\/465003","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\/465010"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=465003"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=465003"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=465003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}