{"id":2118,"date":"2026-10-14T21:07:05","date_gmt":"2026-10-14T20:07:05","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/conversores\/conversor-ppm-mg-m3-gases\/"},"modified":"2026-10-14T21:07:05","modified_gmt":"2026-10-14T20:07:05","slug":"conversor-ppm-mg-m3-gases","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/conversores\/conversor-ppm-mg-m3-gases\/","title":{"rendered":"Conversor de ppm para mg\/m\u00b3 de gases"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Converter entre ppm e mg\/m\u00b3<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2118\" data-favorite-title=\"Gases: ppm para mg\/m\u00b3\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/conversores\/conversor-ppm-mg-m3-gases\/\" data-favorite-excerpt=\"Converta concentra\u00e7\u00f5es de gases entre ppm (volume) e mg\/m\u00b3 (massa) usando a lei dos gases ideais. Informe a concentra\u00e7\u00e3o, a massa molar do g\u00e1s, a temperatura e a press\u00e3o para obter resultados instant\u00e2neos em mg\/m\u00b3, ppm e \u00b5g\/m\u00b3.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-chemistry\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/pt\/conversores\/conversor-ppm-mg-m3-gases\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2118\" data-post=\"2118\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Concentra\u00e7\u00e3o do g\u00e1s<\/label><div class=\"term\">C<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"concentrao_do_gs\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 100\" min=\"0\" value=\"100\"\/><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"ppm\" selected>ppm<\/option><option value=\"mgm3\">mg\/m\u00b3<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-1\">Valor da concentra\u00e7\u00e3o no ar que voc\u00ea conhece<\/small><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-3\">Massa molecular<\/label><div class=\"term\">M<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"massa_molecular\" id=\"field-3\" aria-describedby=\"calc-unit-3 calc-info-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0.1\" value=\"44.01\"\/><div class=\"unit\" id=\"calc-unit-3\">g\/mol<\/div><small id=\"calc-info-3\">Massa molar do g\u00e1s, por exemplo, 44,01 para o CO\u2082, 28,97 para o ar<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-4\">Temperatura<\/label><div class=\"term\">T<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"number\" name=\"temperatura\" id=\"field-4\" aria-describedby=\"calc-info-4\" step=\"any\" value=\"25\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"c\" selected>\u00b0C<\/option><option value=\"f\">\u00b0F<\/option><option value=\"k\">K<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-4\">Temperatura do g\u00e1s<\/small><\/div><div class=\"field has-term\" id=\"input-4\"><label for=\"field-6\">Press\u00e3o<\/label><div class=\"term\">P<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"presso\" id=\"field-6\" aria-describedby=\"calc-info-6\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0.001\" value=\"1\"\/><div class=\"grid grid-cols-1\"><select id=\"field-7\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"atm\" selected>atm<\/option><option value=\"kpa\">kPa<\/option><option value=\"bar\">bar<\/option><option value=\"mmhg\">mmHg<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-6\">Press\u00e3o atmosf\u00e9rica<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2118\">Calcular<\/button><button type=\"reset\">Redefinir<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calcular automaticamente<\/label><small>Se ativado, o resultado \u00e9 atualizado automaticamente quando voc\u00ea altera qualquer valor.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Concentra\u00e7\u00e3o equivalente<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Concentra\u00e7\u00e3o em mg\/m\u00b3<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"mg\/m\u00b3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Concentra\u00e7\u00e3o em ppm<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"ppm\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Concentra\u00e7\u00e3o em \u00b5g\/m\u00b3<\/span><\/span><span class=\"field-value\" id=\"result-3\" data-unit=\"\u00b5g\/m\u00b3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copiar link para este c\u00e1lculo<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Deixar um coment\u00e1rio<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"2118\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">O que voc\u00ea achou deste resultado?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Curti <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">\u00datil <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confuso <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Decepcionado <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Impreciso <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>F\u00f3rmula do conversor de ppm para mg\/m\u00b3 de gases<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">F\u00f3rmula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[\nC_{mg\/m^3} = \\frac{C_{ppm} \\cdot M \\cdot P}{R \\cdot T}\n\\qquad \\text{e} \\qquad\nC_{ppm} = \\frac{C_{mg\/m^3} \\cdot R \\cdot T}{M \\cdot P}\n\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(C_{ppm}\\) \u2014 concentra\u00e7\u00e3o em partes por milh\u00e3o em volume (ppm)<\/li>\n<li>\\(C_{mg\/m^3}\\) \u2014 concentra\u00e7\u00e3o em miligramas por metro c\u00fabico (mg\/m\u00b3)<\/li>\n<li>\\(M\\) \u2014 massa molecular (massa molar) do g\u00e1s, em g\/mol<\/li>\n<li>\\(P\\) \u2014 press\u00e3o em atmosferas (atm)<\/li>\n<li>\\(T\\) \u2014 temperatura absoluta em kelvin (K)<\/li>\n<li>\\(R = 0.082057\\) \u2014 constante dos gases ideais em L\u00b7atm\/(mol\u00b7K)<\/li>\n<\/ul>\n<p>Essas f\u00f3rmulas fazem a convers\u00e3o entre uma concentra\u00e7\u00e3o em volume (ppm) e uma concentra\u00e7\u00e3o em massa (mg\/m\u00b3) com base na lei dos gases ideais. A 25 \u00b0C e 1 atm, o fator \\(R \\cdot T\\) vale 24,45 \u2014 da\u00ed a regra cl\u00e1ssica \\(mg\/m^3 = ppm \\times M \/ 24.45\\).<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-2\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>ppm para mg\/m\u00b3 de gases \u2013 Exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> converter 100 ppm de di\u00f3xido de carbono (CO\u2082) para mg\/m\u00b3 a 25 \u00b0C e 1 atm. A massa molecular do CO\u2082 \u00e9 44,01 g\/mol.<\/p>\n<p>\\[<br \/>\nT = 25 + 273.15 = 298.15\\ \\text{K}<br \/>\n\\]<\/p>\n<p>\\[<br \/>\nC_{mg\/m^3} = \\frac{100 \\times 44.01 \\times 1}{0.082057 \\times 298.15}<br \/>\n= \\frac{4401}{24.4686} \\approx 179.86<br \/>\n\\]<\/p>\n<p><strong>Resultado:<\/strong> 100 ppm de CO\u2082 a 25 \u00b0C e 1 atm \u2248 179,86 mg\/m\u00b3 (cerca de 179.861 \u00b5g\/m\u00b3).<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora<\/h2>\n<ol>\n<li>Digite a <strong>concentra\u00e7\u00e3o do g\u00e1s<\/strong> que voc\u00ea conhece e escolha a unidade \u2014 <em>ppm<\/em> ou <em>mg\/m\u00b3<\/em> \u2014 na lista suspensa ao lado do valor.<\/li>\n<li>Informe a <strong>massa molecular<\/strong> do g\u00e1s em g\/mol (por exemplo, 44,01 para o CO\u2082, 28,97 para o ar, 64,07 para o SO\u2082).<\/li>\n<li>Digite a <strong>temperatura<\/strong> do g\u00e1s e selecione \u00b0C, \u00b0F ou K.<\/li>\n<li>Digite a <strong>press\u00e3o<\/strong> e selecione atm, kPa, bar ou mmHg.<\/li>\n<li>Leia os resultados: a concentra\u00e7\u00e3o equivalente \u00e9 exibida em <strong>mg\/m\u00b3<\/strong>, <strong>ppm<\/strong> e <strong>\u00b5g\/m\u00b3<\/strong>.<\/li>\n<\/ol>\n<h2>O que significam ppm e mg\/m\u00b3<\/h2>\n<p>As concentra\u00e7\u00f5es de gases podem ser expressas de duas maneiras fundamentalmente diferentes. O <strong>ppm (partes por milh\u00e3o)<\/strong> \u00e9 uma unidade baseada em volume: indica quantos volumes de g\u00e1s existem por milh\u00e3o de volumes da mistura de ar. J\u00e1 o <strong>mg\/m\u00b3<\/strong> \u00e9 uma unidade baseada em massa: indica quantos miligramas da subst\u00e2ncia est\u00e3o presentes em cada metro c\u00fabico de ar. Limites de exposi\u00e7\u00e3o ocupacional, medi\u00e7\u00f5es em ambientes de trabalho e padr\u00f5es de qualidade do ar alternam entre os dois sistemas, por isso uma convers\u00e3o confi\u00e1vel costuma ser necess\u00e1ria.<\/p>\n<p>A convers\u00e3o depende do pr\u00f3prio g\u00e1s. Um ppm de uma mol\u00e9cula pesada, como o di\u00f3xido de enxofre (M = 64,07 g\/mol), corresponde a mais que o dobro de mg\/m\u00b3 do que um ppm de uma mol\u00e9cula leve, como o metano (M = 16,04 g\/mol). \u00c9 por isso que a calculadora pede a massa molecular \u2014 n\u00e3o existe um \u00fanico fator de convers\u00e3o universal.<\/p>\n<p>Temperatura e press\u00e3o tamb\u00e9m importam. Como a convers\u00e3o se baseia na lei dos gases ideais, o volume ocupado por um mol de g\u00e1s diminui em temperaturas baixas ou press\u00f5es altas, de modo que o mesmo valor em ppm passa a corresponder a uma concentra\u00e7\u00e3o maior em mg\/m\u00b3. Se voc\u00ea mantiver os valores padr\u00e3o (25 \u00b0C, 1 atm), os resultados coincidem com o divisor cl\u00e1ssico de 24,45 usado na maioria das refer\u00eancias de higiene ocupacional. Para entender como temperatura e press\u00e3o afetam as propriedades do pr\u00f3prio ar, experimente a <a href=\"https:\/\/wpcalc.com\/pt\/conversores\/densidade-do-ar\/\">calculadora de Densidade do Ar<\/a>.<\/p>\n<h2>Premissas e limita\u00e7\u00f5es<\/h2>\n<ul>\n<li><strong>Comportamento de g\u00e1s ideal.<\/strong> O c\u00e1lculo assume que a mistura gasosa segue a lei dos gases ideais. Isso \u00e9 preciso para concentra\u00e7\u00f5es de tra\u00e7o em temperaturas e press\u00f5es comuns; desvios aparecem em press\u00f5es muito altas ou temperaturas muito baixas.<\/li>\n<li><strong>ppm em volume.<\/strong> A calculadora converte ppm<sub>v<\/sub> (raz\u00e3o volum\u00e9trica). N\u00e3o a use para ppm em massa (ppm<sub>w<\/sub>) de l\u00edquidos ou subst\u00e2ncias dissolvidas \u2014 nesses casos, a ferramenta certa \u00e9 o <a href=\"https:\/\/wpcalc.com\/pt\/conversores\/conversor-ppm-porcentagem-mg-l\/\">Conversor de PPM<\/a> (ppm para porcentagem e mg\/L).<\/li>\n<li><strong>G\u00e1s seco.<\/strong> A umidade n\u00e3o \u00e9 levada em conta. Uma umidade elevada altera ligeiramente o volume molar real do ar.<\/li>\n<li><strong>Condi\u00e7\u00f5es de refer\u00eancia importam.<\/strong> Ao comparar com limites legais ou dados publicados, verifique se eles se referem a 25 \u00b0C (como na pr\u00e1tica da OSHA e na australiana) ou a 20 \u00b0C\/101,3 kPa (comum na Europa) e ajuste a temperatura de acordo.<\/li>\n<li><strong>Precis\u00e3o de M.<\/strong> Use a massa molar correta do g\u00e1s puro ou da mistura; uma massa molecular errada desloca o resultado proporcionalmente.<\/li>\n<\/ul>\n<h2>Refer\u00eancia r\u00e1pida: gases comuns a 25 \u00b0C e 1 atm<\/h2>\n<table>\n<thead>\n<tr>\n<th>G\u00e1s<\/th>\n<th>Massa molecular (g\/mol)<\/th>\n<th>1 ppm equivale a (mg\/m\u00b3)<\/th>\n<th>1 mg\/m\u00b3 equivale a (ppm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ar<\/td>\n<td>28.97<\/td>\n<td>1.18<\/td>\n<td>0.845<\/td>\n<\/tr>\n<tr>\n<td>Mon\u00f3xido de carbono (CO)<\/td>\n<td>28.01<\/td>\n<td>1.14<\/td>\n<td>0.873<\/td>\n<\/tr>\n<tr>\n<td>Di\u00f3xido de carbono (CO\u2082)<\/td>\n<td>44.01<\/td>\n<td>1.80<\/td>\n<td>0.556<\/td>\n<\/tr>\n<tr>\n<td>Di\u00f3xido de enxofre (SO\u2082)<\/td>\n<td>64.07<\/td>\n<td>2.62<\/td>\n<td>0.382<\/td>\n<\/tr>\n<tr>\n<td>Di\u00f3xido de nitrog\u00eanio (NO\u2082)<\/td>\n<td>46.01<\/td>\n<td>1.88<\/td>\n<td>0.532<\/td>\n<\/tr>\n<tr>\n<td>Oz\u00f4nio (O\u2083)<\/td>\n<td>48.00<\/td>\n<td>1.96<\/td>\n<td>0.510<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Os valores acima s\u00f3 valem a 25 \u00b0C e 1 atm. Em outras condi\u00e7\u00f5es, fa\u00e7a sempre a convers\u00e3o completa com a temperatura e a press\u00e3o reais \u2014 ou explore outras convers\u00f5es de unidades, como o <a href=\"https:\/\/wpcalc.com\/pt\/conversores\/conversor-de-densidade\/\">Conversor de Densidade<\/a> ou a <a href=\"https:\/\/wpcalc.com\/en\/converters\/pressure-altitude-calculator\/\">calculadora de Altitude de Press\u00e3o<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Converta concentra\u00e7\u00f5es de gases entre ppm (volume) e mg\/m\u00b3 (massa) usando a lei dos gases ideais. Informe a concentra\u00e7\u00e3o, a massa molar do g\u00e1s, a temperatura e a press\u00e3o para obter resultados instant\u00e2neos em mg\/m\u00b3, ppm e \u00b5g\/m\u00b3.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[27],"class_list":["post-2118","post","type-post","status-publish","format-standard","hentry","category-conversores","tag-unidades-de-quimica"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/comments?post=2118"}],"version-history":[{"count":0,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2118\/revisions"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}