{"id":8959,"date":"2023-12-01T17:16:27","date_gmt":"2023-12-01T07:16:27","guid":{"rendered":"https:\/\/symbiolabs.com.au\/?p=8959"},"modified":"2024-01-17T16:29:37","modified_gmt":"2024-01-17T06:29:37","slug":"residue-testing-in-grain","status":"publish","type":"post","link":"https:\/\/symbiolabs.com.au\/residue-testing-in-grain\/","title":{"rendered":"Residue Testing in Grain"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"8959\" class=\"elementor elementor-8959\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1dd6d1e e-flex e-con-boxed e-con e-parent\" data-id=\"1dd6d1e\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-936eeb8 elementor-widget elementor-widget-text-editor\" data-id=\"936eeb8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>Residue testing in grain looks at Organochlorines (OC), Organophosphates (OP) and Synthetic Pyrethroids (SP) which are chemical compounds that are used as insecticides. Organochlorines are a risk becaus<img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-8961 alignright\" src=\"https:\/\/symbiolabs.com.au\/wp-content\/uploads\/2023\/12\/residue-testing-in-grain-300x225.webp\" alt=\"grain residue testing\" width=\"300\" height=\"225\" srcset=\"https:\/\/symbiolabs.com.au\/wp-content\/uploads\/2023\/12\/residue-testing-in-grain-300x225.webp 300w, https:\/\/symbiolabs.com.au\/wp-content\/uploads\/2023\/12\/residue-testing-in-grain.webp 400w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>e they persist in the environment and the fat of animals, thus posing a potential risk to public health. The chemical is concentrated in the fat of animals and the leaner the animal, the higher the level of concentration.<\/p><p>The Maximum Residue Limits (MRLs) of OC\u2019s in stockfeed is determined by consideration of this magnification of the residue. A significant proportion of contamination of animals with OC\u2019s is derived from consumption of contaminated soil. There have been many instances of contamination of stored grains and forages with OC\u2019s from timber treated with DDT.<\/p><p>It is not practical to use laboratory testing to determine the residue status of materials that have an unknown origin or treatment history. Usually testing will involve testing for presence of Organochlorine, organophosphorus (OP) type pesticides, Synthetic Pyrethroids (SP) Chlorfluazuron and others. An example of an OC, OP and SP residue test output is shown below:<\/p><p>Most OC detections in grain are related to soil contamination and diligence in reporting and testing has resulted in a reduced incidence of positive results while demand for testing for OP (organophosphorus), SP (synthetic pyrethroids) and fungicides has increased.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9949c84 elementor-widget elementor-widget-heading\" data-id=\"9949c84\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Some other definitions used in the laboratory analysis:<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2884a8c elementor-widget elementor-widget-heading\" data-id=\"2884a8c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">MRL (maximum residue limit)<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-34e6a67 elementor-widget elementor-widget-text-editor\" data-id=\"34e6a67\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The maximum residue limit is defined as the maximum concentration of a residue that is legally permitted or recognized as acceptable in or on a food, agricultural commodity or animal feed.\u00a0 It results from the officially authorised safe use of an agricultural or veterinary (agvet) chemical.\u00a0 The concentration is expressed in mg\/kg (milligrams per kilogram or parts per million) of the commodity.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7aaee2 elementor-widget elementor-widget-heading\" data-id=\"e7aaee2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">LOR (limit of reporting)<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1aef68b elementor-widget elementor-widget-text-editor\" data-id=\"1aef68b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The limit of reporting is the minimum concentration (mg\/kg) of a residue used for reporting purposes.\u00a0 A report would include a statement \u201cResults of analyses lower than the LOR are not included in this report\u201d.\u00a0Each report is accompanied by a Chemical List that identifies each chemical and its respective LOR included in the assay. A result of \u201c<strong>LOD (limit of detection)<\/strong><\/p><p>LOD is also referred to as lowest detectable limit and is the lowest concentration of an analyte at which positive identification can be determined.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-258f969 elementor-widget elementor-widget-heading\" data-id=\"258f969\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What are the reporting requirements with respect to LODs and LORs for National Residue Survey (NRS) Contract Laboratories?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d237c2 elementor-widget elementor-widget-text-editor\" data-id=\"1d237c2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul><li>A contract laboratory should report to NRS quantitative results for analytes detected at concentrations above the laboratory\u2019s method LORs, irrespective of the level at which the NRS specified LORs are set.<\/li><li>In the case where an analyte is detected at a concentration between the method\u2019s LOD and the method\u2019s LOR the result should be reported as a \u2018trace\u2019 and entered into the database as (-1) against the relevant NRS chemical code.<\/li><li>If neither of the above apply for an analyte included in a test done for the NRS, the laboratory should enter nothing against that analyte in the report.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-748da2f elementor-widget elementor-widget-heading\" data-id=\"748da2f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What influences accuracy of the test result?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc71bed elementor-widget elementor-widget-heading\" data-id=\"cc71bed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Sampling<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a72104b elementor-widget elementor-widget-text-editor\" data-id=\"a72104b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The analysis result is only as good as the sample submitted. Taking a good, representative sample of the feedstuff being submitted is the most critical step in determining the accuracy of the final result. A sample needs to accurately reflect the nutritional\/residue status of the total batch which maybe several tonnes.<\/p><p>The sample submitted to the laboratory must be a composite sub-sample from 12-20 samples taken across the product. A second sample should be kept on farm as a retention sample. The following provides a brief summary of sampling procedures depending on the target feedstuff and analysis being performed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b6b19ee elementor-widget elementor-widget-heading\" data-id=\"b6b19ee\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Grains and ingredients<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aaccb28 elementor-widget elementor-widget-text-editor\" data-id=\"aaccb28\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Ideally a grain probe should be used to collect 12 \u2013 20 random samples as grain is discharged or from various sites in flat bed storage. These should be combined in a clean plastic bucket and blended. Four sub-samples should be taken from the bucket with approx 250 grams taken from each to form the final sample for submission to the laboratory.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e8b060 elementor-widget elementor-widget-heading\" data-id=\"5e8b060\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Total mixed rations<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6225b08 elementor-widget elementor-widget-text-editor\" data-id=\"6225b08\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Collect only freshly blended rations. Grab12 \u2013 20 handfuls of the mix from different locations across the feed bunk or in front of 12 \u2013 20 animals. It is important to ensure that samples are taken through the mix \u2013 not just from the top few cms to ensure that the lesser particle size material which may have separated out is included in the sample. Once 12 \u2013 20 samples have been collected, they should be blended in a bucket and sub-sampled as above to obtain the final sample.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3fd956 elementor-widget elementor-widget-heading\" data-id=\"d3fd956\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Silage<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fbe3bc elementor-widget elementor-widget-text-editor\" data-id=\"5fbe3bc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Collect only freshly unloaded material. Grab 12 \u2013 20 samples from random locations across the unloaded pile or feed bunk. For bunker or trench silos, obtain 12 \u2013 20 samples across the freshly exposed face of the load. Sampling locations should vary from top to bottom and left to right. Combine, blend and sub-sample as suggested above.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b16d94 elementor-widget elementor-widget-heading\" data-id=\"6b16d94\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Hay<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8278d19 elementor-widget elementor-widget-text-editor\" data-id=\"8278d19\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A core sampler or hay probe will always provide a more representative sample of the total load than will taking samples by hand. Again, 12 \u2013 20 samples should be collected randomly across the whole load.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0bc8617 elementor-widget elementor-widget-heading\" data-id=\"0bc8617\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Samples for Residue Testing<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b465ba7 elementor-widget elementor-widget-text-editor\" data-id=\"b465ba7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Delays in submission of sample for residue testing can affect the validity of the result. Biological activity and deterioration of specimens can occur either during storage or transport. Bacteria may die as samples dry, pesticides and antibiotics may break down. For this reason, it is important to submit samples without delay and contact the laboratory for assistance with regard to sample submission.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19440f4 elementor-widget elementor-widget-heading\" data-id=\"19440f4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Recording of a sample<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-586b3e5 elementor-widget elementor-widget-text-editor\" data-id=\"586b3e5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Grain and feed samples should be kept in an airtight container or bag in a cool, dry place, away from direct sunlight. Clearly label the sample with the following information:<\/p><ul><li>Assign a sample number. May include reference to number of samples submitted that day i.e. 1 of 5. The sample number should be recorded on farm against name of supplier and\/or delivery docket, invoice number if a purchased grain sample. For purchased feed samples, the sample number would be recorded against invoice number or batch number for bagged feeds\/concentrates.<\/li><li>Customer or business name<\/li><li>Name of feed<\/li><li>Date sample taken<\/li><li>Tests required. This information should be repeated on the analysis request form which would prompt for sample description (in this case a number and name), test and perhaps method code. The latter code may already appear on the request form.<\/li><\/ul><p>\u00a0<\/p><p>An analysis request form should always accompany the samples. These can be obtained from the testing laboratory along with sample bags if required.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce2ebf1 elementor-widget elementor-widget-heading\" data-id=\"ce2ebf1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Grain Residue TEsting at Symbio<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f1320a elementor-widget elementor-widget-text-editor\" data-id=\"7f1320a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Contact our team today about grain residue testing and our other <a href=\"https:\/\/symbiolabs.com.au\/services\/agricultural-testing\/\">agricultural testing<\/a> capabilities.\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c4ccc65 e-flex e-con-boxed e-con e-parent\" data-id=\"c4ccc65\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0064e2b elementor-align-center elementor-widget elementor-widget-button\" data-id=\"0064e2b\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/symbiolabs.com.au\/contact-us\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact Symbio Now<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Residue testing in grain looks at Organochlorines (OC), Organophosphates (OP) and Synthetic Pyrethroids (SP) which are chemical compounds that are used as insecticides. Organochlorines are a risk because they persist in the environment and the fat of animals, thus posing a potential risk to public health. The chemical is concentrated in the fat of animals [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":8961,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/posts\/8959"}],"collection":[{"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/comments?post=8959"}],"version-history":[{"count":5,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/posts\/8959\/revisions"}],"predecessor-version":[{"id":8970,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/posts\/8959\/revisions\/8970"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/media\/8961"}],"wp:attachment":[{"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/media?parent=8959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/categories?post=8959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/symbiolabs.com.au\/wp-json\/wp\/v2\/tags?post=8959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}